Cube reaction hybrid hpa race 500 e bikeno trail is too long no mountain too high for the reaction hybrid hpa race whether its a ride with the family or a flat out blast on your favourite trails with your riding buddies youll discover a new appreciation for mountain biking with this bike combining human power with the bosch cx motor delivered to the rear wheel via an aluminium superlite frame and a shimano xt 11 speed transmission results in a riding experience in a class of its own av