A strong fixed gear hub should match your frame spacing, wheel’s spoke count and intended cog setup; riders building track or single-speed wheels should start with those fit details. This roundup compares ten options, from the flip-flop Sturmey Archer Track Rear Hub to bolt-on hubs supplied with a freewheel and lockring. The products differ in important ways: some offer a fixed/fixed or fixed/freewheel interface, while others are coaster-brake hubs that brake when you pedal backward.
Several list 120mm rear spacing, but not all use the same axle dimensions or spoke count. Treat the product descriptions as a starting point, then confirm the exact hub version and compatibility with your frame, rim, cog and drivetrain before ordering.
The picks below prioritize fixed-gear fit and useful, clearly stated specifications.
The Sturmey Archer Track Rear Hub is the Best Fixed Gear Hubs pick because its flip-flop threaded rear accepts a freewheel on one side and a track cog with lockring on the other. It has 32 spoke holes, a sealed cartridge bearing and 130mm axle spacing, convertible to 120mm by removing a spacer. That combination makes it the most clearly specified option for riders choosing between fixed and freewheel setups, provided its spacing and axle dimensions suit the frame.
Our Top Picks

Its flip-flop threads accept a freewheel or track cog with lockring; 32H and spacing convertible from 130mm to 120mm are clearly specified.
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Fixed/Fixed OptionThe fixed/fixed version has 36H, 120mm rear spacing, sealed cartridge bearings and a hollow-core heat-treated axle for track-style builds.
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Most Hole ChoicesThis fixed-gear hub set lists 20H, 24H and 32H options, 100mm front and 120mm rear spacing, plus sealed bearings.
View on Amazon- Fixed/Freewheel Option Origin8 Pro-Pulsion Lite
Compare Fixed-Gear Hub Options
| # | Product | Material | Weight | Package Dimensions | Buy |
|---|---|---|---|---|---|
| 1 | 1. Sturmey Archer Track HubBest Overall | Multi | 1 lb | 9 x 4.5 x 4 in | View on Amazon |
| 2 | 2. Origin8 SS-1101 Fixed/FixedFixed/Fixed Option | Multiple | 9.92 oz | 9 x 4.5 x 4 in | View on Amazon |
| 3 | 3. POLSO FH003 Hub SetMost Hole Choices | Aluminum | 489 g | — | View on Amazon |
| 4 | 4. Origin8 Pro-Pulsion LiteFixed/Freewheel Option | Multiple | — | 9.29 x 5.04 x 2.99 in | View on Amazon |
| 5 | 5. Generic Track HubMulti-count track wheel builders | Acrylic | — | 0.39 x 0.39 x 0.39 in | View on Amazon |
| 6 | 6. RESHINU 17T Rear Hub GoldLighter 17T hub builds | Alloy Steel | — | — | View on Amazon |
| 7 | 7. RESHINU 17T Rear Hub Silver17T supplied-hardware riders | Alloy Steel | — | — | View on Amazon |
| 8 | 8. Black Ops MX-1100 HubBolt-on sealed-bearing BMX users | Aluminum | 10.4 oz | — | View on Amazon |
| 9 | 9. VTORFUN Coaster Brake HubBack-pedal brake conversions | — | — | 7.48 x 4.76 x 3.74 in | View on Amazon |
| 10 | 10. CXGMYLZZ Coaster HubBack-pedal braking builds | Aluminum | 1.7 lb | — | View on Amazon |
Detailed Reviews: Best Fixed Gear Hubs

#1 · Best Overall
1. Sturmey Archer Track Hub
- Material: Multi
- Weight: 1 lb
- Package Dimensions: 9 x 4.5 x 4 in
Best for: Flip-flop track wheel builders.
Why it ranks #1: Its flip-flop threads accept a freewheel or track cog with lockring; 32H and spacing convertible from 130mm to 120mm are clearly specified.
