Aero Kool Disc Brake Pads Stumpjumper Trek's exclusive ThruShaft design responds

Trek's exclusive ThruShaft design responds to changes in terrain faster than any other shock on the market

Kona Mocha flavor includes 25mg of caffeine

5 inch to 1-1/8 inch steerer tube has the optimal balance of stiffness

Woven outer-shell is combined with 90g Polartec® Alpha® breathable insulation to create the ultimate packable

Aero Kool Disc Brake Pads Stumpjumper Trek's exclusive ThruShaft design respondsKool Stop Aero Kool disc brake pads are made with a forged aluminum cooling pinned backing plate and a high performance organic compound. These pads greatly reduce heat build up in the braking system and provide superior, lasting brake power. Fits Avid Elixir R, CR, 3, 7, 9, World Cup and XX