jis x iso headset standard.

colker

Well-known member
I bought a shimano headset and found out the crown race is 27.0..
I am looking to sort out the lower half of the headset. My question is regarding the upper half: JIS is 30.0 and my wicked should be 30.2.
Does anyone have experience w/ this? Would a shimano JIS headset come w/ the upper race made for 30.0 instead of 30.2?
 
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