Maintain your Aventon ebike with the Aventon Mechanical Brake Caliper Hardware Pack. Ensure optimal braking performance and safety with this high-quality, durable, and easy-to-install hardware set. Includes: 2 M6 bolts or 2 M6 bolts w/adapter depending on bike choice in the dropdown Specs: +20mm spacing Quantity 1 is enough to mount 1 caliper on your bike