Middleburn cranks were first developed in 1991 and since then the cranks have undergone many refinement while retaining their legendary stiffness and light weight. The cranks are hot forged from 7075 T6 aluminium and CNC machined, hand polished and anodised before being re-machined with the Middleburn logo.

The RS7 cranks are compatible with JIS square taper type bottom brackets. 

Weight 434g for 175mm including lock ring. 

Use a 118mm bottom bracket for a 50mm chainline