Originally Posted by
rothenfield1
I'm assuming that the JIS taper was a little narrrower allowing the crank to slide all the way to the back of the taper. Seems to prove it is a JIS crank?
JIS tapers are actually larger at the end than ISO. They both use a 4° included angle but the JIS starts slightly larger across the flats. It sounds like you installed a JIS crank on an ISO spindle.