Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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the main issue between JIS and ISO spindles isn't the taper angle, but the width of the taper at the center, or put another way, the width of the raper at the small end. This changes how far a crank arm will come up on the taper, and can cause problems in chainline, chainstay clearance and, in extreme cases, the end of the spindle coming through the crank so it cannot be tightened (the flip side is inadequate engagement of the arm which will ride on the tip of the spindle).
I can't predict in advance how this will play out for you, and it might work out fine, but be ready to make adjustments if it doesn't.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance