Features: Lightweighted threefold-stratified-chainring crankset with 24/34/42T aluminum blend design, offering 40% weight reduction vs steel and improved climbing efficiency for 8-speed . exactness-machined 3x8 speed suited chainrings, shape steel 170mm levers, and flight-related-grade counter-wear approach for long-enduring trail durability. Ensures smooth and genuine shifting across abrupt ascents, technical alley, and city-based commutes for efficiency-aimed cyclists. Mud-shedding chainring configuration and multi-condition diabrosis resistance support long-lasting difficult environment and toughness biking in all conditions. Easy installation on most 7/8-speed with common bottom mount suitability; requires any tailored devices. Specifications: Substancemail: Aluminum alloy Sizemail: 26x17.5cm Characteristicsecond: Small three pieces/big three divisions Applicable circumstancesecond: cycle shop, cycle modification Package Includes: Small three-piece crank with tooth disc Crank 1 note: Manual measurement of dimensions with errors