Ive just been offered a day at knockhill with my dealer. before I grab the chance just wanted to know how much it costs to replace all 4 18" tyres?

Thanks

You shouldn't wear the rears out I wouldn't have thought.

Bet its cheaper to buy a set of 16s from Halfords with a full set of tyres than replacing 4 18" tyres anyway. Use them as a spare trackday set. (If they'll go round the brake calipers)

Don't think they'll go over the calliper, but good plan

Knockhill Is an absolute killer on the Passengers side tyres. In particular the rear all the corners bar the exit of seat corner and the weir chicane are right handers.

The last time i was on i took about 4-5 mm off a pair of tyres