Thanks to you both. The rear rim is definitely wider then the front (~3.0″ vs 2.5″ outside width) so I’m a bit baffled why it has a 3.25 section tyres on both front and rear. Clearance doesn’t look like an issue so I don’t know why the correct size rear was not fitted. My current preference is for more modern section tyres so I’ll have a look at the Road Riders. The budget option appears to be Mitas tyres – can anyone comment if they are any good?