On my 4/4 Anniversary with 185/70s there was no rub.
On my Plus4 with the same tyre size there is rub. When I fit the Mulfab steering bearings I'll take a view.
It might be possible to squeeze a section of the tube in my vice. It only needs 2 or 3mm to provide clearance over about four inches length. (Sorry to mix metric/ imperial).
I have some rollers in stock but I'd rather not fit them.