TRP

B4 Rear IS Disc Brake Adapter - 180mm

The TRP B4 Rear IS Disc Brake Adapter - 180mm provides a clean, secure way to mount a 180mm rotor to frames using an International Standard (IS) rear brake mount. Built for precision and reliability, this adapter ensures proper caliper alignment for consistent braking performance and even pad wear.

Designed specifically for TRP disc brake systems but compatible with most standard setups, the B4 adapter is machined to tight tolerances for a solid fit and dependable performance on every ride. Whether upgrading to a larger rotor for more stopping power or replacing a worn component, this adapter keeps your brake setup dialed in for confident control on the trail or road.

• Allows installation of a 180mm rotor on IS rear brake mounts
• Compatible with most TRP and standard disc brake calipers
• Precision-machined for accurate alignment and reliable braking
• Durable construction stands up to demanding riding conditions
• Essential for riders increasing rotor size for stronger stopping power