SRAM Apex 1 GXP Road Single ChainsetThis SRAM GXP chainset sits within the Apex family and is perfect for converting your traditional 2x setup to 1x. Its 10 and 11 speed compatible and suitable for Gravel, Road and Cyclocross use.Specifications:Arm Material: AluminiumChainring Material: AluminiumChainring Tooth Count: 42TSpeed: 10/11Bolt Circle Diameter (BCD): 4-Bolt 110 BCDBB Spindle Interface: 24mmQ Factor: 149mmChainline: 45.5mmTechnology: GXP BB, X-Sync™ chainringsCompatible with 130mm, 135mm and 142mm OLD framesGreater frame and tyre clearance than other road cranks, 2mm per sideIntegrated 4-arm, asymmetric spider maximises stiffness to weight ratioTechnology:X-Sync™ chainring - SRAM's X-Sync™ 1x chainrings provide the highest level of performance and durability. Tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. Their sharp and narrow tooth profile and their rounded chamfer edges help to manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC™ chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC™ rings are an integral part of the SRAM 1x™ drivetrain.