1、Tires Width Up To 1.1in: Fits most road bike tires, tires width up to 1.1in. Base provides extra grip to hold onto the floor, prevents slipping and vibration, make indoor bike training more comfort. 2、Anti Skid: Front wheel riser block increases stability and achieves level riding position. The skid resistance design could also keep you safe and your bike steady, and avoid any damages may caused on your floor. 3、Plastic Material: Bike front wheel riser block is made of plastic, ensures stability and durability through continuous usage. Use it without the worry that it might suddenly break and cause unexpected scenarios. 4、Indoor Riding Training: Lightweight, compact and easy to carry for bike training. This riser block is the best gift idea for cycling enthusiasts. It's the must have accessory ensuring a smooth ride. 5、Applicable: The front wheel riser block for indoor bicycle trainers can compatible with most type bike trainer stand, and suitable for road bike. Obtain better effect for riding training. Item Type: Bike Front Wheel Riser Block Material: Plastic Weight: Approx. 144g / 5.1oz Applicable: Road Bike Product Size: Approx. 150x240mm / 5.9x9.4in Tire Width: up to 28mm / 1.1in 1 x Bike Front Wheel Riser Block 4 x Washers