275/35s and 245/45s a problem?
04-27-2007, 03:01 PM
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275/35s and 245/45s a problem? i just picked up a set of 275/35 BFGs (275/40s now) for the stock rears. Will I be ok to put them on with my stock fronts 245/45s without throwing off my ABS or TCS computer by the size difference??
Brandt
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05-01-2007, 08:36 PM
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Yes this can cause an issue. With that setup your front tires have a much larger diamater than the rears(110.25mm vs 96.25). I believe the general rule is to keep the front and back diameters within 5% of eachother.
The problem is that the computer compares how fast the fronts and rears are turning to monitor wheel spin. What can happen is the computer gets thrown off by the wrong tire size and always sees your rear tires are turning faster than the front(wheel spin). It will then activate your traction control all the time. So you'll be driving around with your car constantly blipping the throttle and hitting the brakes on its own.
The problem is that the computer compares how fast the fronts and rears are turning to monitor wheel spin. What can happen is the computer gets thrown off by the wrong tire size and always sees your rear tires are turning faster than the front(wheel spin). It will then activate your traction control all the time. So you'll be driving around with your car constantly blipping the throttle and hitting the brakes on its own.