A flip-flop threaded rear lets the Sturmey Archer Track hub accept a freewheel on one side and a track cog with lockring on the other. That arrangement gives riders two drivetrain configurations from one rear hub, with 32 spoke holes and a solid nutted axle for wheelbuilding.
The 6061 aluminum shell and sealed cartridge bearing pair a stated material with a defined bearing type, while the solid nutted axle provides a conventional bolted wheel attachment. Its 32 J-bend spoke holes support standard wheelbuilding, and the hub is listed as compatible with rim brakes. Rear spacing is 130mm as supplied and can be converted to 120mm by removing a spacer, giving builders a specified adjustment path for frame compatibility.
- Flip-flop threads accept freewheel or track cog and lockring
- 32 J-bend spoke holes
- Sealed cartridge bearing and 6061 aluminum shell
- 130mm spacing convertible to 120mm by spacer removal
- Changing from 130mm to 120mm spacing requires removing a spacer.
Skip it if you need a supplied 17T freewheel and locking ring with the hub; the RESHINU 32/36H rear hub includes both.
This Sturmey Archer suits wheel builders wanting a 32-hole flip-flop hub and a stated route from 130mm to 120mm spacing. Its spacer conversion and rim-brake compatibility define useful boundaries for the finished wheel.
Full product details
| Brand | Sturmey Archer |
|---|---|
| Color | Black |
| Included Components | Rear Hub |
| Item Dimensions LxWxH | 9 x 4.5 x 4 inches |
| Item Package Dimensions L x W x H | 9 x 4.5 x 4 inches |
| Item Weight | 1 pounds |
| Manufacturer | Sturmey Archer |
| Material | Multi |
| Model | Track |
| Package Weight | 1 pounds |
| Style | Rear Hub |
| Warranty Description | Limited Warranty |
Listed on Amazon as: Sturmey Archer Track Rear Hub, 32H – Black Anodized – HBT30.RUAC.BA0.BX 10
View on Amazon
#2 · Fixed/Fixed Option
2. Origin8 SS-1101 Fixed/Fixed
- Material: Multiple
- Weight: 9.92 oz
- Package Dimensions: 9 x 4.5 x 4 in
Best for: 36-hole fixed-cog setups.
Why it ranks #2: The fixed/fixed version has 36H, 120mm rear spacing, sealed cartridge bearings and a hollow-core heat-treated axle for track-style builds.
The FX/FX designation identifies this Origin8 rear hub as a fixed/fixed configuration, making it distinct from the brand's track/freewheel listing. With 36×120 specified, it targets wheel builders wanting 36 spoke holes and 120mm rear spacing for a fixed-cog setup.
The 36×120 marking gives builders two critical dimensions: a 36-hole drilling and 120mm rear spacing. Sealed cartridge bearings are specified, supporting a defined bearing setup, while the high-flange design describes the hub geometry for wheel construction. The hollow-core, heat-treated axle is described as lightweight, offering a component-level weight consideration without a listed hub weight. The FX/FX model designation is the key configuration distinction for riders choosing a fixed/fixed rather than track/freewheel arrangement.
- FX/FX fixed/fixed configuration
- 36-hole drilling and 120mm spacing stated
- Sealed cartridge bearings
- High-flange design with hollow-core heat-treated axle
- Fixed/fixed configuration does not provide a listed track/freewheel arrangement.
Skip it if you want a track/freewheel flip-flop; the Origin8 Pro-Pulsion Lite Track Hub is listed as rear track/freewheel.
This Origin8 fits builders seeking a 36-hole fixed/fixed rear hub with 120mm spacing and sealed cartridge bearings. Its FX/FX configuration is the boundary to note if you want a freewheel option on one side.
