I have just noticed that there is what appears to be scuffing around the outside and inside edges/shoulders of all my tyres. There is a brown band around the tyres which I assume is caused by excess wear. The car is less than a year old and has only done 1700 miles. The tyres are Bridgestone Turanza 215x55x18. I have read that this could be due the pressures being low, however, I always keep them at exactly the recommended pressure of 36psi or even slightly above. The car has recently come back from being repaired after a rear side shunt but I cant think how this could affect all the tyres in exactly the same way. Any advice welcome.