ZDD With pads on the bottomMade of plastic, it's durable and lightweight, with pads on the bottom, the wheel riser can protect you form slipping and your floor from damage at the same time. ParameterSize: 22.8* 11.8 * 5.7cm / 8.97'' * 4.46'' * 2.24''. This item is designed for better indoor cycling training, it rises the front wheel to keep bike parallel to the floor and straight for stable and safe cycling. Anti-slippingPads on the bottom protect your floor form damage during training. Anti-slipping design, keeps you secure. Wide applicationThe groove fits most sizes of bikes, road bikes, mountain bikes. This is ideal for indoor bicycle training. Package Included:1pcs*Cycling Front Wheel Riser