Choosing a reliable rear axle kit is essential for replacing worn or damaged parts on Coleman’s popular CT100U and CT200U mini bikes. The right axle diameter, length, and bearing setup determine fit, performance, and safety. The five recommended products below come from a trusted supplier and cover common CT100U and CT200U configurations, including 12mm or 14mm axles, varying lengths, and sealed ball bearings (6201RS or 6202RS). Each item is designed to simplify maintenance while improving ride durability in rugged, all-terrain conditions. Review the specs and compatibility notes to pick a solution that matches your mini bike model and riding needs.
| Product | Brand | Compatibility | Notable Feature |
|---|---|---|---|
| CILOYU 12mm 270mm Rear Axle Kit CT100U | CILOYU | Coleman CT100U | Includes rear axle, 6201RS bearings, axle nut/bolt; 12mm diameter; 270mm length |
| CILOYU 14mm 325mm Rear Axle Kit CT200U | CILOYU | Coleman CT200U | Rear axle with 6202RS bearings; 14mm diameter; 325mm length |
| CILOYU 12mm 270mm Rear Axle + Front 225mm CT100U | CILOYU | Coleman CT100U | Rear 270mm and front 225mm axles; durable steel; CT100U compatible |
| CHANGCHENG 14mm x 330mm Rear Axle Kit CT200U | CHANGCHENG | Coleman CT200U / MB200 / MB165 | Wide compatibility; 14mm diameter; 330mm length; includes chain adjusters |
| CILOYU 14mm 325mm Rear Axle Kit + 255mm Front CT200U | CILOYU | Coleman CT200U | Rear 325mm and front 255mm axles; steel construction; 15mm chain adjuster |
CILOYU 12mm 270mm Rear Axle Kit CT100U
This rear axle assembly is designed for Coleman CT100U minibikes. It features a 12 mm diameter rear axle with a 270 mm length and includes 6201RS wheel bearings, an axle nut, and an axle bolt, forming a complete replacement kit. The kit uses premium steel for durability, and the bearings are chrome steel with rubber seals to resist dirt, mud, and water in all-weather riding. Compatibility notes indicate it fits CT100U and may require modification for other minibikes due to length differences. Installation typically restores smooth rotation and reduces friction during operation.
CILOYU 14mm 325mm Rear Axle Kit CT200U
This rear axle kit is tailored for Coleman CT200U minibikes, featuring a 14 mm diameter and a 325 mm length, paired with a 6202RS rear wheel bearing kit. The kit uses premium steel parts and chrome steel bearings with rubber seals to keep out dirt, mud, and moisture. The bearings support smooth, low-friction rotation, efficiently transferring kinetic energy through the wheel and axle system. Note that this product is specified for CT200U, and compatibility with other models is not guaranteed.
CILOYU 12mm 270mm Rear Axle + Front 225mm CT100U
This kit includes both rear and front axles for Coleman CT100U: a 12 mm rear axle at 270 mm length and a 225 mm front axle. Constructed from durable steel, it aims to provide a reliable replacement solution where the rear axle is 12 mm and 270 mm, with the front axle designed to be compatible with CT100U models. The kit claims smooth operation with reduced friction, helping restore steering and wheel alignment after axle wear or damage. Modifications may be necessary when fitting to other minibike models.
CHANGCHENG 14mm x 330mm Rear Axle Kit CT200U
The CHANGCHENG rear axle kit is designed for CT200U and similar Coleman mini bikes, featuring a 14 mm diameter and 330 mm length. It includes sealed 6202RS bearings and chain adjusters for easy installation and proper chain alignment. The kit emphasizes wide compatibility across CT200U, CT200u-ex, MB200, MB165 models, and similar 50cc-125cc minis. The bearings are rubber-sealed to resist dirt and moisture, ensuring smooth operation in varied weather conditions and rough terrain.
CILOYU 14mm 325mm Rear Axle Kit + 255mm Front CT200U
This CT200U-oriented kit includes a 14 mm rear axle at 325 mm plus a 255 mm front axle. Made from durable steel with chrome steel bearings and rubber seals, the kit aims to reduce friction and ensure smooth rotation. It is marketed specifically for CT200U, so compatibility with other Coleman mini bikes is not guaranteed. The set also mentions a 15 mm chain adjuster to help maintain proper drive tension after installation.
Buying Guide
Key purchase considerations when selecting a mini bike rear axle kit include model compatibility, axle diameter, and axle length. Coleman CT100U typically uses 12 mm rear axles, while CT200U models use 14 mm rear axles. Confirm whether you need a rear axle only or a combined front and rear kit to restore full wheel alignment. Bearings matter: 6201RS and 6202RS denote different bearing sizes that affect fit and load capacity. Rubber seals protect the bearings from dirt and moisture, which is critical for off-road riding.
- Model compatibility: CT100U parts usually fit CT100U, while CT200U-focused kits are designed for CT200U and related variants. Some listings warn that parts may require modification if used on other minibikes.
- Diameter and length: Ensure the axle diameter matches the hub and fork inner bore. Verify the length to avoid insufficient engagement or interference with chain and chain adjusters.
- Bearings and seals: Sealed bearings (e.g., 6201RS, 6202RS) protect against dirt. Chrome steel bearings tend to offer durability in cross-country or rough terrains.
- Front and rear kits: If your bike needs alignment across both axles, a combined front and rear kit can simplify installation and ensure correct wheel track and chain tension.
- Installation considerations: Some axles require modification to fit non-original frames. Inspect mounting hardware, nut and bolt sizes, and thread directions before purchase.
- Durability and warranty: Heavy-duty steel axles deliver longer service life under harsh riding conditions. Check warranty terms and seller support for replacement parts.
Comparison at a Glance
Across the five selected products, the key differences lie in axle diameter (12 mm vs 14 mm), axle length, and whether the kit includes only the rear axle or a combined front/rear package. CT100U-focused options emphasize 12 mm rear axles with shorter lengths, while CT200U options prioritize 14 mm axles with longer measurements and often include a front axle. Bearings vary between 6201RS and 6202RS, with rubber seals for weather resistance. When choosing, match the kit to your bike model, confirm the exact axle length, and ensure the included bearings are compatible with your hub design.