Mate had a puncture - a screw in the tyre of his new Audi A3. It's done less than 1000 miles. Asked for some help since he's got a problem in one hand.
Went round and took off the wheel - it's got a space saver spare so decided to get it fixed there and then so just left it jacked up. The screw was in the outer main groove of the tread - quite a way in from the edge so thought it would be repairable.
Took it to Kwik-Fit - they are the nearest tyre place. Bloke got out a special ruler and then a some sort of round template and pronounced the tyre scrap. Quoted 160 quid for a new one... Went to a specialist place I'd used for tracking - they have a four wheel computer alignment setup - and they fixed it for 7.50.
What is the formula for how close to the edge of the tread it can be? And is it somewhat of a guess?
BTW, congrats to Audi for giving the wheel bolt torque in the driver's handbook. 120 Nm If only they took their own advice - it was nowhere that tight when I took it off.