Old 01-17-19, 07:56 AM
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Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

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This was commonly done on older JIS (27.0) forks to allow fitting an ISO (26.4) crown race. It's a safe procedure if done properly.

My 1985 Bridgestone 400 came with a JIS headset and my LBS milled the fork crown to ISO size when I replaced the OEM headset. That bike is still in use.
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