My car has been recently tested and the garage says i need 2 x new rear tyres as they are low on tread but still legal. The front tyres have plenty of life left in them, the garage have also told me that i should buy all 4 new tyres as new rear tyres only may cause issue to the drives. Obviously the cost of these tyres are not cheap and before i purchase 2 new front ones, has anyone just replaced either the front or rear and had any drive issues or is it just another case of a garage wanting to sell me tyres. Appreciate any/all feedback.