The whyte 909 hardtail mountain bike 2017 takes a simplistic yet effective approach to the trail hardtail the 900 series award winning geometry teams up with a durable spec that39s ready for anything creating a playful and highly capable riding style that is at home on the trails a 6061 hydro formed t6 aluminium has been used for the frame of the 909 complete with new bbx internal cable routing and a 12mm bolt through 148mm boost rear axle giving extra stiffness and increased chain