Full product details
| Brand | Origin8 |
|---|---|
| Color | Sil |
| Included Components | Rear Hub |
| Item Dimensions LxWxH | 9 x 4.5 x 4 inches |
| Item Package Dimensions L x W x H | 9 x 4.5 x 4 inches |
| Item Weight | 9.92 ounces |
| Manufacturer | Origin8 |
| Material | Multiple |
| Model | SS-1101 Single Speed Hubs |
| Model Year | 2012 |
| Package Weight | 10.08 ounces |
| Style | Rear Hub |
| Warranty Description | Limited Warranty |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Origin8 HUB RR OR8 SS1101 H/A BO FX/FX 36×120 SB SL
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#3 · Most Hole Choices
3. POLSO FH003 Hub Set
- Material: Aluminum
- Weight: 489 g
Best for: Sealed-bearing track builders.
Why it ranks #3: This fixed-gear hub set lists 20H, 24H and 32H options, 100mm front and 120mm rear spacing, plus sealed bearings.
Sealed bearings give the POLSO FH003 its clearest practical distinction, supporting smooth rotation while keeping the hub configuration focused on a fixed-gear build. The listed front and rear dimensions, spoke options, and chain interface help wheel builders assess fit before selecting this aluminum-alloy set.
The set specifies a 100mm front and 120mm rear O.L.D., with 20-hole front and 24-hole rear sizing listed alongside 32-hole options. That combination gives builders defined spacing and drilling details for planning a wheelset. CNC machining is described as producing precise dimensions, while sealed bearings support smooth rotation. The 1/8-inch chain specification and stated cog and lock threads help identify drivetrain interface requirements; the aluminum-alloy hubs and AL-7075 axles complete the construction details.
- Sealed bearings specified for front and rear hubs
- CNC-machined aluminum-alloy construction
- 100mm front and 120mm rear O.L.D.
- 1/8-inch chain compatibility stated
- The specified 20H front and 24H rear configuration is not a matching spoke count.
Skip it if you need a 32-hole rear hub with a freewheel and track-cog flip-flop; the Sturmey Archer Track Rear Hub lists 32 holes.
The POLSO set fits builders seeking sealed-bearing hubs with stated axle spacing and 1/8-inch chain compatibility. Its front and rear hole counts differ in the listed size, so confirm the selected drilling suits your wheel plan.
Full product details
| Brand | POLSO |
|---|---|
| Color | Gray |
| Included Components | A set Fixed Gear Bicycle Hub |
| Item Weight | 489 g |
| Manufacturer | POLSO |
| Material | Aluminum |
| Model | fixed gear hub |
| Size | F20H R24H |
| Warranty Description | 90DAY |
Listed on Amazon as: FH003 20H-24H-32H Fixed Gear Hub Track Bike Cube Aluminum Alloy Axle Cycling Hubs Fixed Gear Hub
View on Amazon
#4 · Fixed/Freewheel Option
4. Origin8 Pro-Pulsion Lite
- Material: Multiple
- Package Dimensions: 9.29 x 5.04 x 2.99 in
Best for: Lightweight 120mm rear builds.
Why it ranks #4: Its rear hub is described for track or freewheel use, with 120mm rear spacing, sealed cartridge bearings and a lightweight heat-treated axle.
A hollow-core, heat-treated axle is the defining detail of the Origin8 Pro-Pulsion Lite rear track/freewheel hub, linking its lighter-design claim to a specific component. Its 120mm rear spacing and sealed cartridge bearings give builders concrete configuration details for a single-speed rear wheel.
The 120mm rear spacing is specified alongside a 100mm front measurement for the hub range, helping builders distinguish the rear fit from the front dimension. Sealed cartridge bearings provide the listed bearing arrangement, while the high-flange design describes the hub geometry. The hollow-core, heat-treated axle is identified as lightweight, tying the lighter-design emphasis to the axle rather than an unsupported total-weight claim. The product title identifies a rear track/freewheel hub for riders choosing that configuration.
- Hollow-core, heat-treated lightweight axle
- Sealed cartridge bearings
- High-flange design
- 120mm rear spacing specified
- This listing specifies a 120mm rear hub, not a stated 130mm spacing option.
