TREK CIRCUIT WAVECEL ROAD HELMET DARK STAR Size:XL Easily change button function with

Easily change button function with the E-TUBE app

Its Axial Clutch V2 technology reduces drag and lowers friction

This kit is compatible with all SRAM hydraulic brakes

Axle: Hollow Steel

TREK CIRCUIT WAVECEL ROAD HELMET DARK STAR Size:XL Easily change button function withIf you get just one helmet, make it this one. Whether your finish line is on the race course or your front door, Trek Circuit WaveCel delivers the performance, comfort and tech to be your go to helmet. It's equipped with features that any rider will appreciate, like WaveCel technology, a BOA Fit System and Blendr mount systems. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Trek exclusive technology disrupts the