On 12/07/2015 05:16 PM, Garth wrote:
This is an IRD cassette, nothing to do with Riv other than they are a retailer. The odd cog choices apears to be an IRD chacterstic in both cassettes and FW's. They seem to be in love with 17-21-24 jumps when 17-20-24 is to me at least, perfect. Also 15-18-21-24 on 6 sp. FW when 15-17-20-24 is perfect.
Those progressions at least are "normal" in that the farther you go towards the largest sprocket the bigger the jumps get. What's strange are jumps that get larger, then get smaller, and then get larger again. I don't think I've ever come across that.
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