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Rounded rear profile to facilitate comfortable left and right movement
Special hardened steel
Drift and over axle set for less common thru axle hube and frame bearings
Recommended Brake kit: M9120/M8120/M7120
Trek Circuit WaveCel Helmet S/M Rounded rear profile to facilitateWhether 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 safety standards that the industry has
