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- Compatibility: 130 BCD 5-bolt road chainring for 7 8 9 speed drivetrains; Compatible with Shimano; Compatible with SRAM; Compatible with Campagnolo; verify 130 mm BCD and 5-bolt pattern before purchase. - Construction: Aluminum alloy with precise tooth profile for smooth shifting and stable cadence on flat or rolling routes. - Size and Install: 42T with 10 mm bolt holes; mounts to standard 130 BCD spiders; reuse existing hardware; chainring bolts not included. - Performance: Refreshes worn front ring to improve pedaling feel for commuting, fitness training, touring, and indoor trainer use. - Fit Guidance: Confirm 130 mm bolt circle and 5-bolt spacing on your crank; 42T tooth count balances speed and cadence for city rides and group training.