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Middleburn RO1 tandem cranks are compatible with square taper type bottom brackets. RO1 tandem front cranks are plain on the right side and on the left it has splines for fitting on a spider or direct mount uno. This can be changed upon request to suit which side you require. The rears have drive splines on both sides and come with lock rings too as does the front drive side. Image is for illustration purposes only too.

The Middleburn RO1 tandem cranks are available in lengths of 170mm and 175mm in black. We have some other sizes available but please contact us for stock updates. All crank arms are machined with a jis taper.

Middleburn cranks were first developed in 1991 and since then the cranks have undergone many refinements. This is the latest road 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 light too.

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.

These Middleburn cranks do not come with the self-extracting bolts. The bolts can be purchased separately from our website.

Weight0.450 kg




Front or Rear

Front, Rear


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