Skip it if you need a rear hub with a stated 130mm spacing convertible to 120mm; the Sturmey Archer Track Rear Hub lists that adjustment.
Choose the Origin8 for a rear track/freewheel wheel build calling for 120mm spacing, sealed cartridge bearings, and a hollow-core axle. Its listing does not provide a 130mm rear-spacing alternative, so the frame dimension matters.
Full product details
| Brand | Origin8 |
|---|---|
| Color | Sil |
| Included Components | Rear Hub |
| Item Dimensions LxWxH | 13 x 9.5 x 5 inches |
| Item Package Dimensions L x W x H | 9.29 x 5.04 x 2.99 inches |
| Manufacturer | Origin8 |
| Material | Multiple |
| Model | SS-1101 Single Speed Hubs |
| Model Year | 2012 |
| Package Weight | 0.31 kg |
| Style | Rear Hub |
| Warranty Description | Limited Warranty |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Origin8 Pro-Pulsion Lite Track Hub – Rear Track/Freewheel
View on Amazon
#5
5. Generic Track Hub
- Material: Acrylic
- Package Dimensions: 0.39 x 0.39 x 0.39 in
Best for: Multi-count track wheel builders.
Why it ranks #5: It is specifically described for track and fixed-gear use and offers 20H through 36H options with sprockets and lock nuts included.
Five listed spoke-hole choices—20H, 24H, 28H, 32H, and 36H—make this Generic track hub adaptable to different wheelbuilding plans. It is supplied with sprockets and lock nuts according to the listing, helping streamline assembly for fixed-gear or single-speed builds.
The range of hole counts lets builders select among several stated drilling options, while the listed 100mm front and 120mm rear O.L.D. identify the hub spacing. Two sealed bearings are specified, and the 14G gauge gives a spoke detail for planning. Matched sprockets and lock nuts are described as included for direct installation, reducing separate assembly steps. The listing also gives a rear axle length of 165mm and distinguishes a double fixed-gear side in one stated configuration.
- 20H, 24H, 28H, 32H, and 36H options listed
- 100mm front and 120mm rear O.L.D.
- Two sealed bearings specified
- Sprockets and lock nuts listed as included
- The supplied specifications conflict on material, listing aluminum alloy in features but acrylic in specifications.
Skip it if you need a consistently specified aluminum-alloy hub with CNC machining; the RESHINU 32/36H rear hub lists both.
This option suits builders who value multiple spoke-count choices and listed sprockets and lock nuts for track or single-speed assembly. The conflicting material descriptions are a notable limit when material certainty is important.
Full product details
| Brand | Generic |
|---|---|
| Color | Silver 28H-28H |
| Item Package Dimensions L x W x H | 0.39 x 0.39 x 0.39 inches |
| Manufacturer | Generic |
| Material | Acrylic |
| Model | BEJAFFHGJ-SILVER28H-28H-NO |
| Package Weight | 50 g |
| Size | No |
Listed on Amazon as: Fixed Gear Track Hub 20H 24H 28H 32H 36H Single Speed Bike Hub with Sprockets Lock Nuts Bike Parts
View on AmazonWhy it ranks #6: This 32/36H bolt-on hub lists 3/8-inch by 120mm sizing and includes a 17T freewheel and locking ring, though it is not a fixed cog setup.
At a listed 283g, this RESHINU 17T rear hub is lighter than the brand's other supplied 17T model, while retaining a 3/8-inch by 120mm bolt-on solid shaft. That combination suits builders prioritizing a lighter listed hub with freewheel hardware included.
The 32/36-hole drilling is specified for 14G spokes, giving wheel builders a choice of spoke count while keeping the listed gauge clear. Its CNC-machined aluminum-alloy construction and openwork design are described as lightweight and sturdy, and the stated 283g weight makes that claim more concrete. The package includes a 17T freewheel and locking ring, simplifying collection of those parts. A 3/8-inch by 120mm solid shaft sets the rear axle and spacing requirements.
