For 1x narrow wide chainring, square, 175 mm, 104 mm BCD. No chainring included

For 1x narrow wide chainring, 104 mm BCD, hollow 24 mm axle, 175 mm crankarms, compatible with Shimano Hollowtech II bottom brackets, includes First bottom bracket

For 1x narrow wide chainring, square, 175 mm, 104 mm BCD. No chainring included. 100 mm B.B shell