rc707

I have a problem with my staggered 2006 IS250 wheels. Is it possible to replace the rear wheels with an 18x8 front wheel without any modifications so I can rotate my tires

Thanks in advance

mikez

it depends on the tires.

the OEM rear tires makes the rear wheel slightly bigger than the front, so having one rear wheel slightly bigger than the other is bad for the differential if you log too many miles.

FMJ IS

i have a basic IS250, came with 205/55/16 both front and rear.
when i upgrade to 18 or 19, should i stay with same diameter or bigger for rear?

some online tire size calculator say not to exceed 3% difference, but the OEM 17" and 18" are all greater than 3%.

but if i go 19" 225 or 235/35/19 and 265/30/19 are within 3%, what should i do? or do i have a different rear differential?

rc707

I think I've been misunderstood. I don't want to replace just one wheel, i want to replace the rear wheels which are 18x8.5 with a set of 18x8's which are the same size as the front, so I can rotate the tires every oil change. By doing so I hope to get more life out of my tires. I'm currently getting about 15k with the staggered setup that cant be rotated.

Lets say I put 225 40 18's all the way around. Do I need to install an adapter to the rear wheels to compensate for the rear wheel ofset? Or is there and offset?

mikez

For: rc707

You can run 18x8 in the rear, no need for adapter, all you lose out is the coolness factor associated with the stagger layout.

For: FMJ IS

You can go above the 3% it doesnt matter, all it does is it increases the error rate of your speedometer's reading.

For RWD you can go with larger rear diameter no problem.

You should avoid having the left and right wheel having different diameter on the same driving axel, as the differential sends power to both your rear left and rear right wheels, and if one is larger than the other then the unbalance in their rotational speed will put a lot of stress on the differential.

farquad

^ you can do that, shouldn't be a problem.. wouldn't need an adapter

rc707

FMJ IS

If moneys not an option I prefer the staggered set, looks very nice. If your looking for "pop" the bigger wheels are he way to go, my suggestion however would be the same size tire. You will only get about 3 oil changes or 15K on running a staggered set, but could possibly get 2x that with the same size and rotate.

rc707

Anybody else care to add?

sinister2c

get some tires with a higher wear rating. and if you are wearing camber, flip the tires at half life if you want more life out of them.

istundra

iTrader: (2)

You can definitely install 18x8 w/ 225-40-18 tires for the rear but... why do you want to do that?

Since you cannot rotate your tires, you can always just replace the front only when needed... you do not have to replace the whole set.

Just got to make sure you get matching tires and you should be OK.

rc707

All my tires are wearing evenly, I got about 20k out of the original set but the next (dunlop sport maxx) only 15k.

So are you insinuating that I should get the same mileage out of a staggered set vs an even set that can be rotated??

FMJ IS

so is the speedometer reading from the front or the rear?

3 oil change or 15K for a set of staggered size...lol, thats a good measure. but damn, any 265/30/19 with 300+ tread rating? with good traction and won't cost too much?

mvlbr

You should get more miles if you rotate out of a non staggered set up. When I had my matrix I was able to get 45k off of some yokohama Parada tires with probably another 3-5k left.

rc707

Speed O reading is from the rear, the edges of the front tires tend to dip, causing intolerable noise. The front is aligned, rotating from side to side makes no difference. The tread on the rears are beyond the lowest wear marks.