Ne one try putting 19" in the front and 20" in the back?
if so ne pics?? and specs?

no, and it wont happen, and if it does, it will look horrible, do this, go out to you car right now and look at the size of the wheel wells, compare front to back and you will see that the back is actually smaller than the front....

I considered doing 18's in the front and 19's in the rear to keep the same overall outer tire diameter while reducing the sidewall height of the rears, but I didn't wind up doing it. Just get the "correct" sized 19's for the front and the "correct" sized 20's for the rear, and it should be fine. Just verify that the outer tire diameters for the rear are at least as high as the fronts.

This is a big exageration. There are plenty of 20" tires that actually have smaller outer diameters than the stock 18's.

what are you talking about? go look at you car, FROM THE SIDE, if you have one, the rear well is smaller than the front, or it is lower or something...go look, because i was thinking aboout doing this and i went to a tire shop and he asked me what kind of car i have, i went out and showed him, and he pointed it out to me, 20's would fit, and you could do 19's in the front im saying it would look retarted....think abut it, bigger wheel in smaller space and smaller wheel in bigger space...the only cars that are REALLY suited for this are cars like porsches, lambos, ferraris, vettes and vipers because the have a very low front end, and a slightly higher rear end, the only reason you would do it is for styling so that is why people fill the large rear gaps on cars like that...

Let me paint you a pretty picture, look at all these cars. All the cars with the aftermarket wheels have 2 size wheels, with a 1 inch or even 2 inch difference on some. notice how even with the bigger wheels, the rear gap looks a lot larger than the front?




Now look at an IS350/250, stock wheels, same size yet the rear wheel gap look slightly smaller than the front, butting a bigger wheel would make the gap look even worse...


Note:This is my oppinion, if you would like to do it to your car, go right ahead, so dont attack me for this post...

I thought the wheel gap was smaller in the back because the back tires are bigger? Never actually measured the wells though...

James6290,

Take a look at the stock tire sizes on the front and rear. The rear tires have MUCH taller side walls than the fronts. If you put a lower profile tire on the rear with a larger wheel, the gap between the tire and fender can remain exactly the same. Take a look at the pictures you posted, the rear tires on those cars are all low profile, unlike those at the rear of a stock IS. IMHO, I think it looks WORSE when people do 20's all the way around with really low profile tires all the way around BECAUSE it makes the rear fender gap bigger than stock.

Depends upon the specific wheel/tire you have on the IS. I'm sure the AWD IS don't have this issue (all 4 wheel/tires are the same) I have the OEM 18's (staggered) so I know there is a 1" difference in width & height between the front and rears . . .

why? i see no point except for aesthetic purposes. Even that I do not think is a good reason.

That's kind of silly. There aren't ANY reasons at all to buy 19's or 20's other than for appearance. LOL

There are two kinds of performance. Visual performance and mechanical performance. Each school has its adherents, and each school holds the other in some degree of contempt.

I'm not disagreeing with you, but I think for most "mechanical performance" reasons, people would be installing 17" wheels on their IS350s and 16" wheels on their IS250's with ultra low profile tires in optimal widths.

"visual performance" LMFAO....that's an oxymoron if I've ever heard one. Do tuner stickers fall under that catagory?

I'm glad someone else sees the humor in it!

Yeah, stickers, 20"+ wheels (well honestly, anything over 17" is bling - there's a lot of awesome rubber 15" - 17"), BBKs on street cars, lambo doors, polished engine parts...the list goes on and on...

Well ... that's why I have 2 sets of wheels.