BOX Components have hit the sweet spot for cranks with these hollow forged BOX Four Crankset series with both size(s) and price. Available in 160, 165 and 170mm lengths, we have been waiting for a crankset that matches the expectations of riders looking for a strong set of cranks that won't break the bank. Features Cold Forged Construction 4-bolt 104 BCD Spider 24mm chromoly spindle 6061 T-6 Aluminum External BSA BB Included Dual pinch bolts for even clamping force Laser-etched graphics Size: 160, 165, 170mm Color: Matte Black 5mm thickness at chainring bolt Includes: (1) External BSA Bottom Bracket (2) Pedal Washers (Required) BCD 104mm Material 6061-T6 Aluminum Length 160, 165, 170mm Finish Matte Black Includes: (1) External Euro/BSA Bottom Bracket (2) Pedal Washers (Required)