TCS problems with tire size
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Joined: May 2006
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From: Redondo Beach CA
TCS problems with tire size
I am in the process of looking for new tires and the Nitto INVO are looking pretty good. I have read that changing the tire size can cause problems with TCS system. From searching I came up the requirement of just having a larger tire keeps the TCS happy. Is this correct?
Nitto doesn't offer a 245/45/17 but they do offer a 245/40/17 would this work fine. I would still be keeping a 275/40/18 for the rear. Also which set of wheels is the speed read from?
Nitto doesn't offer a 245/45/17 but they do offer a 245/40/17 would this work fine. I would still be keeping a 275/40/18 for the rear. Also which set of wheels is the speed read from?
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Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
I am in the process of looking for new tires and the Nitto INVO are looking pretty good. I have read that changing the tire size can cause problems with TCS system. From searching I came up the requirement of just having a larger tire keeps the TCS happy. Is this correct?
Nitto doesn't offer a 245/45/17 but they do offer a 245/40/17 would this work fine. I would still be keeping a 275/40/18 for the rear. Also which set of wheels is the speed read from?
Nitto doesn't offer a 245/45/17 but they do offer a 245/40/17 would this work fine. I would still be keeping a 275/40/18 for the rear. Also which set of wheels is the speed read from?
Bill
Burning Brakes
Joined: May 2003
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From: Roswell New Mexico
St. Jude Donor '07-'08
As long as the overall diameter of the rear tires are larger then front or the same size, you won't have a problem with tractions control. If the computer thinks the rear tire are spinning faster then the fronts, then you have a TCS issue.
.
Instructor
Joined: May 2005
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From: San Jose CA
This size difference may be significant, but what the TCS will do with the info, I'm not sure. I just posted a response to another tire size question regarding Z06 rears, but will do the calculations for these sizes as well.
245/45-17: 245= tread width in mm, 45 is the aspect ratio (0.45), and 17 is the rim diameter. Using simple math (not actual measurements) this results in an outside diameter of 25.86", a circumference of 80.68" and 785 revolutions/mile.
245/40-17 = OD of 24.72", circumference of 77.65", and 816 rev/mile.
That's a 1" difference in overall diameter, and a 4% increase in wheel speed.
The stock rears are 275/40-18; 26.7" OD, 83.8" circumference, 756 rev/mile. Again, I have no idea what the TCS system will do.
Craig
245/45-17: 245= tread width in mm, 45 is the aspect ratio (0.45), and 17 is the rim diameter. Using simple math (not actual measurements) this results in an outside diameter of 25.86", a circumference of 80.68" and 785 revolutions/mile.
245/40-17 = OD of 24.72", circumference of 77.65", and 816 rev/mile.
That's a 1" difference in overall diameter, and a 4% increase in wheel speed.
The stock rears are 275/40-18; 26.7" OD, 83.8" circumference, 756 rev/mile. Again, I have no idea what the TCS system will do.
Craig
