A 14mm rear axle will not go into a frame built only for a 3/8-inch rear axle, and the Fit listing at LUXBMX tells buyers to confirm frame compatibility before ordering. Shopping for a 20-inch BMX wheel set comes down to four decisions: hub type, rim build, spoke count, and axle sizing.
Three of those four are already settled by the frame and fork in your garage. The fourth — hub type — is the one worth arguing about, and the price table below shows what the current options cost.
Which Rear Hub Fits The Way You Ride?
A cassette hub suits riders who pedal hard into tricks and want instant, conventional engagement; a freecoaster lets the bike roll backward without the cranks turning. A threaded freewheel is the budget design found on older and entry-level bikes.
Cassette hubs run a driver that slides onto the axle, so changing ratio means swapping the driver instead of the whole hub. The Fit Bike Co OEM 20-inch wheel set uses a 9-tooth cassette driver, comes in right- or left-hand drive, and pairs 36-hole rims with sealed hubs, a 3/8-inch male front axle and a 14mm male rear axle, sold as a pair with a rim strip. Fit’s OEM wheel set specifications list both drive sides, and the drive side has to match your frame and chainline.
Freecoasters add internal bearings and a slack mechanism so the driver disengages when you roll backward. The Fit Freecoaster 20-inch wheelset pairs a sealed rear freecoaster and 9-tooth driver with a double-wall Fit rim; no complete spec sheet or current price is published for that model, so confirm axle and drive details with the seller first. Federal’s Stance Motion freecoaster build with guards and butted spokes was listed at $408.00.
A threaded freewheel screws onto the hub body and stays common on entry-level bikes. Weinmann 519 36-hole wheels appear with 3/8-inch front and 14mm rear bolt-on axles, but hub and freewheel details shift by seller, so read each listing’s own spec line.
| Wheelset | Hub And Drive | Listed Price |
|---|---|---|
| Fit Bike Co OEM 20-inch | Sealed hubs, 9T cassette, RHD or LHD, 36H | $353.00 |
| Skyway Tuff II five-spoke 20-inch | Molded composite, five-spoke, pair | $197.00 sale; $212.00 regular |
| Skyway Tuff II 9T cassette 20-inch | Composite, 9T cassette driver | From $373.00 sale; $423.00 regular |
| Federal Stance Motion | Freecoaster, guards, butted spokes | $408.00 |
| Fit 20-inch cassette set | Cassette rear | $169.95 original; sold out |
| Sun Envy 20 x 1.75-inch | Welded rim, 36H | $226.41 |
| Weinmann 519 36H | Bolt-on, 3/8-inch front, 14mm rear | $89.17 |
Prices come from LUXBMX listings updated across 2025 and 2026. Stock and figures move, so recheck before you buy.
Rim And Spoke Count On A 20-Inch BMX Wheel Set: What The Numbers Decide
Double-wall rims carry a second wall between the tire bed and the spoke nipples, adding stiffness and impact resistance over single-wall rims, and double-butted spokes trim weight while holding strength. Neither feature publishes a rider-weight or jumping rating by itself, so use the manufacturer’s stated limits where a listing gives them and treat unstated limits as unstated. Fit’s OEM rims are 36-hole and built to balance low weight with strength.
Counts above 36 on 20-inch wheels usually belong to lowrider or decorative builds at 48, 72, or 144 spokes. Those are a different product with different rims and lacing, not a tougher freestyle wheel.
Skyway’s Tuff II is a molded composite wheel rather than a laced rim and spokes, so there is no spoke tension to keep true. LUXBMX listed the 20-inch five-spoke pair at $197.00 on sale against $212.00 regular, and a Tuff II 9-tooth cassette version from $373.00 on sale against $423.00 regular.
What To Check Before You Order
Match axle diameter, drive side, and hub type to the frame and fork you already own before you look at price. A bargain set that needs adapters or a new frame is not a bargain.
If comparing spec sheets against a dozen listings sounds like a Saturday you’d rather spend riding, our tested 20-inch BMX wheels roundup narrows the field to sets that fit common freestyle frames.
- Measure the dropouts: a 14mm rear axle will not fit a 3/8-inch frame, and a wider hub eats peg clearance.
- Confirm right- or left-hand drive against your frame and chainline before ordering a cassette.
- Check whether the rear hub takes a cassette driver or a threaded freewheel. The two are not interchangeable.
- Verify bead-seat diameter and rim width against your tire width, plus frame and fork clearance — 20-inch BMX products cover more than one tire standard.
- Confirm sealed bearings, axle material, rim strips, and any stated rider-weight limit.
- Recheck price and stock, since several models above were showing sold out.
FAQs
What Does RHD Or LHD Mean On A Cassette Wheel?
RHD means the drivetrain sits on the rider’s right side, LHD on the left. Grinding and rotation habits decide which side protects the chain and driver, and the hub must match your frame’s chainline and sprocket placement. A LHD hub will not work on a right-side-drive frame, so confirm the letters in the listing before ordering.
Is A Composite Wheel Like The Skyway Tuff II A Real Freestyle Option?
Yes, as a different design rather than a copy of a spoked wheel. Molded composite wheels skip spoke tension entirely, so there is nothing to true and no nipples to tighten. They are heavier in feel and flex differently from a laced rim, but LUXBMX lists both five-spoke and 9-tooth cassette Tuff II versions for 20-inch bikes.
Can I Swap A Freewheel For A Cassette Driver?
No. A threaded freewheel screws onto the hub body, while a cassette driver slides onto the axle with its own bearing and pawl assembly inside. The hub shell decides which one it accepts, so a freewheel hub cannot take a cassette driver. Buying the wrong rear wheel means buying a second one.
References & Sources
- LUXBMX. “Fit Bike Co OEM 20″ Wheelset” Supplies the 36-hole spec, 9T cassette driver, drive-side options, axle sizes, $353.00 price, and the frame-compatibility warning.
- LUXBMX. “BMX Complete Wheels” Source for 36-spoke lacing norms, butted spokes, and listed prices on Skyway, Federal, Sun Envy, and Weinmann wheel sets.