- Piston Pro X Add On expands the capacity of the Piston Pro X Base to carry 4 bikes
- Quick change from 2 to 4 bikes
- 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