The Box Three Crankset utilises a hollow-forged 2-piece design and features an oversized bottom bracket interface. For durability and ease of installation the 24mm spindle is pressed into the drive side crank arm, while the non-drive side crank arm features a 2-bolt pinch system for added strength. The unique 4-bolt 104 BCD SPider features a flex-resistant ring for rigidity and optimum performance. The Box Three Hollow Race Cranks come with an external BSA bottom bracket included. ###section### Product Specs Crank Type: 2-Piece Drive Type: Bolt Drive Spindle Diameter: 24mm Drive Side: Right Side Drive Includes BB Bearings: No Weight: 1010g (35.6oz) ###shogun-image-section### Colour: Black; Size: 175mm, 180mm, 170mm, 177.5mm