Piston Pro Add On wheel bag Shimano's Hollowtech II technology provides

Shimano's Hollowtech II technology provides the best balance of stiffness

modern tire sizes

and Vibration Losses

Optional drivers allow other brand cassettes to be used

Piston Pro Add On wheel bag Shimano's Hollowtech II technology providesWhen you're ready to double up the excitement, effortlessly add up to two extra riders using our 1 Bike or 2 Bike Add Ons. The user friendly modular design makes attaching the additional trays a no brainer. THE PISTON Pro Add Ons, taking you AND your crew to the adventure. 1 Bike add on reduces the capacity to 50lbs per tray 1 Bike add on reduces the capacity to 40lbs per tray Add On racks are not rated for use on an RV