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@laner
Due to being an idiot, i lost the pre-load bolt on the on-one external crank set.
http://www.planet-x-bikes.co.uk/imgs/products/900x650_constWH/CSOOTC_P1.jpg
Fromm looking at pictures of other external cranks, this looks to be like hollowgram 2.
Would this be correct?
And does the number, aka M20 denote how many mm the bolts threads are?