Early SIDS were 63mm anyway, and even the later 80mm ones can be switched to 65mm by inserting a spacer.bduc61":2joe3xqb said:80 mm seems a bit too much for this type of frame.
I have tried my exact with a sid team at 80mm and frankly, feels rather strange ! so back to an obsys ( I call that a man's fork or a reducer of discomfort but not truly a suspended fork )
I think a fork at 65mm is probably the best choice