I know they plug things like nails and screws but it looks like the GF has managed to run over a broken bottle/ headlight or something as its sliced the tyre and penetrated. How much is impossible to say without removing the tyre I guess. All I know is I was out on new years day changing a tyre in the pouring rain!
Whats the likleyhood this is repairable/ is it worth even attempting to repair it?
I have never actually had a puncture before in 10 years
Secondly, the tyres on the back of the car still have 4mm left of life, but have been on there for at least 3-4 years and are showing signs of cracking in the sidewalls. Is this an issue to be concerned about?
Any advice considered, not necessarily taken