Please note If there is a gap after installing the crank, please use the bottom bracket (bottom axle) spacer to adjust the gap (this issue is common with lock-on cranks) because each frame width is different, so using the bottom bracket spacer is necessary to adjust the gap Product Specifications Crank material: Aluminum alloy AL-7075 DUB axis material-aluminum alloy AL-7075 Chain link material - Aluminum alloy AL-7075 Support speed - 8-11 speed chain Chain link offset - 3mm Chain link screw (9n.m) Crank length-165/170/175mm Chain link color - black/titanium color Crank color-black/titanium (polished) Chain Ring Model - Compatible with 3 Bolt Direct Installation Chain Ring Interface Chain line - Chain center line: 49mm/52mm (Boost) BB spindle-axis: 29mm Bottom bracket weight - 97 grams Spindle length - 130mm----Suitable for 68mm/73mm bottom bracket BB Compatibility-Axle Compatibility: BB- BSA29mm /BB89.5-29mm/ BB92-29mm/ PF30-29mm/BB30-29mm Weight: 585g (170mm crankshaft set + shaft + screws) Chain link weight: 32T (63g), 34T (71g), 36T (64g), 38T (75g) The EVOSID crank is specifically designed for riding through forest trails, endurance races, parks, and DH-style grids. Perfect for steep technical sections, turning in local parks, or practicing your favorite pump track. Our lightweight crank arms reduce the impact on technically difficult climbing pedals, allowing you to tackle more race sections and start a lap again with less effort. DUB 29mm axis With its powerful DUB axle, the axle is stronger and more robust, allowing you to tackle more complex road conditions with ease 7075 aviation grade aluminum alloy The processing material is 7075 aluminum, which is a heat-treatable reinforced alloy with high hardness and strong corrosion resistance. Compared with 6061 aluminum alloy, it has higher stability and lighter weight GXP Direct Installation Format Suitable for SRAM GXP 3-bolt direct mount, easy installation, more convenient to replace chainrings, compatible with 99% of market 3-bolt chainrings Lightweight Both the chainring and crank are designed with hollow holes, which not only reduces weight but also adds a beautiful appearance. Narrow Wide Tooth Design The narrow and wide tooth design prevents chain slippage. The thick and thin narrow and wide tooth design reduces the gap between the chain and the chainring, allowing for a tight fit with the chain card, thereby significantly preventing vibration caused by shifting. CNC Pin Marking LOGO LOGO adopts CNC milling. Compared to traditional laser printing LOGO, CNC milling can retain the LOGO for a longer time, making it more aesthetically pleasing and not fading