Shimano Tourney FC-M171 Crankset 6/7/8 Spd Black 175 mm 48/38/28 CS2U | eBay
The Bike Shop - Shimano- Crank M171, w/ CG, w/o Bolt Model No. FC-M171 Rear Speeds 8/7/6 Chaining Combination 42-34-24T Spider or Gear Arm 4 Arm PCD (mm) Riveted Crank Arm Length (