mikewads

I was wondering why most 19" wheel owners are installing a 235/35 on the front and a 275/30 on the rear. Why not keep both front and rear tires with the same an aspect ratio of 35? Is it because the 275/35 will rub?

Flipsonic

Because 235/35 and 275/30 has almost the same od. 275/35 will be about 1" bigger. Some people lower with coilover and do not want rubbing with minimal fender gap. I plan to go from 275/30 R19 to 275/35 because I lowered with Eibach and the fender gap is bigger in the rear. Now if i can only figure out which tire is the quietest. I hear Yokos are quiet even when they wear.

mikewads

You are correct. I entered the tires sizes using discount tire's calculator and there is only a .02" difference in OD when using 235/35 & 275/30.

OEM is 225/40R18 & 255/40/R18
Why is the rear Lexus OEM tire .94" taller than the front?

I'm thinking that extra inch of rubber might ride smoother using the 275/35.

mikeho

After reading reviews, I settled with the Goodyear Eagle F1s. They have excellent traction and are pretty quiet. I don't remember how they compare to Yokos.

montgb

iTrader: (7)

I put 235/35s in the front and 275/35s in the rear to keep the same aspect ratio that came with the stock IS350 tires (i.e. rear 1in greater diameter than front).

Whether or not you will rub will depend on the offsets of your wheels. I originally had Eibach springs and a +38 offset, and I had slight rubbing on one of the rear tires.

4TehNguyen

iTrader: (1)

why do you want to have matching aspect ratios its irrelevant if they match or not, especially on the rear they need to be 30 for a 275 tire or the speedo will be off which in turn makes your odometer off

montgb

iTrader: (7)

A 275/30 tire has a smaller overall diameter than the stock IS350 rear tire (by about 1/2"), so your odo is going to be off no matter what.

I don't know everything about a staggered tire setup, but I figure its good to keep the diameter ratio the same if you're going to be increasing the size of the front tire (which you do with a 235/35).

With a 275/35, the rear is about 1" bigger diameter than the 235/35, same as the 255/40-18 and 225/40-18.

dappy

iTrader: (13)

I'm also planning on getting Eagle F1 GSD3 tires. My set-up will be 235/19/35F +35 and 265/19/30R +32. I'm lowered on Eibach Pro-kit. I noticed most members used the same tire specs. Will 30R be good or 35R? The only concern that I have is rubbing in the rear with a 35R set-up. What do you guys think?

maxnix

They and the Michelin PS2 are the best tire technology right now. Everyone else is at least a half a step behind.

hustlerx80

so ur saying that if im planning to lowered my car with the eibach pro kit springs..i should get the 225/35/19F and 275/35/19R ...but wouldnt my rear rub..cuz its 1" bigger?

montgb

iTrader: (7)

You mean 235/35 in the front, right? You won't have any issues with that.

For the rear, a 275/35 is only about 1/2" greater in diameter than the stock rear tire. And for what its worth, a 235/35 is about 1/2" greater in diameter than the stock front tire.

I know a couple people who have this setup and had no rubbing issues. However, one of my rear tires rubbed slightly - I probably should have gotten a different offset. If you do rub with your set-up, fixing the problem could be as easy as rolling the fenders or as expensive as getting coilovers.

hustlerx80

how about a 235/35/19 F and 265/30/19 R with some 19x8F and 19x10R wat kind of offsets could i get so i wont have any rubbing issues? or should i get a different setup if i got my 19x8 and 19x10...with a different offset too? but i also want it as flush as possible without no rubbing of course...

4play4dr

bump for that..cuz i wanna kno what works with those size rims too

montgb

iTrader: (7)

I think lots of people use the 265/30-19 tire w/o rubbing. Check the aftermarket wheel thread.

iSuxeL

iTrader: (21)

I will be using a 235/35 and 265/30 also with my 19x8.5 and 19x10.5