Hi I am running a 13 superb 140. tyres currently fitted are 225x45x17. has any body put 225x50 x17 on this model?  If so will they fit .Aviva ins say no problem

Quite a few people have done this without issue and say it gives a better ride. I believe it is a standard option on some continental markets. The main thing is to check your insurance - which you have done.

 

Have a read through this thread where the same question was asked and the size was tried & liked: Can I fit 225/50 R17 Tyres to my Superb by Silver1011

 

@kwmax: Something wrong with your Google? Hint: search first, then ask (in the right topic instead of creating a new one) if you have any more unanswered questions.