NEW TRP Slate T4 Disc Brake and Lever - Rear, Hydraulic, Post Mount, Black pedal_clipless The Tektro R313 road caliper

The Tektro R313 road caliper brake features a dual pivot design

Just like the early 80's MTB pioneers

Rear Derailleur : Shimano GRX RX812

Height-adjustable to accommodate 26-29" wheels

NEW TRP Slate T4 Disc Brake and Lever - Rear, Hydraulic, Post Mount, Black pedal_clipless The Tektro R313 road caliperTRP Slate T4 hydraulic disc brakes are a 4 piston brake system offering excellent braking power in a lightweight package. Features an ergonomic, Aaron Gwin designed, alloy lever with dimpled accents made from cast aluminum Forged and CNCd, 4 piston caliper Tool free reach adjustment Top loading caliper Pads feature a resin compound that has increased thermal stability and shorter bed in process