In 2016, TRP began working with reigning world cup champion Aaron Gwin. Out of the gate, he was impressed with the initial level of performance, but he did have a list of improvements needed to achieve world cup winning performance. Working closely with the TRP development team, improvements were made in nearly every part of the brake and tested on the world cup circuit throughout the season. TRP then carried some of these changes over to the Slate trail brake. The Slate T4 is made from cast aluminum with a clean black finish. It also features the new drilled and dimpled lever blade, designed by Aaron Gwin. Riders will also find benefits in the four piston caliper, tool-free reach adjust, and top loading caliper.