CILOYU Mini Bike Disc Brake Kit for Coleman CT100U GMB100 — 180mm Rotor, 7/8" Lever, Rear Caliper

CILOYU Mini Bike Disc Brake Lever Kit is a complete rear-disc braking upgrade designed to replace stock drum or worn systems on Coleman CT100U, GMB100 and compatible mini bikes, delivering stronger stopping power and durable components.

If your mini bike’s original brakes feel spongy or slow to respond, this kit gives you a straightforward bolt-on replacement including a 7/8" lever, cable, rear caliper, pads and a 180 mm rotor. The components are built for frequent use: a steel rotor and abrasion-resistant cable help the assembly resist deformation and fraying while providing a firmer brake pull than many OEM setups.

How does this kit improve braking on a CT100U or similar mini bike?

The kit replaces or upgrades worn drum systems and weak stock components with a disc rotor, rear caliper and thicker brake cable, producing faster engagement and better modulation. Riders will notice a firmer lever feel and shorter stopping distance under identical conditions.

• Includes a 180 mm steel disc rotor for consistent heat resistance and surface contact.
• Rear caliper and two brake pads for even pad wear and reliable bite.
• 61" cable length and 55" sleeve to accommodate typical mini bike routing.

Will these parts fit my mini bike and what are the exact dimensions?

The kit is made to fit many small-displacement mini bikes including Coleman Powersports CT100U, CC100X, Baja Doodlebu DB30, Motovox MBX10/MBX11 and Monster Moto MMB80/MMB105. Check mounting hole spacing and handlebar diameter before ordering.

• Brake lever: 7/8" (22 mm) handlebar clamp size.
• Cable: 61" overall length, 55" sleeve, 4.96" moving length.
• Caliper mounting hole distance: 51 mm (2.01"). Rotor: 180 mm diameter, 37 mm center hole.

What’s included and how easy is installation?

The package contains every primary mechanical part needed to convert or replace a rear disc brake: lever, cable, caliper, rotor and pads. Basic hand tools and a simple mechanical understanding are sufficient for a DIY install; professional help is advised if you haven’t worked on brake systems before.

• Packing list: 1 x 7/8" brake lever, 1 x 61" brake cable, 1 x rear brake caliper, 2 x brake pads, 1 x 180 mm rotor.
• Pre-drilled rotor center and standard caliper spacing match common mini bike hubs.
• Brake lever offers a smooth pull and adjustable reach for rider comfort.

How durable and maintainable are the components?

Components use steel and abrasion-resistant materials for longer life than many stock assemblies, and pads are replaceable when worn. Routine checks of cable tension, pad thickness and rotor trueness will keep braking performance consistent.

• Steel rotor resists warping under normal recreational use.
• Cable construction combines wire rope and rubber jacket for abrasion resistance.
• Replaceable brake pads simplify maintenance and reduce long-term cost.

Who is this for: Riders who own small-displacement or youth mini bikes like the Coleman CT100U, Motovox MBX series, Baja Doodlebu DB30 or Monster Moto models and want a noticeable upgrade in rear braking response without a full custom fabrication. It’s ideal for DIY mechanics, hobbyists restoring a bike, or anyone replacing a damaged or inefficient rear brake system. Before purchasing, verify that you need a rear caliper (this kit contains a rear-specific caliper) and confirm the listed measurements match your bike’s mounting points and handlebar size. If uncertain, compare the 51 mm caliper mount spacing and 180 mm rotor diameter against your current hardware or ask a technician for fitment help.