•Enhance your road cycling performance with this 9-speed cassette, offering seamless gear transitions and optimal power transfer for a smooth and efficient ride •This cassette provides a wide range of gear options to tackle various terrains and gradients, ensuring you're equipped for both flat stretches and challenging climbs •High-tensile steel plate nickel-chromium treatment, hollow design, reduce weight •The surface is specially treated to make it have strong oxidation resistance, prevent cassette from rusting, longer service life Specification: •Material: Steel •Model: 9 Speed 11-30T/9 Speed 11-34T •Applicable: road bikes, mountain bikes, folding bikes •Teeth Ratio: 11-13-15-17-19-21-23-25-30T 319g Applicable: road bike/folding •Teeth Ratio: 11-13-15-17-19-21-24-28-34T 327g Applicable: mountain bike Package included: •1 x Speed Bike Cassette