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remember reading on their website (they've since changed it) that they use a slightly different taper angle than ISO as suggested by @mdcc_tester.
On whose website? I've never said anything about taper angle being different between properly made JIS and ISO spindles.
gbj_tester-
I think it was the Token website. Afaik there is no difference in taper angle between JIS and ISO, both taper at 2 degrees relative to centreline according to Sheldon. What I meant was that Token/Tifosi ISO BB spindles have a different taper angle (not 2 degrees, I think they mentioned the angle but I cannot remember the exact number). At least that's what I remember from their website. They didn't mention anything about JIS, so I assumed that their JIS spindles had the usual taper angle and therefore seem to work fine
Edit: this is what I was referring to, see last post in this thread by a Token rep. Their ISO spindles are 1.8 degrees, their JIS spindles 2 degrees
http://www.bikeradar.com/forums/viewtopic.php?t=12763762
BTR88
I had the same issue with this BB and remember reading on their website (they've since changed it) that they use a slightly different taper angle than ISO as suggested by @mdcc_tester. They didn't mention anything about JIS if I recall correctly so that might explain why tester's JIS spindle is fine