Features14 Different Heights: There are 4 heights of the bicycle front wheel fixation, 85mm/3.3in, 70mm/2.8in, 60mm2.4in, 50mm/2.0in, which can meet the needs of different slope 2Prevent Injuries: Uses an embedded anti skid adhesive design, which greatly guarantees the stability of the cycling. 3Useful Tool: Suitable for indoor bicycle training, it can raise the front wheel, keep the bicycle fluently straight with a better training effect. 4Strong Material: Adopted PC + ABS material, that the riser block is sturdy, high strength, wear resistant, suitable for long term use. 5Easy to Use: Bike wheel riser block supports quick release that you will not get stuck during use, the weight will make the riser block more stable.SpecificationItem Type: Bicycle Front Wheel RiserMaterial: PC + ABSApplication: for Indoor Bicycle TrainingProduct Size: Approx.240x115mm/9.4x4.5inHeight: 85mm/3.3in, 70mm/2.8in, 60mm2.4in, 50mm/2.0in(Manual measurement, allowing 1-2cm error)Weight: Approx.600g/21.2ozPackage List1 xBicycleFrontWheelRiser