RGV_Z28

iTrader: (7)

I just switched to prostars all around, and now whem I'm driving, my "brake" and "abs inop" lights come on. Any thoughts?? Thanks guys.
-John

trackbird

iTrader: (4)

If the ABS unit sees a constant difference in tire rotation speeds, it begins to wonder if you are driving on ice, or if there is a problem, so it turns on the light. The ABS is designed for 4 tires of equal diameter, you no longer have that and the system won't work properly.

RGV_Z28

iTrader: (7)

But it doesnt hurt the cars performance or anything right??

keliente

iTrader: (22)

No you just won't have ABS or ASR.

Doski

Same problem here!! Can you do anything? Strange thing is i drove with my wheels for a long time before the light came up....

LAST OF THE BREED

Exact same thing happened to me lastnight...last time my ABS INOP light turned on it was my rear speed sensors...but this time it happened when I put on all 4 of my prostars...and the BRAKE light is on as well...kinda scary for me not having my ABS working...n e one know of n e thing that can be done to fix that?

trackbird

iTrader: (4)

Get wheels that are the same over all diameter? I don't know of any way to trick the electronics into seeing matching speeds (which would turn off the light and restore ABS operation). I'm amazed that nobody designed and built a "converter" for that purpose.

warpwr

Oddly enough, Corvette's use unequal wheels and tires. Maybe there is some part swapping ability in there somewhere, somehow.

trackbird

iTrader: (4)

I'd have to look, but I don't think the overall diameter is different on them. Like the 245/50-16, 275/40-17 and 315/35-17's are all the same diameter. You can run them in any combination with no issues. I think the Corvette uses different wheel diameters, but I think the overall height is the same (off the top of my head).

Xsta Z 28

iTrader: (2)

FYI, the OD of the tires and wheels on the C5 and C6 Vettes are different.

The ABS on the Vettes is designed for the different tire speeds, F-Cars the ASB expects the tires to be close to the same OD, so when the tires are majorly different +/- 1/2" the ASB thinks there is a problem.

trackbird

iTrader: (4)

I stand corrected. Thanks!

nick_s

iTrader: (11)

The lights will come on if there is over .625-.750 difference in tire heights front to rear. - I think it actually depends on rollout but the heights are the easiest way to tell.