When it’s time to double down on the fun, quickly add up to two additional riders with our quickconnect™ 1-bike or 2-bike add-ons. The modular design makes attaching the additional trays super simple. Even easier than that? The lights automatically connect. FEATURES 1-Bike Add-On: Quick change from 2 to 3 bikes 2-Bike Add-On: Quick change from 2 to 4 bikes Quick change from 2 to 3 bikes or up to a max capacity of 4 bikes 1-Bike Add-On holds up to 50 pounds per tray 2-Bike Add-On holds up to 40 pounds per tray Wheelbases up to 53" tires as large as 5" Compatible with 2” Piston™ Pro X Compatible with Pivot v2 Compatible with e-bike ramp Only one add-on can be used at a time WEIGHT 1-Bike Add-On: 26lbs 2-Bike Add-On: 48lbs CARRYING CAPACITY 1-Bike Add-On increases 2” Piston Pro X carrying capacity to 3 bicycles weighing up to 50 pounds each 2-Bike Add-On increases 2” Piston Pro X carrying capacity to 4 bicycles weighing up to 40 pounds each MODEL: PXA1G Piston™ X 1 Bike Add On MODEL: PXA2G Piston™ X 2 Bike Add On