Compatible with 2" HighNoon FC to expand carrying capacity to 3 bikes, or HighNoon FC Solo to expand capacity to 2 bikes. Lowers max weight capacity from 60 lbs per bike to 45 lbs per tray. No contact with frame, secures bicycle by front wheel. Carries road tires up to 5. 0" fat bike tires, and diameters from 20" to 29". compatible with bicycle wheelbases from 34" to 52". Rack weight 14lbs (shipping weight 20lbs)