Usage Tips: Features: Safely transport your bike(not included) secured by the rear wheel in your truck bed or car roof. Aluminum alloy base and plastic,hard structure and heavy bearing. Adhesive fastener strap to fix your bike rear wheel on your car or truck. Crank fastener strap to safely fix the crank and prevent it from moving during transportation. Provided hardware for easy installation and removal. Specification: Material: Aluminum alloy + Plastic + Nylon Size: 109*74*45mm / 4.3*2.9*1.8in Weight: approx. 214g / 7.6oz Package size: 135*80*80mm / 5.3*3.1*3.1in Package weight: approx. 248g / 8.8oz Package List: 1* Bike Rear Wheel Mount (with an Adhesive Fastener Wheel Strap) 1* Set of Hardware 1* Adhesive Fastener Strap (for Crank) NOTE: We suggest that it is better to use with front fork mount(need to buy separately) on tne same time,which is more secure and firm during transportation.