4th gen ABS w/different diameter tires
#1
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4th gen ABS w/different diameter tires
I have ABS on my car (fortunately or unfortunately, depending on how you look at it) and I'm wondering if putting taller tires in the rear is going to make the ABS go nuts.
Front would be stock sized SE tires (215/60/15 or 25.2" tall) and rear would be taller and slightly narrower (205/70/15 or 26.3" tall).
Front would be stock sized SE tires (215/60/15 or 25.2" tall) and rear would be taller and slightly narrower (205/70/15 or 26.3" tall).
#2
The difference is about 4%. Normal variation should be about 1-2%. So the ABS may think the rear tires are locking up a little sooner than reality. Then you may notice ABS activated a little more frequently than normal.
#6
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Originally Posted by dgeesaman
The ABS reads wheel RPM. It would never know that your tire is 25" dia or 40" dia.
Dave
Dave
I once had a tire shop screw up and mount 205-60-15 snowtires on the rear and 205-65-15 (correct size) on the front. That is approximately a 3.2% difference in diameter.
It made the ABS extremely sensitive. So much so that I pulled the fuse until I had a chance to get back and have them put the correct sized ones on.
JClaw, the 4.3% difference in your planned setup may be too much. The ABS may kick in as soon as you touch the brakes.
#7
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Originally Posted by Northern Maxima
Similar question (hope you don't mind JClaw!)...does rim size affect it?
This calculator is a useful tool for figuring out what will work.
http://www.1010tires.com/TireSizeCalculator.asp
#8
Originally Posted by dgeesaman
The ABS reads wheel RPM. It would never know that your tire is 25" dia or 40" dia.
Dave
Dave
#10
Originally Posted by Geophrum
on my Blazer it activates more often with bigger tires so i would assume the same would happen on the max too
#11
dont want to hijack the thread.. but on my truck all tires are the same size, rims are american racing rims.. if i put the origional rims and tires on the truck is fine.. but when i have the aftermarket rims and larger bf AT tires on my abs does kick in a little more during cold wet days
#12
so then with the space saver spare the abs must be all wacked out.
you may just need to remove the fuse if braking is irratic.
are you planning on driving daily with the miss matched tires?
you may just need to remove the fuse if braking is irratic.
are you planning on driving daily with the miss matched tires?
#14
Originally Posted by Geophrum
on my Blazer it activates more often with bigger tires so i would assume the same would happen on the max too
#15
ABS is likely to be the least of your problems.
I once tried putting larger tyres - not a lot larger - on the rear end of my TR6. (A fast 2.5L Triumph 2 seater sports car from the 70's). The handling went from great, to really, really scary. I've always kept the same size all round since that experience.
I once tried putting larger tyres - not a lot larger - on the rear end of my TR6. (A fast 2.5L Triumph 2 seater sports car from the 70's). The handling went from great, to really, really scary. I've always kept the same size all round since that experience.
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