Finding the right rear axle for a trike motorcycle or adult trike is essential for stability, ride quality, and safety. This guide highlights five relevant rear axle options, explains who each product is best for, and helps you compare features side by side. Whether you’re converting a bicycle into a trike or replacing a worn axle on your three-wheeler, this introduction clarifies choices and trade-offs for common wheel sizes and mounting styles.
Overview of top picks at a glance. The following table summarizes core details to help you decide quickly which axle fits your build or restoration project.
| Product | Best For | Axle Diameter | Notes |
|---|---|---|---|
| Trike Rear Axle, 7 Speed Conversion Kit | Adult trikes converting bicycles | 15 mm (≈5/8 inch) | High carbon steel; fits hollow-hub wheels |
| WEEROCK Tricycle Rear Axle Kit | 20–26 inch trikes; single or dual speed | 5/8 inch (≈15.8 mm) | Fits hollow-hub wheels; band brake option |
| SUN BICYCLES Trike Replacement Axle | Sun Trike models; standard replacement | 14.8 mm | Comes with two nuts |
| WEEROCK Rear Axle Kit (Second Listing) | Similar multi-size trikes; preferred for compatibility | 5/8 inch | Black finish; conversion kit |
| Go Kart / ATV Rear Axle Assembly Kit | DIY rebuilds and custom trikes | 32 inch overall length axle assembly | Includes hub, chain, brake components |
Trike Rear Axle, 7 Speed Conversion Kit
Best for: Adults upgrading a bicycle into a three-wheeled rider. This 7-speed kit uses a 15 mm (about 5/8 inch) rear axle and is designed for hollow-hub wheels. The kit’s material is high carbon steel, offering a balance of strength and stiffness for cruising and commuting. Choose this if you plan a low-maintenance conversion with simplified gearing.
Why selected: The kit specifically targets 20″–26″ wheels common on adult trikes, making it a straightforward choice for converting a standard bike to a trike. The 15 mm axle size aligns with typical hollow hubs used in many adult trikes and some motorcycles-based adaptations.
Best for: Riders who want a multi-speed option within a trike-conversion framework and who have compatible hollow hubs. Caution: Ensure your wheel’s hub is hollow and compatible with a 15 mm axle to avoid fit issues.
WEEROCK Tricycle Rear Axle Kit — 20 to 26 Inch
Best for: Those upgrading 20″, 24″, or 26″ adult trikes with a single or seven-speed configuration. The axle diameter is 5/8 inch (15.8 mm), designed to fit hollow-hub wheels, with a band brake option noted. This makes it versatile for older or budget-conscious builds and replacements.
Why selected: The kit’s axle diameter and wheel size range cover common trike configurations, improving compatibility for existing frames. The inclusion of a band brake option adds braking versatility for certain wheel setups.
Best for: Builders who want a straightforward replacement that fits a broad range of standard trike wheels. Caution: Verify brake type compatibility and hub design on your frame before ordering.
SUN BICYCLES Trike Replacement Axle
Best for: Sun Trike models requiring a replacement axle with a near 15 mm dimension, and those seeking a simple, standard axle setup. The listing notes the replacement uses current 15 mm axles on all trikes, reinforcing its broad compatibility for Sun models.
Why selected: This option is a practical replacement for Sun Trike users, offering a straightforward path to restoring a trike’s rear axle function without custom fabrication.
Best for: Owners of Sun Trikes looking for an official-style replacement. Caution: The axle is specified for Sun Trikes; verify model compatibility if you are adapting a non-Sun frame.
WEEROCK 20/24/26 Inch Tricycle Rear Axle Kit (Second Listing)
Best for: Similar use as the first WEEROCK listing, ideal for multi-size trikes that may require quick axle replacement or conversion flexibility. The kit focuses on a 5/8 inch axle and a black finish, suitable for a stealth or matte aesthetic on many frames.
Why selected: Its recurring presence in the market provides a familiar compatibility profile for consumers replacing in-place hardware without major frame changes. Caution: Confirm axle and brake compatibility with your current hub arrangement.
Replacement for Go Kart ATV 32 Inch Rear Axle Assembly Kit
Best for: DIY rebuilds and custom trike projects that require a longer axle assembly. The kit includes the axle, hub, chain, brake components, and related hardware, designed for 32-inch applications. It suits hobbyists building or modifying go-kart, ATV, or larger trike configurations.
Why selected: This option expands the size and component set available for projects that go beyond standard 20–26 inch trikes. It enables more ambitious builds or restorations where a larger axle and accompanying parts are needed. Caution: This is a larger, more complex kit; ensure all parts align with your frame dimensions and mounting points.
Buying Guide
What should you check before buying a rear axle for a trike motorcycle or adult trike?
- Wheel size compatibility: Confirm your wheel diameter (20″, 24″, 26″, or other) and match it to the axle’s stated size.
- Axle diameter and hub type: Many trikes use 5/8 inch (15.8 mm) or 15 mm axles with hollow hubs. Ensure the axle type matches your hub’s bore and mounting hardware.
- Brake compatibility: If your trike uses a band brake or needs drum/brake integration, verify the axle’s compatibility with your braking system.
- Material and strength: High carbon steel is common and offers stiffness; assess load expectations and riding conditions when selecting.
- Installation notes: Some kits require additional components (nuts, bolts, spacers, or chain sprockets). Check what’s included and what must be sourced separately.
- Conversion vs. replacement: Conversion kits are convenient for adding gears to a single-speed setup, while replacement axles are best for restoring original performance.
FAQ
- Q: Will a 5/8 inch axle fit all 20–26 inch trikes?
- Q: Can I use a trike axle kit on a standard bicycle frame?
- Q: Do all axles include brake components?
- Q: Is a replacement axle better than a full conversion kit?
- Q: How do I know if my axle is 14.8 mm or 15 mm?
- Q: Are these axles suitable for go-karts or ATVs?
A: Not universally. Check hub bore size and whether the wheel is hollow-hub compatible. Many 20–26 inch trikes use 15 mm (5/8 inch) axles, but verify before purchasing.
A: It’s possible with compatible hub and frame geometry, but most kits are designed for trikes or three-wheeled builds. Confirm frame clearance and mounting points.
A: Not necessarily. Some listings include brake compatibility options or separate brake parts. Review product details to avoid missing pieces.
A: Replacement axles restore original setup, while conversion kits add gearing or adapt wheels. Choose based on your project goals and existing drivetrain.
A: Measure the bore of your wheel’s hub or refer to the wheel’s specifications. Some listings list exact measurements; confirm before ordering.
A: Some kits target larger or different platforms. Verify the kit’s intended application and confirm fit for your frame and mounting points.