In Stock - Ready to Dispatch


CNC Machined Aircraft Grade Aliminum UK Made

Middleburn RS8 cranks come complete with the axle, axle nuts and fittings. The RS8 cranks are for use in the external bottom bracket. The weight of the RS-X-175 cranks are approximately 547g including all fittings. Q factor is approximately 182mm.
Available in lengths of 175mm 170mm and 165mm.


Middleburn cranks were first developed in 1991 and since then the cranks have undergone many refinements. This is the latest mountain bike crank which is designed to work with the external bottom brackets but also with push-fit type bottom brackets with the use of a different axle length. The design is the result of advanced 3D and stress modelling technique that ensures they are amongst the stiffest cranks on the market but also lightweight.

The cranks are hot forged from high quality 7075 T6 aluminium. They then go through a CNC machined process and are then hand polished followed by anodised before being re-machined with the Middleburn logo. All cranks go through the same procedure so whichever crank arm you choose will be to the best quality.


We will have stock of all crank lengths early 2021 so please keep looking on our website or social media pages for stock updates. Due to COVID19 and the production issues it gave us our stock has taken longer to replenish then we had hoped. Thank you for your patience too.

175mm in silver in stock now.

Weight 0.56 kg

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