- Listed hub weight is 283g
- Includes 17T freewheel and locking ring
- 32/36 holes compatible with 14G spokes
- 3/8-inch by 120mm bolt-on solid shaft
- The listed 17T freewheel limits the included gearing to that tooth count.
Skip it if you need 18-tooth gearing with back-pedal braking; the CXGMYLZZ 36 Hole Coaster Brake Rear Hub lists an 18-tooth flywheel.
This RESHINU suits a 14G-spoke single-speed build where the included 17T freewheel and lower listed hub weight appeal. Its 120mm spacing and fixed 17T supplied gearing are the key fit and setup boundaries.
Full product details
| Brand | RESHINU |
|---|---|
| Color | Gold |
| Manufacturer | RESHINU |
| Part Number | 001 |
| Material | Alloy Steel |
| Model Number | 001 |
| Wheel Size | 1 centimeters |
Listed on Amazon as: Fixed Gear Bike Rear Hub 32/36H Holes Bolt-on Solid Shaft Hubs 3/8"120mm Backward Cycling Aluminum Alloy Hub with 17T Freewheel
View on AmazonWhy it ranks #7: It offers 32/36H, 3/8-inch by 120mm sizing and an included 17T freewheel with locking ring; listed weight is 436g.
The RESHINU rear hub arrives with a 17-tooth freewheel and locking ring, so its single-speed setup includes key threaded components rather than requiring separate sourcing. Its 32- or 36-hole drilling and 3/8-inch by 120mm bolt-on axle make it a specific option for riders building a compatible rear wheel.
The 32/36-hole layout is listed as compatible with 14G spokes, giving wheel builders two spoke-count choices while retaining a stated spoke gauge. CNC-machined aluminum alloy and an openwork design are described as lightweight and sturdy; the listed hub weight is 436g. A 17T freewheel and locking ring come in the package, which can simplify gathering parts for a single-speed build. The 3/8-inch by 120mm solid shaft defines the axle and spacing requirements for the frame.
- Includes a 17T freewheel and locking ring
- 32- or 36-hole options for 14G spokes
- 3/8-inch by 120mm bolt-on solid shaft
- CNC-machined aluminum alloy with openwork design
- The listed 436g hub weight may not suit builds prioritizing the lightest rear hub.
Skip it if you need a flip-flop hub for switching between track cog and freewheel; the Sturmey Archer Track Rear Hub lists that arrangement.
Choose this RESHINU for a 14G-spoke single-speed rear wheel when the included 17T freewheel and locking ring suit your setup. Check that its 120mm spacing and axle specification match the frame before building.
Full product details
| Brand | RESHINU |
|---|---|
| Color | Silver |
| Manufacturer | RESHINU |
| Part Number | 001 |
| Material | Alloy Steel |
| Model Number | 001 |
| Wheel Size | 1 centimeters |
Listed on Amazon as: 32/36H Holes Fixed Gear Bike Rear Hub 17T Single Speed Hubs Bolt-on Solid Shaft Hub 3/8"120mm Backward Cycling Aluminum Alloy
View on Amazon
#8
8. Black Ops MX-1100 Hub
- Material: Aluminum
- Weight: 10.4 oz
Best for: Bolt-on sealed-bearing BMX users.
Why it ranks #8: This aluminum, sealed-bearing bolt-on hub has a rear flip-flop variation, but the listing does not specify its spacing or spoke count.
Sealed bearings and a bolt-on attachment define the Black Ops MX-1100, a compact aluminum BMX hub option with a rear flip-flop model listed. These core details make it relevant to riders seeking a straightforward hub format, though the supplied listing leaves key sizing choices to variation selection.
The aluminum construction and sealed bearings are the principal stated hardware details, while bolt-on mounting describes how the hub attaches. The MX-1100 range includes different flange sizes and spoke counts, and some models are rear flip-flop versions. The additional description says flip-flop hubs are 1-speed freewheel/freewheel, so buyers should distinguish that arrangement from a track/freewheel configuration. Because dimensions and spoke count are not specified for this listing, the variation determines whether it suits a particular wheel build.
