How much is 1%?

[sunwolf]

I am considering buying these tires http://www.tirerack.com/tires/tires.jsp?tireMake=Michelin&tireModel=Pilot+Super+Sport&partnum=545YR0PSSXL in size 255-45-R20 the diameter of which is 1% wider than stock. I was thinking of maybe only buying 2 and keeping them on the back until my other two goodyears on the front wear out since they might have another 5k in them. If I adjust the tire pressures do you think I will be ok running 1% larger tires on the back? It seems like the back tires hardly wear at all compared to the fronts so hopefully in 5k when I buy new fronts they will be close to new still.

 

[BiGMaC]

Likely not enough for you to notice the difference... the stats at Tire Rack should also list diameter and tire revs/mile to give you a better feel for it.

 

[sunwolf]

Didn't think about checking the revs per mile. Tire rack says 729 for stock and 716 for the ones I want to get. I think that this difference is probable small enough that it won't matter. Anyone object before I order them?

 

[Frozen Taurus]

I have 255/45 on my car now ... never noticed a difference at 1% change

Sorry just read that you want to do only back tires .... I have no experience in that area but I'd imagine that our drivetrain could tolerate a 1% diff

 

[sunwolf]

I have 255/45 on my car now ... never noticed a difference at 1% change

But I was going to do 255 on the back and 245 on the front until my fronts wear out. Will that make a difference?

 

[SHOdded]

Should be fine.  I would be more concerned with traction differences, but as long as you stay away from aggressive driving, no problem.

 

[Frozen Taurus]

I have 255/45 on my car now ... never noticed a difference at 1% change

But I was going to do 255 on the back and 245 on the front until my fronts wear out. Will that make a difference?

Should be fine for 5K

 

[BiGMaC]

I have 255/45 on my car now ... never noticed a difference at 1% change

But I was going to do 255 on the back and 245 on the front until my fronts wear out. Will that make a difference?

Should be fine for 5K

Many people just run staggered tire sizes... like Mike (bpd)... all the time.

 

[Frozen Taurus]

Wasn't Mikes combo under 1% difference? ...still shouldn't matter

 

[glock-coma]

I remember someone posting here that the all-wheel-drive system is happy as long as it stays below 3% difference. I can't  seem to find the post though.

 

[SHOdded]

I think there may be a blurb in the OM as well somewhere.

 

[sunwolf]

Well I just bought two of the tires. If there is a problem I can always buy the other two.

 

[SHOnUup]

The stealership we got our SHO from sent us on our merry way with a front tire that had a plug in the sidewall that was a "rope" plug. Wicks moisture in and theoretically would rot out the steel belt. After having this pointed out, they only replaced that one. Bums. Anyways, I left there and bought another one to have same size on fronts, rears were maybe 60% tread wear left and car didn't care about the slight difference.

Rich

 

[crash712us]

Keep in mind any difference in rolling diameter will cause every part of the AWD system to be constantly work over time. And your reasoning for want to do this looks to insure that this will be happening for many many thousands of miles. 


Sent from my iPhone using Tapatalk

 

[HtrdMKS]

Plus if you take into consideration the wear on the fronts; since you are down to 5000 miles of wear left, the new tires and the old tires may have the same overall circumference.

 

[sunwolf]

Plus if you take into consideration the wear on the fronts; since you are down to 5000 miles of wear left, the new tires and the old tires may have the same overall circumference.

New tires are 1% bigger.

 

[moem1090]

If you say another 5k I would buy 4 new tires and rotate them approx every other oil change