has anyone install 225/55/17 on there car?
im thinking of upping to 55 series on my stock rim has anyone did this?

 

I'd say this isn't recommended:

Speedometer Difference: 3.445% too slow
Diameter Difference: 3.33%

This is a bit too far out of spec for my comfort zone.

 

then whats the different with people put 20's and 22's inch rim on? there spec would be off too right?

 

Ultra low profile tires.

 

on 20s, yes, that's similar out of spec tires

but on 17s, i am not sure about the reason why?

 

it all depends how how you do it. for people who have stock 225/50/17 tires, the correct 20" size would be 245/30/20.

what is your reason for wanting to go with a larger sidewall?

 

I'm going to assume that he's trying to lessen the wheel gap.

 

thats also my assumption. cant be to give more cushion for the wheel because 50 is already a large sidewall.

 

Well I like the bigger cushion for a smoother ride.. What do your think I can go with 55 series?

 

are they run-flats? you may just try changing them to regular tires...should be much softer.

 

I think the further you go over spec, the harder it is on your brakes... there is no FITMENT reason why you can't do it, it's up to you. Just remember you'll be going faster than your spedometer reads so it might get you into trouble with the law if you're not always aware of your real speed (by looking at your speed via a GPS, for example). On the other hand, it will be healthy for your odometer (and bad for your fuel economy readout).

 

The speedometer on Lexus is too optimistic anyway. I know that when I go 60, the speedo shows 62-63. That's 3-5% off. So, the slightly bigger tire, like 225/55/17 will make the reading more accurate.

 

absolutely true....by the way 225 55 will probably rub in the back of the wheel well lining while at a 30 degree angle or so...

 

That would be my biggest concern.

 

given you are already on 50 series tires, going to 55 i am not sure how much more beneficial it's going to be