RedCap 12" Rear Wheel Assembly for 110–150cc Pit Bikes — 12x1.85 Rim, 15mm Axle, 187mm Rotor & 428 41T Sprocket

RedCap 12" rear wheel assembly is a complete direct-replacement wheel built for 110–150cc dirt pit bikes, including a 187mm brake rotor and 428 41T sprocket for ready-to-ride rear-end performance.

This assembled rear wheel is engineered to fit many Chinese-style pit bikes—Apollo, SSR, TaoTao and XR/CRF-type models—offering a robust alternative to worn stock wheels. It combines a 12" x 1.85" rim, 32 heavy-duty spokes, sealed 6202RS bearings and a 15mm axle bore into one kit so you can replace the rear hub, rotor and sprocket in one go. The package is intended as a straightforward swap for owners who want a durable, track-ready rear end without hunting for multiple parts.

Will this wheel fit my 110cc or 125cc pit bike?

Compatibility centers on axle diameter and brake/sprocket bolt patterns. This wheel is made for 15mm axle setups common to many 110–125cc Chinese pit bikes and supports 3.00 x 12 tires; confirm your bike’s axle size and bolt spacing before ordering.

• 15mm axle bore—verify your bike’s axle diameter.
• Supports 3.00 x 12 tires and standard 12" rims.
• 64mm sprocket and 70mm rotor bolt spacing for common pit bike hubs.
• Works with XR/CRF-style and many Tao 15mm configurations.

How durable and serviceable is this assembly?

Durability is built into the design: 32 heavy-duty spokes, sealed 6202RS bearings, and a steel rotor and sprocket deliver long life under trail and track use. Bearings and spokes are standard sizes, so routine maintenance and replacement remain straightforward for home mechanics.

• 32 spokes for improved stiffness and load distribution.
• Sealed 6202RS bearings to keep out dirt and water.
• Steel 187mm disc rotor for consistent braking engagement.
• 428 41T sprocket compatible with common chains and drivetrains.

How easy is installation and what should I check first?

Installation is intended to be a direct swap if your bike uses the same axle size and bolt patterns; you’ll only need basic hand tools and time. Before installation, confirm axle diameter, rotor and sprocket bolt pattern, and chain size to avoid fitment issues.

• Confirm 15mm axle compatibility before purchase.
• Check your chain is 428 and sprocket teeth count (41T) aligns with gearing goals.
• Verify rotor bolt spacing (70mm) and sprocket spacing (64mm) match your caliper and carrier.
• Basic tools required: axle wrench, torque tool, and possibly caliper alignment tools.

Who this is for: Riders, mechanics and hobbyists who own 110–150cc dirt pit bikes and need a ready-made replacement rear wheel with rotor and sprocket. It’s suited for racers and trail riders wanting a rugged wheel that simplifies repairs and restores predictable braking and chain engagement—so long as the bike uses a 15mm axle and common pit-bike bolt patterns.