PROFILE DESIGN 52 ASA ALUMINIUM EXTENSIONS discount_processed The 40-Series headset delivers exceptional

The 40-Series headset delivers exceptional performance and reliability for road

Compatible with the A3 Riser system

the Di2 SW-RS801-S for on road bar brings lightning fast shifting to the tops of any Shimano 12-speed road bike

Matching the Shimano GRX cranksets

Soft layer on the palm for more comfort

PROFILE DESIGN 52 ASA ALUMINIUM EXTENSIONS discount_processed The 40-Series headset delivers exceptionalIntroducing the 52ASA the next evolution of our wildly popular Aero Shaped Carbon (ASC) extensions, now available in a sleek, high performance aluminium. Crafted with an advanced multi stage forming process, the 52ASA brings the same arm hugging benefits of our iconic shaped extensions, all at a more affordable price. Designed for cyclists seeking aerodynamic advantage without the premium carbon price tag, these extensions deliver the ergonomic