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Replier: OA
Reply Time: 2011/02/08
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2011/02/08, user debun has made number 1 times of modification
There where a few replies in Chinese so maybe somone already said this.
ISIS spline BB's have a taper. It looks like one or a combination of two problems. The crank spline/taper is worn or not made to spec or the BB spline/taper is not made to spec/worn. Before you replace the BB or crank I would try to identify which part is not to spec. Do you have any old BB's or cranks laying around?