John, I have 17inch wheels and the tyres are 225-50-17`s.
I have had the car (bought from Lexus Chester) for just over 4years. It had 17,000 on the clock and one previous owner. It has now completed 49,000 miles and has performed faultlessly. It is a pleasure to drive and can arguably be said to lack charisma and character (unlike Audi, BMW or Merc ! ). It is silent in operation and can be relied upon in all circumstances.It does not breakdown or complain.
I have an extended Lexus Warranty and a Lexus Service Plan.Both are paid monthly by Direct Debit and I have not had to pay one penny extra for anything in 4 years.
The OnBoard Computer shows 35.6 mpg over 49,000 miles, giving a real 33mpg me thinks.
I cannot complain about anything. I must advise that it may take a little while to get used to its performance and undoubted character and reliability.
Good luck.
Regards
John