SunRace CSMZ903 Cassette - 12-Speed 11-51t Black Chrome Teeth-50/34 Features an innovative chain retention

Features an innovative chain retention hook which locks tool onto cassette ensuring full chain wrap and eliminating slippage

The instep strap helps improve fit for those with heel slip

Features an integrated purist rear light made by Trelock powered by AC Dynamo current for use with Dynamo equipped hubs

Built with DT Complite spokes featuring a unique blading process to create a durable spoke that's made to last Rear Axle 12mm Thru x 148mm Rim Width (Internal) 30 Cassette Body Type Shimano Micro Spline Valve Presta Color Black Wheel Size 29" Designed for ebike Yes Defined Color Black ISO Diameter 622 / Road / 29" Tire Type Tubeless Ready Clincher Rim Material Carbon Hub/Brake Compatibility Center-Lock Disc

2-bolt cleat mount Shoe Size (EU) 47 Gender/Age Unisex Color Black Toe Spike Compatibility Yes Defined Color Black Cleat Bolt Pattern 2-Bolt Closure Dial/Velcro Activity Cycling Size 47

SunRace CSMZ903 Cassette - 12-Speed 11-51t Black Chrome Teeth-50/34 Features an innovative chain retentionThe SunRace MZ 12 Speed Cassette offers a wide ratio design. Range 11 51 Cogs 11 13 15 17 19 21 24 28 33 39 45 51 Cassette Body Type Shimano HG Drivetrain Speeds 12 Color Black Chrome Weight 497 Defined Color Black