JIS and ISO 1inch headsets have different diamiter fork crown elements. JIS is much looser on an ISO fork. I know this because i bought the wrong one and i could press the cups and crown race on to the steerer and frame by hand. worth a check before you start glueing or putting shims in.
JIS and ISO 1inch headsets have different diamiter fork crown elements. JIS is much looser on an ISO fork. I know this because i bought the wrong one and i could press the cups and crown race on to the steerer and frame by hand. worth a check before you start glueing or putting shims in.