I've been trying to get a quote from my local Bob Jane for a set of 185/45 R15 tyres, they come back saying they are not the correct size for my car. I explained that the wheels are not standard and I am currently running 195/50's but want a lower profile tyres but they replied saying;

Unfortunately we cannot fit a 185/45R15 to your vehicle due to the large difference in overall diameter which is outside the legal requirements.

Please let me know if you want us to supply with you a 185/55R15 or 195/50R15.

Is this true?

I'm not asking for a crazy size or loads of stretch and i can't see a problem. Has anyone else had issues like this?

I am obviously going to try elsewhere but their prices were the best.

Wheels are 15x7 by the way.