- Aluminum hub construction
- Sealed bearings
- Bolt-on attachment
- MX-1100 range includes rear flip-flop versions
- The listed flip-flop configuration is freewheel/freewheel, not track-cog/freewheel.
Skip it if you require one hub side for a track cog and lockring; the Sturmey Archer Track Rear Hub specifies that flip-flop arrangement.
This Black Ops option suits BMX-oriented buyers who want aluminum, sealed bearings, and bolt-on mounting. Its variation-dependent spoke and flange choices, plus the stated freewheel/freewheel flip-flop, limit its fit for track-cog builds.
Full product details
| Brand | Black Ops |
|---|---|
| Item Dimensions | 5.9 x 2.05 x 2.1 inches |
| Item Weight | 10.4 ounces |
| Dimensions | 5.9 x 2.05 x 2.1 inches |
| Manufacturer | BLACK OPS |
| Material | Aluminum |
| Model | MX-1100 Rear Flip-Flop |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
Listed on Amazon as: Black Ops MX-1100 BMX Hubs
View on Amazon
#9
9. VTORFUN Coaster Brake Hub
- Package Dimensions: 7.48 x 4.76 x 3.74 in
Best for: Back-pedal brake conversions.
Why it ranks #9: The 36-hole hub combines a flywheel and back-pedal brake, so it suits a coaster-brake conversion rather than a conventional fixed-cog build.
The VTORFUN conversion hub combines a flywheel and brake, letting the rider pedal forward to drive and backward to brake. Its listing also says the bicycle can coast without pedaling, making this a distinct choice for a conversion where pedal-operated braking is central.
The 36-hole format identifies the spoke drilling for a rear-wheel conversion, while the integrated hub, flywheel, and brake combine several functions in one listed accessory. Forward pedaling drives the bike; backward pedaling activates braking, and the description says the bicycle can coast without pedaling. It also states that the bike cannot be ridden backward. These operating details help distinguish the hub from a track setup intended for fixed-wheel backward riding.
- 36-hole rear hub format
- Combines hub, flywheel, and brake
- Forward pedaling drives; backward pedaling brakes
- Description states the bicycle can coast without pedaling
- The listing says the bicycle cannot be ridden backward.
Skip it if you need a hub for riding backward on a fixed wheel; the POLSO FH003 is listed as a fixed-gear hub rather than a coaster-brake conversion.
Consider this VTORFUN for a 36-hole conversion where back-pedal braking and coasting are the intended operation. Its stated inability to ride backward is a meaningful boundary for riders seeking fixed-wheel behavior.
Full product details
| Brand | VTORFUN |
|---|---|
| Item Package Dimensions L x W x H | 7.48 x 4.76 x 3.74 inches |
| Package Weight | 0.83 kg |
Listed on Amazon as: Bicycle Coaster Brake Hub, 36 Hole Bike Brake Rear Hub,Easy Installation Backwards Brake, Bike Rear Hub for Fixed Gear Bicycle, MTB Bike
View on AmazonWhy it ranks #10: Its 18T flywheel and 180mm shaft are specified for back-pedal braking, making it a poor match for buyers seeking a standard fixed-gear hub.
A back-pedal coaster brake is the defining feature of this CXGMYLZZ rear hub: pedal forward to drive, then press the pedals backward to brake. That integrated control suits riders seeking a rear-wheel braking method operated through the crank rather than a separate hand lever.
The hub combines an 18-tooth flywheel with a coaster-brake mechanism, so the listed operation links forward pedaling to drive and backward pedal pressure to braking. Its shaft measures 180mm, and the open gear diameter is 111mm; those dimensions make it a more specific replacement choice than a general-purpose hub. The product is described for fixed-gear bicycles and bicycle pedal-brake rear wheels. The package lists one pedal-brake hub and one accessory, though the accessory details are incomplete.
