Last month we had to shell out close to $1k to replace all four tires when a large (>10cm) nail punctured one. Costco guy said you had to change all of them, I didn't't believe him but after research found out that if you have some mileage on your tires, you can't just change one (actually there was mentioned of reducing the grooves of the new tire to match the old ones but that sounded error prone).
Last month we had to shell out close to $1k to replace all four tires when a large (>10cm) nail punctured one. Costco guy said you had to change all of them, I didn't't believe him but after research found out that if you have some mileage on your tires, you can't just change one (actually there was mentioned of reducing the grooves of the new tire to match the old ones but that sounded error prone).
We need a magnet man for all big cities!