i recently got a 2002 Tahoe as a family wagon. I retired the cp due to a severe case of toddler torture..., i took the wheels off my 07’ Silverado and put them on the Tahoe only because they look so nice and I’m trying to convince my wife that we got a great deal...The factory wheels for the Tahoe are 16”, the ones I Have on there now are 17”and I’m pretty sure the tires are a tad bit wider and taller than factory. The Parking brake and ABS lights both come on now after a few miles of driving. I have a sneaking suspicion it’s the bigger wheels. Can I use one of them new fangled OBD machines or something to “learn” the new wheel size? There is no difference in the drive. The new wheels and better tires are actually a better ride. But What to do about the bothersome warning lights?Remove the light bulbs?! Electric tape?Or....my favorite...maybe it will just fix itself??
The tire circumference is different, so you need to find out which ABS system you have and if it's reprogrammable, and because the difference also spoofs the speedometer, you'll need to have it reset for the new tires also. The red 'BRAKE' light came on only because the amber 'ABS' light came on.
Yeah the lights come on and stay on, without any relation to pressing the brakes. How would one go about identifying the abs system? I have a buddy that got some crazy OBD diagnostic tool off the snap-on truck a couple years ago. Maybe he’s finally figured out how to use it. Either that or it’s obsolete after two years.
WHEEL size is irrelevant. Only TIRE size matters. You can buy 15" tires that are larger in diameter than most 16" tires.
The factory wheels and tires were 265/70r16 what’s on there now are 265/70r17. Sorry i mixed up sizes in original post. So your saying i can take that extra inch out by getting smaller tires?
Math is your friend... The 265/70-16 tires are about 30.6" in diameter The 265/70-17 tires are exactly an inch larger in diameter. If you got 265/65-17s, they would be nearly the same diameter as the original tires and thus solve this problem.
Niiiiice. Thanks joe. One more bit of clarification. So the 265 is width? In mm? Then the middle number is height? From the wheel? How is the number determined? And then of course wheel size is the last #.
265 is the SECTION width (not tread width) in mm. 70 is the ratio of section width to section height, in %, so this means the sidewall height is 70% of the section width, or 0.70 x 265 = 185 mm. Smaller ratios mean a lower profile tire. Divide by 25.4 and you get a sidewall height of 7.3". Add the bottom sidewall and top sidewall to the wheel diameter and you get the overall theoretical tire diameter. This is only theoretical since tires are flexible. The weight of the vehicle compresses the sidewalls on the bottom of the wheel, so the actual rolling radius is a little smaller than theoretical. Some tire vendors actually list either the rolling radius or revs per mile, which are the more important metrics. And also, even section width is variable, since a different rim width will change the actual inflated section width. Most tire manufacturers will list the rim width used for their dimensional calculations.
