I’ve had this, needed a washer to clear cup. It’s just a matter of where the crown’s mounting hole is in relation to the headset. Wouldn’t be an issue with the Thorn fork I’d wager.
That bike is likely to have had a quill with a cable stop on it back then (no idea if rockhoppers did but likely), but you’re going AHead aren’t you.
I’ve had this, needed a washer to clear cup. It’s just a matter of where the crown’s mounting hole is in relation to the headset. Wouldn’t be an issue with the Thorn fork I’d wager.
That bike is likely to have had a quill with a cable stop on it back then (no idea if rockhoppers did but likely), but you’re going AHead aren’t you.