Recently I hit a kerb with my front offside tyre on a badly lit road where the pavement had been built out on a corner and when I inspected it the following day there was a 50mm strip of rubber partially sheared away from the tyre wall just below the tread area. When I took it to my local tyre centre they said it was okay to drive on if there was no air leakage. I thought this was dubious advice as I didn’t want to have a blowout if the tyre became unsafe and understand that tyre walls are not that thick (mine are 215 60 R17 for a Suzuki Vitara). I asked for the tyre to be changed and when I asked what they would do with the old one (which wasn’t very worn) they said they would throw it away as it could not be sold again. Was I correct to change it immediately and would that kind of damage have resulted in an MoT fail?