Promax DSK-300 Post-Mount Mechanical Disc Brake Caliper euro-19mm-22mm *Sized to fit rings with

*Sized to fit rings with an outside diameter of 41-44mm

The Rennen Chainring-4-Bolt at J&R Bicycles is made from airplane-grade 7075-T6 aluminum alloy which is 83-percent stronger than the standard 6061-T6

RIDER WEIGHT LIMIT: NONE

Safety first

4 x 150mm (Mini

Promax DSK-300 Post-Mount Mechanical Disc Brake Caliper euro-19mm-22mm *Sized to fit rings withThe Promax DSK 300 Post Mount Mechanical Disc Brake Caliper is an affordable yet high quality upgrade to keep your braking system at top performance. Made with a lightweight aluminum alloy caliper body and swingarm which allows for efficient stopping power without much added weight. Convenient pad adjustments are possible via an inboard dial or barrel adjuster. For easy maintenance, this caliper is compatible with Avid BB5 brake pads and also is