RyanDao

Hi forum,

Thanks in advance for your reply. I have a 2K TL with Acura body kit and 18" rims. The rims came with BFGoodrich tirew when I bought them. It runs great until I replaced my tires. I now have Kumos and the back left tires rub the kit fender when I turn right. I thought is was the Acura springs or struts or shocks but Acura checked and everything is fine. Can the Kumo be bigger than the BF eventhough it's the same size? Now I'm thinking of getting springs for the TL. Do you think that will fix the problem? Any ideas will be great. Thanks again.

Ryan

Hercules

Are they the same size tire?

And putting springs on your car lowers it.. so that would just make it worse.

SilverUA5

Some tires are wider than other brands even if they list them as the same sizes. What sizes are you running and what's your wheel specs and offset?

RyanDao

They are the same size tires. I am hoping sport springs will be stiff enough so the tire will not rub.

Thx, RD

RyanDao

Kumo 225/40zr18. Don't have anything to measure exact offset but looks around 2"

Hercules

That's stupid to begin with... if you don't have the proper size tires to begin with your speedometer will be off when you're driving.

BostonTL

Have u tried trimming the plastic tab between the bumper and body area ? It solved my rubbing problem setup is 18x8 same size tires as yours and offset +48.

SilverUA5

Offsets are stamped on the inside of the rims, 2" doesn't really mean anything. Like I said before, some tires have narrower sidewalls than others. Since your tire size is 225/40, it's rubbing because of your offset probably being less than +45. Try what others are saying by trimming your rear tabs, it should solve your problem.

Blazin TL

what are you talking about

it strange that it only rubs on the left rear side, if it doesn't rub on the right, i think there would be something wrong with the car rather than tires...

RyanDao

Yeah, turning left is fine. Will try trimming then update forum. Thx again.

Ryan

Hercules

If the 18s don't match the stock tires in circumference and diameter with the tire on, then the speedometer gets thrown off, and sometimes by quite a bit.

If you have even a 1/2 inch difference between the stock tire and aftermarket tire then you will get a difference of ~10-15 miles/hour on your speedo that's off.

Now if the tires are rubbing that's another story, but not having the right size tire on in the first place is stupid.

Lawaia

A 1/2" difference in ride height would yield an approximate 4% error in speedo readings which equates to a 2 to 4 mph difference.

fuggedaboutid

RIDE height and TIRE height are two different things!!!

Ride height refers to SPRINGS/SHOCKS.

Tire height (diameter) refers to ROLLING size/Revolutions per Mile.

You want about 1% or less in terms of difference btwn original tire outer diameter and your replacement 18's.

I think that 225 is too wide unless you have the proper offset .

Also, consider getting 215's in 18 if possible, I think it's 215/45/18?

I think if it's your left tire that's rubbing maybe it's alignment is OFF or that the plastic trim in the wheelwell is protruding.

Lawaia

1/2" Ride height difference is equal to 1" difference in rolling diamter. That is what I meant. When dealing with tires, Ride Height differences is equated by taking the tire height divisible by 2. So as you can see, RIDE height is also affected by tire selection, not only by springs.

Majority of members rolling on 18" has opted for 225/40's which have a larger selection to choose from thus much cheaper than the 215's. Proper offset is determined by the wheels, not the tires.