Cold-forged alloy track crankset in 144bcd. Available in 165mm in silver, black, red, gold, blue, purple, and green. Silver is also available in 160, 167.5, 170, 172.5, and 175mm. Square taper (JIS) for BB spindle length of 107-110.5mm depending on chainstay clearance. Includes 48t 1/8" alloy chainring.