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This sums it up fairly good
To be honest I don't understand why they didn't arrive at ISIS directly, maybe there's some engineering point with the shallow edges?
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SasenFrAsen
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I don't understand why they didn't arrive at ISIS directly
Octalink was a Shimano proprietary product. ISIS was a response from a few other players to offer a similar axle without paying licensing fees. Shimano continued to produce Octalink up to Claris 2400 at least, long after ISIS was abandoned as a mainstream product.
Shimano got it wrong in v1 in terms of MTB use; while the short splines are OK for pedalling forces, they tend to strip out the cranks when people land jumps
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@danstuff and @SasenFrAsen
Thank you for the invite down a rabbit hole.I'll get out the measuring devices tomorrow.
gbj_tester
mespilus
P.S IIRC there were two types of Octalink BB, one with short splines and one with long splines. You might want to measure the length of the splines on the cranks. I'm not an expert on Octalink by any means, however, so someone else may have some more detailed advice.