Description: 【Wide Application】: Fits for Quick release (Φ5-100), thru axle (Φ12-100, Φ15-100, Φ15-W110). 【Quality Material】: Versatile Bikes Block is made of aluminum alloy material, solid, stable and long time use. 【With 4 Sets Adapters】: Bike Car Roof Mount Rack All the adapters included in small size allows you take all of them without any burden. 【Bikes Block Fork Mount and Rear Wheel Holder】: Bikes Block Fork Mount and Rear Wheel Holder Stable and enough to lock your bike on the rack without worrying about scratching your car. 【Versatile】: Can be mounted in a garage, home, shed for storage, and mounted in a truck bed, van, or on a trailer for transporting. Specification: Material: Aluminum Alloy Size Chart: Bike Block Fork Mount: 11cmx3.8cmx5.8cm/4.33inchx1.50inchx2.28inch Rear Wheel Holder: 10.8cmx7.5cmx3.5cm/4.25inchx2.95inchx1.38inch Package Includes: 1 Bike Block Fork Mount 1 Bike Rear Wheel Rack Mount 4 Pairs of Adapters 4 x Screws 4 x Sliders 1 Band 1 L Wrench Note: Please allow slightly errors 1-2cm differences due to manual measurement.