• Hyperglide sprockets have a computer-designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load • Close ratio gearing allows more efficient use of energy through finer cadence control • Sprockets are cut away to reduce weight without reducing rigidity • Nickel-plated finish offers hard wearing resistance to corrosion • Corrosion-resistant steel cassette lockring • Cogs: 11-13-15-18-21-24-28T • Durable 7-speed ATB cassette • Compatible with both IG and HG chains • Can be use for 7speed Brompton conversion • Weight: 225g
