If you’re upgrading a child’s or casual rider’s bike from a coaster brake to a freewheel system, this guide helps you choose reliable conversion options. The top picks below are best for riders seeking smoother backpedal feel, improved riding dynamics, or easier maintenance. This list favors options compatible with popular kids’ bikes and single-speed frames, plus easy installation guidance. The buyer types most likely to benefit include: parents upgrading a child’s starter bike, cyclists who want backpedal freedom without engaging braking, and hobbyists seeking simpler, cleaner handlebars.
Summary of chosen products
- woom 2 Freewheel Kit — Best for woom 2 owners seeking a seamless, kid-friendly upgrade that preserves backpedal freedom.
- DONSP1986 18T Coaster Hub Sprocket Kit — Best for converting standard coaster hubs to a compact 18T setup on compatible hubs.
- Cloudpower Coaster Brake Hub — Best for single-speed bikes needing a robust coaster brake replacement with a smoother ride feel.
- 2 Pcs Freewheel Hub Discs — Best for DIYers who want flexible freewheel hub adapters compatible with multiple frames.
- Qjaiune Disc Brake Frame Adapter Set — Best for DIY enthusiasts converting or upgrading to disc-brake capable frames and components.
woom 2 Freewheel Kit: Upgrade for Smooth Backpedal
The Woom 2 Freewheel Kit replaces the rear coaster hub with a freewheel hub, enabling backpedaling without brake activation. This kit is designed for woom 2 bikes produced after February 2021. It is best for young riders who need a more responsive ride and who want backpedal control without hydraulic or cable brake interference. The kit offers a seamless conversion that suits families prioritizing a smooth transition from coaster to freewheel while maintaining rider confidence. A potential limitation is compatibility restricted to newer woom 2 models.
DONSP1986 18T Coaster Hub Sprocket Kit
This 18T sprocket kit provides a compact upgrade option for a processed coaster hub, converting to a free-spinning gear setup. The 18-tooth configuration is suitable for simpler gears and predictable pedaling, making it a solid choice for basic conversion projects. Best for riders who want a straightforward upgrade without complex frame modifications. A limitation to note is that compatibility depends on the existing hub design and frame allowances.
RUJOI Disc Brake Conversion Kit
The RUJOI Disc Brake Conversion Kit converts a traditional bike into a disc-brake setup, featuring an aluminium alloy frame mounting bracket with two size options (22mm or 28mm) and a disk rotor adapter. This kit is best for riders who want increased stopping power and future-proofing for frames that support disc calipers. It’s particularly suitable for DIY enthusiasts seeking a robust upgrade. A potential limitation is that it only fits IS-mount calipers and requires careful alignment during install.
Cloudpower Coaster Brake Hub for 36 Holes
This 36-hole coaster brake rear hub is crafted from stainless steel, designed for single-speed bikes, with an 18-tooth sprocket offering smooth pedaling. It provides a straightforward pedal-braking system that favors clean handlebars and simple maintenance. Best for riders who prefer a traditional coaster setup with reliable braking via backpedaling. A caution: some riders report audible braking responses depending on chain tension and frame compatibility.
2 Pcs Freewheel Hubs And Adapters
This set includes two freewheel threaded hubs with aluminum alloy construction. It centers on thread design for straightforward compatibility with braking discs and drums, with a slim 7.5mm thickness for minimal added bulk. Best for DIYers who want flexible, modular pieces to suit different frames and braking setups. A limitation is that precise compatibility depends on frame threading standards and rotor/hub diameter compatibility.
Qjaiune Disc Brake Frame Adapter Mount
This disc brake frame adapter offers a 0.87 inch / 22mm inner diameter and an adjustable bracket design to fit road, MTB, and BMX frames needing conversion to disc braking. Best for DIY enthusiasts converting standard frames to a disc brake friendly configuration. A caution: ensure frame clearance and caliper compatibility before purchasing.
Buying Guide: Key Considerations For Coaster-To-Freewheel Upgrades
- Bike Compatibility: Check hub width, axle length, frame spacing, and existing drivetrain alignment before buying a conversion kit. Some products are frame- and model-specific.
- Brake System Goals: Choose a solution based on whether you want backpedal braking preserved, upgraded stopping power, or a completely new disc brake system.
- Installation Skill Level: Some kits are straightforward plug-and-play, while others require precise alignment, threading, or frame modifications. Consider professional help if unsure.
- Durability And Material: Look for aluminum alloy or stainless steel components for durability under daily use and varying riding conditions.
- Weight And Aesthetics: For youth bikes, lightweight options reduce effort and improve handling. Consider how the upgrade impacts the bike’s balance and look.
- Maintenance Needs: Disc brakes demand rotor care and caliper alignment; coaster-to-freewheel setups often simplify maintenance and tension checks.
Frequently Asked Questions
- What is a coaster brake to freewheel conversion kit?
– It’s a set of components that replaces or bypasses a coaster brake hub to enable freewheeling backpedal and smoother riding dynamics on compatible bikes. - Who should consider this upgrade?
– Parents upgrading a child’s starter bike, riders seeking backpedal freedom without traditional hand brakes, and DIY enthusiasts aiming for cleaner handlebars or disc upgrade compatibility. - Are these kits universally compatible with all bikes?
– No. Compatibility depends on frame design, hub type, axle width, and brake mounting standards. Always verify model-specific requirements. - Do these kits affect safety or warranty?
– Upgrades may affect frame warranties or brake system integrity. Follow manufacturer installation instructions and consult a bike shop if unsure. - Is disc brake conversion necessary for all conversions?
– Not necessary for every bike. If you are happy with the backpedal or coaster feel, a hub replacement or freewheel kit may suffice. Disc brake conversions are best for riders seeking stronger stopping power. - Can I install these parts myself?
– Many kits are designed for DIY installation, but some require precise alignment or professional tooling. If in doubt, seek guidance from a qualified bicycle technician.