No other crankset in the world is as efficient as the Sugino 75 at power transfer. The 75s have proven themselves to the world in World Cup races, and by the abusive riding of bike messengers. NJS stamp of approval shows you are getting the best. Uses ISO square taper cranks, requires Sugino 75 109mm bottom bracket. Comes in silver, black, blue, purple, red, gold, and green; only in 165mm.