Tektro R539 Rim Brake Caliper Set - Black (47-57mm Reach) bikebox With an IK09 impact rating

With an IK09 impact rating and IP67 water/dust protection

Our signature wrap-around design

Zona simplifies setup

A major innovation compared to the previous Di2 variants is the elimination of the central power supply

#2 Phillips / Flat Head

Tektro R539 Rim Brake Caliper Set - Black (47-57mm Reach) bikebox With an IK09 impact ratingThese dual pivot Tektro brake calipers are designed for wide tyres! The R539 is a dual pivot caliper brake with a 47 57mm reach, featuring forged aluminum arms for strength and durability. It provides smooth and responsive braking performance, ideal for road bikes Brake Type: Dual Pivot Rim Pull Ratio: Short Reach: Mid 47 57mm Pads: P422 adjustable angle cartridge Weight: 160 grams per caliper