ABS and different sized tyres?

[Dum-Dum]

How upset will my ABS be if I run with 195/50R15 on the rear and 195/55R15 on the front?

[E_KEL95]

Should still work but light might come on, I was running 55s on the back 45s on the front the light was on but worked 100% then when I got 45s all round light went off

[Toms306]

It doesn't work when the lights on...


I had 185/65/14 and 185/55/14 without any issues...so you may get away with it.

[Ben_w]

ABS will only activate if it detects a significant wheel speed difference between wheels. This usually occurs just before a wheel locks up.

The very slight difference in tyre size won't be enough in terms of rolling speed to trigger the system.

[Seb_Ryan]

ABS will only activate if it detects a significant wheel speed difference between wheels. This usually occurs just before a wheel locks up.

The very slight difference in tyre size won't be enough in terms of rolling speed to trigger the system.

It depends how its linked..and how accurate lol

It should be ok though

[Niall]

Chances are it will bring on the light however the ABS SHOULD still work as it will detect that both axles are spinning at the same speed. You may find though that if you have EBD (which on a rallye you won't) that it upsets that a bit.

[Dum-Dum]

Cheers boys.

[E_KEL95]

It doesn't work when the lights on...


I had 185/65/14 and 185/55/14 without any issues...so you may get away with it.

Well mines worked and it was like that for a good number of months 

[Toms306]

It should default to off when the light is on as a failsafe...

[Slam Wagon]

Im running 195/45 and 185/45 and it definitely works with no lights on.