172.5mm cranks, 110 BCD. Compatible with 68mm GXP bottom brackets. Very good condition. Protective film installed on crank arms. This chainring does not support flattop chains, but compatible with 11 or 12 speed non-flat top (eg: Sram Eagle). Great for gravel or cyclocross CX bikes. This can be converted to 2x as well, which is what these cranks were set up as originally. I converted it to 1x for a cross bike I rarely ride.