E.1.3. mountain-drive - installation into very narrow and very wide bottom bracket shells

For extrem narrow b.b. shells of 50 mm width (for example on fully faired cabin bikes) we deliver such a version.

There is also one available for extra wide b.b. shells of 100 mm width (Surly, some new E-bikes).
Important: mountain-drive versions for 50- and 100 mm- b.b. width are available with torque lever only, as all these versions come with right hand thread of the nut only!

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