schwim wrote:I've been riding an 8 speed bike with a 9 speed Race Face crank for a while now. No issues at all. My research pointed towards 8-9 being interchangeable while 9-10 could cause issue. This was due to chain width. 10 speed chain width was not compatible with 9 speed hard parts, but 8 speed components work well with a 9 speed chain. My experience has reflected this.
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