SRAM Apex 1 Crankset - 165mm 10/11-Speed 42t 110 Asymmetric BCD GXP Spindle Interface Black. This affordable crankset includes the features that make SRAM 1x road cranks popular: patented X-Sync chainring technology and above-average tire and frame clearance. Integrated 4-arm asymmetric spider maximizes stiffness-to-weight ratio. Includes SRAM X-SYNC chainring SRAM, Apex 1, Crankset, 10/11 sp., 172.5mm, 42T, BCD:110, GXP, 45.5mm, Black