- Back-pedal operation activates the brake
- 18-tooth flywheel specified
- 111mm open gear diameter and 180mm shaft listed
- Intended for fixed-gear and pedal-brake rear wheels
- Its back-pedal coaster-brake operation differs from a standard track-hub setup.
Skip it if you want a conventional flip-flop track hub; the Sturmey Archer Track Rear Hub lists freewheel and track-cog sides.
This hub suits riders building a rear wheel around pedal-forward drive and back-pedal braking, especially where coaster operation is the priority. Its 180mm shaft and 111mm open diameter make dimensional compatibility an important boundary.
Full product details
| Brand | CXGMYLZZ |
|---|---|
| Color | silver |
| Dimensions | 6.5"L x 4.9"W x 2.4"H |
| Item Weight | 1.7 pounds |
| Manufacturer | CXGMYLZZ |
| Part Number | 468200A1 |
| Material | Aluminum |
Listed on Amazon as: 36 Hole Reversing Ride Backwards Brake Fixed Gear Bike Rear Hub Aluminum Alloy Bicycle Bike Coaster Brake Rear Hub
View on AmazonAvoid confusing backward pedaling with fixed-gear drive
A hub that brakes when you pedal backward is not the same thing as a fixed-gear hub. The CXGMYLZZ Coaster Hub and VTORFUN Coaster Brake Hub both describe a back-pedal brake; the former lists an 18T flywheel and the latter combines hub, flywheel and brake. These mechanisms are intended to brake when the rider pedals backward, whereas the fixed-cog and flip-flop choices here are described around track or fixed-gear use.
A product title mentioning fixed gear does not settle the distinction. Check the hub’s drive interface and braking method before buying, especially when converting an existing wheel.
Choosing a coaster hub for a fixed-cog build can leave you with the wrong mechanism, even if its axle or spoke-hole count appears to fit. Likewise, do not assume a freewheel-equipped hub provides fixed-cog engagement.
Treat listed spacing as a fit check, not a guarantee
A stated rear spacing is only one part of confirming hub fit. The Sturmey Archer Track Hub lists a 130mm axle length and says it can convert to 120mm by removing a spacer; Origin8 lists 120mm rear spacing, while POLSO specifies 120mm rear O.L.D. The RESHINU hubs state 3/8-inch by 120mm, and the CXGMYLZZ coaster hub lists a 180mm shaft.
Those measurements are not interchangeable descriptions, and some products omit important fit details altogether. Before ordering, verify your frame’s rear spacing, axle diameter and required axle length against the exact product version.
Also confirm your rim’s spoke-hole count: this selection ranges from 32H to 36H for several rear hubs, while POLSO and the generic hub list additional options. A nominally compatible spacing cannot compensate for a mismatched axle or wheel build.
How to Choose a Fixed Gear Hub
Hub interface and braking type
Look first for the cog interface and braking style that match your build. The Sturmey Archer Track Hub has flip-flop threads for a freewheel on one side and track cog with lockring on the other; the Origin8 SS-1101 Fixed/Fixed is identified as fixed/fixed, while the Origin8 Pro-Pulsion Lite is described as track/freewheel. By contrast, the CXGMYLZZ and VTORFUN hubs use back-pedal braking.
Riders who want a choice between fixed and freewheel setups should consider the flip-flop design, while a dedicated fixed-cog wheel builder may prefer the fixed/fixed option. Choose a coaster-brake model only when that braking mechanism is what the bike needs, not merely because the listing mentions fixed gear.
Spacing and axle dimensions
Prioritize a hub whose stated dimensions match your frame, and verify what each measurement refers to. The Origin8 hubs list 120mm rear spacing; POLSO lists rear O.L.D. of 120mm, while the Sturmey Archer hub is 130mm and convertible to 120mm by removing a spacer.
