Just Pedal:The Apex 1 crankset completes the Apex 1 group, SRAM’s most affordable road 1x™ drivetrain yet. Using patented X-Sync™ technology, the Apex 1 crankset runs silent and secure. Riders looking for a wide gear range and shifting simplicity at a great value will find it in Apex 1.Things To Remember:SRAM 1x™ road 10-speed and 11-speed compatible,24 and 30mm spindles, compatible with GXP®, BB30, PressFit 30™, and PFGXP,Compatible with 130 and 135/142 OLD frames,Available with 40T, 42T, 44T chainrings,Chainguard option,Aluminium chainring and crankarms,.Key Features:Patented X-Sync™ chainring technology provides unparalleled chain retention as part of a complete SRAM 1x™ system,Integrated 4-arm, asymmetric spider maximizes stiffness to weight,Greater frame and tire clearance than other road cranks, 2mm per side,.Specifications:Speeds: 10/11,BB Compatibility: GXP/PF GXP 68mm,Chainring Size: 42,Crank arm length: 165mm, 170mm, 172.5mm, 175mm,Chainline: 45.5mm,BB Spindle Interface: 24mm,Chainring material: Aluminium,Guard: No Guard,Bolt Circle Diameter (BCD): 4-Bolt 110 BCD,Crank arm material: Aluminium,Colour (Crank arm): Black.