Traction control and Rear/Front tire size difference?
02-04-2017, 09:26 AM
#1
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Traction control and Rear/Front tire size difference? How much of a diameter difference can there be between the rear and front tires before the traction control goes wacky? I have STS-V wheels and was thinking of doing 285/35/19 (26.9 diameter) on rears and 245/45/18 (26.7 diameter) on the fronts. I wasn't sure if that difference would effect the traction control?
I could do 295/30/19 and 255/40/18 for an equal 26 diameter but I didn't want to really change the speedometer reading that much.
Let me know what you guys think and have experienced.
I could do 295/30/19 and 255/40/18 for an equal 26 diameter but I didn't want to really change the speedometer reading that much.
Let me know what you guys think and have experienced.
02-04-2017, 09:45 AM
#4
In the winter, I've run 245/40ZR18 (25.70") front and 245/45ZR18 (26.70") rear ExtremeContact DWS06 on my CTS-V and not had a problem with traction control. Gotta remember that when you run a larger rear tire than the front, the traction control won't kick in as quick, which you can actually use to tune traction control to your preferences.
02-05-2017, 10:35 AM
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In the winter, I've run 245/40ZR18 (25.70") front and 245/45ZR18 (26.70") rear ExtremeContact DWS06 on my CTS-V and not had a problem with traction control. Gotta remember that when you run a larger rear tire than the front, the traction control won't kick in as quick, which you can actually use to tune traction control to your preferences.
You can tune in the wheel sizes for your car and have it use both to calculate the speed.
Its that easy...
Its that easy...
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02-06-2017, 09:54 AM
#9
I run 275/35/19 rears and the stock 245/45/18 up front on my STS-V wheels. No traction control issues.
In those sizes, the rears are actually 0.4% smaller than the fronts. As long as you're within 1% diameter difference you should be fine.
With your proposed 285s you'll be 0.6% larger in the rear.
https://www.miata.net/garage/tirecalc.html
In those sizes, the rears are actually 0.4% smaller than the fronts. As long as you're within 1% diameter difference you should be fine.
With your proposed 285s you'll be 0.6% larger in the rear.
https://www.miata.net/garage/tirecalc.html
02-06-2017, 12:38 PM
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I run 275/35/19 rears and the stock 245/45/18 up front on my STS-V wheels. No traction control issues.
In those sizes, the rears are actually 0.4% smaller than the fronts. As long as you're within 1% diameter difference you should be fine.
With your proposed 285s you'll be 0.6% larger in the rear.
https://www.miata.net/garage/tirecalc.html
In those sizes, the rears are actually 0.4% smaller than the fronts. As long as you're within 1% diameter difference you should be fine.
With your proposed 285s you'll be 0.6% larger in the rear.
https://www.miata.net/garage/tirecalc.html
02-06-2017, 04:30 PM
#11
You'll also notice some big price swings between 275s and the 285s in the same tire. Some vary by as little as $10, some by $80.
Hopefully this link works:
http://www.tirerack.com/tires/TireSe...earDiameter=19
Hopefully this link works:
http://www.tirerack.com/tires/TireSe...earDiameter=19
02-06-2017, 04:58 PM
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You'll also notice some big price swings between 275s and the 285s in the same tire. Some vary by as little as $10, some by $80.
Hopefully this link works:
http://www.tirerack.com/tires/TireSe...earDiameter=19
Hopefully this link works:
http://www.tirerack.com/tires/TireSe...earDiameter=19
02-06-2017, 05:04 PM
#13
I was just checking those out on TireRack myself and liking what I saw, but I'm on a fresh set of Continentals for now. My only concern would be tire noise once the soft outer layer wears away due to the large tread blocks, but the reviews don't seem to complain about that.
02-07-2017, 11:41 AM
#16
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Before I had the longer studs installed on my front wheel bearings I was running 245/45R18 Front and 275/35R18 Rear. A 4.13% difference. It worked fine for around town driving under 45mph. Stability control would go nuts over 45mph though. I had to hit the TC off button to disable Stability control to drive it on the highway until I got the 275/35R18 fronts on.
I'm in the process of putting 295/35R18 tires on the rears with the 275/35R18 fronts which is only a 2.11% difference so we'll see how that reacts if at all (fingers crossed).
I'm in the process of putting 295/35R18 tires on the rears with the 275/35R18 fronts which is only a 2.11% difference so we'll see how that reacts if at all (fingers crossed).
02-07-2017, 02:42 PM
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Before I had the longer studs installed on my front wheel bearings I was running 245/45R18 Front and 275/35R18 Rear. A 4.13% difference. It worked fine for around town driving under 45mph. Stability control would go nuts over 45mph though. I had to hit the TC off button to disable Stability control to drive it on the highway until I got the 275/35R18 fronts on.
I'm in the process of putting 295/35R18 tires on the rears with the 275/35R18 fronts which is only a 2.11% difference so we'll see how that reacts if at all (fingers crossed).
I'm in the process of putting 295/35R18 tires on the rears with the 275/35R18 fronts which is only a 2.11% difference so we'll see how that reacts if at all (fingers crossed).
02-08-2017, 10:14 PM
#18
Before I had the longer studs installed on my front wheel bearings I was running 245/45R18 Front and 275/35R18 Rear. A 4.13% difference. It worked fine for around town driving under 45mph. Stability control would go nuts over 45mph though. I had to hit the TC off button to disable Stability control to drive it on the highway until I got the 275/35R18 fronts on.
I'm in the process of putting 295/35R18 tires on the rears with the 275/35R18 fronts which is only a 2.11% difference so we'll see how that reacts if at all (fingers crossed).
I'm in the process of putting 295/35R18 tires on the rears with the 275/35R18 fronts which is only a 2.11% difference so we'll see how that reacts if at all (fingers crossed).
02-08-2017, 11:49 PM
#19
I considered this without the suspension change and I think the fenders are rolled pretty good up front if you check them but the issue ended up being the inner fenders and not the metal even at stock height. I didn't do it after talking to a few people and stuck to stock fronts with the same wheels you have. I also didn't need 4 new tires either so if it works for you please let us know.
02-09-2017, 06:59 AM
#20
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I'm basically running the same or extremely close to same offsets as the TD wheels with my 275/35R18 square setup using spacers. My ride height is set very low and I don't have any rub issues to date. I have not rolled any of my fenders.