Standard right side wheel holder for tires up to 3" wide Comes stock on Trail Riders, Sport Rider 2, and Sport Rider SE racks:HR200, HR1000, HR1450, HR1400, HR1475 Wheel holder brace is 1.25 round tubing and is 7" long Wheel holders sets will hold bicycles up to 50 lbs but, only if the rack being used is rated for 50 lb. bicycles. i.e. The Trail Rider rack will only hold bicycles up to 45 lbs. This product is for use with bicycles only. Do not use on motorized or electric bikes; mopeds; or motorcycles.