RESHINU gives a 3/8-inch by 120mm axle specification, whereas CXGMYLZZ lists a 180mm shaft. These descriptions vary in detail, so do not assume the numbers refer to identical measurements.
Riders with a standard 120mm rear setup can begin with products explicitly listing 120mm, while those considering the Sturmey Archer should account for its conversion note. Confirm axle diameter, length and spacing against your frame before committing to a wheel build.
Spoke count and wheel build
Match the hub’s hole count to your rim and planned wheel build. The Sturmey Archer Track Hub is 32H; both Origin8 rear hubs list 36×120; RESHINU offers 32/36H; and POLSO lists 20H, 24H and 32H options. The Generic Track Hub lists an even broader range from 20H through 36H.
A rider replacing a hub in an existing wheel should match the rim’s hole count, while someone building a new wheel has more freedom to select among the listed options. Do not rely on a product family’s range alone: confirm the selected version’s actual count, since the generic listing’s specifications identify a 28H model despite describing multiple choices.
Spoke count is a compatibility requirement, not a substitute for checking flange and rim details.
Which Fixed Gear Hub Should You Choose?
For the clearest flexible track setup, choose the Sturmey Archer Track Hub: its flip-flop threads support a freewheel or track cog with lockring, and its spacing can convert from 130mm to 120mm. If you need a fixed/fixed hub with 36 holes and 120mm rear spacing, the Origin8 SS-1101 Fixed/Fixed is the direct fit to investigate. Wheel builders seeking multiple hole-count choices can consider the POLSO FH003 Hub Set, which lists 20H, 24H and 32H.
The Origin8 Pro-Pulsion Lite suits buyers considering a track/freewheel rear hub. RESHINU 17T Rear Hub Gold or RESHINU 17T Rear Hub Silver may suit a 120mm build that specifically calls for an included freewheel, but they are not the same as a fixed-cog hub.
Avoid both coaster-brake picks for a conventional fixed-cog setup.
Frequently Asked Questions
How do I confirm whether a hub’s rear spacing and axle fit my frame?
Measure the frame’s rear dropout spacing and check the axle type, diameter, and length against the hub details. Do not rely on a general “120mm” or “130mm” label alone; confirm the axle suits your dropouts. The Sturmey Archer listing specifies 130mm spacing and says it converts to 120mm by removing a spacer.
What is the difference between a flip-flop hub and a fixed/fixed hub?
A flip-flop hub has different threaded sides for different setups; the Sturmey Archer’s rear accepts a freewheel on one side and a track cog with lockring on the other. A fixed/fixed hub is intended for fixed cogs on both sides. Check the listing’s threading details before choosing.
Can a coaster-brake hub be used as a fixed-gear hub?
No, not as a conventional fixed-cog setup. A coaster-brake hub is identified by its backward-brake function, while a fixed-gear hub uses a fixed cog and, where specified, a lockring. The coaster-brake picks here are not recommended for a conventional fixed-cog build.
How many spoke holes should I choose?
Choose a hub whose spoke-hole count matches the rim you plan to build with. The listings include options such as 32 and 36 holes, while the FH003 lists 20H, 24H, and 32H. Confirm the rim’s count before ordering; the product title alone does not establish rim compatibility.
What should I check before choosing a hub that includes a freewheel?
Confirm whether the included or supported drive is a freewheel or a fixed cog with lockring, since they are not interchangeable descriptions. The RESHINU titles specify a 17T freewheel, so they may suit a 120mm build calling for that part, but they are not the same as a fixed-cog hub.
Final Words
For the clearest flexible track setup, choose the Sturmey Archer Track Rear Hub if its axle and spacing suit your frame: it supports a freewheel or a fixed cog with lockring and converts from 130mm to 120mm. For a 36-hole, 120mm fixed/fixed option, investigate the Origin8 SS-Match spoke count and threading to your wheel plan, and avoid the coaster-brake picks for a conventional fixed-cog build.




