Key benefits Improved chain retention: Narrowwide 40T chainring reduces chain drops and improves pedaling confidence on rough terrain. Lightweight performance: Chainring weighs about 45 g and the 104 BCD ultralight crankset weighs about 609 g, reducing rotational mass for more responsive acceleration. Durable and reliable: Designed as a replacement for Shimano, SRAM, and FSA components and built to last for daily riding and offroad use. Easy installation: Square taper crankset design is simple and reliable; if you can use an Allen wrench, you can install it quickly. Main specifications Chainring options: 40T available in Round or Oval profiles. Narrowwide tooth design: Overall thickness 4 mm; narrow tooth width 1.9 mm, wide tooth width 3.7 mm. Crankset BCD: 104 BCD ultralight mountain bike crankset. Weights: Chainring about 45 g; crankset about 609 g. Compatibility: Replacement for Shimano, SRAM, FSA. Suitable for mountain bikes, commuter bikes, and electric bikes. Function and performance The narrowwide tooth profile secures the chain for singlespeed and 1x drivetrains, reducing chain drops without a clutch derailleur. The ultralight 104 BCD crankset balances low weight with durability for reliable power transfer on climbs and sprints. Round and oval chainring options allow riders to choose a pedaling feel that matches their cadence and terrain. Easy to fit Square taper interface keeps installation straightforward and serviceable. Requires standard Allen wrench tools for mounting the crankset and chainring bolts. Package contents 1 PC MTB crankset 1 PC mountain bike singlespeed chainring (40T, Round or Oval as selected) 4 PCS chainring bolts Typical use scenarios Trail riding: worn drivetrain parts to improve chain retention and reduce drops on technical singletrack. Daily commuting: Lightweight, durable setup for reliable performance and lower maintenance on city rides. Ebike or fitness upgrades: Use as a replacement or upgrade for Shimano, SRAM, or FSA systems to improve pedaling efficiency and durability on assisted rides. Compatibility note: Designed for 104 BCD setups and as a direct replacement for Shimano, SRAM, and FSA cranksets where square taper interface and 104 BCD chainrings are specified. Ensure your bike's BCD and crank interface match before .