Help please, new rims and esp playing up.

[jt1]

As it says in the title really, yesterday i fitted a set of merc rims 8x18 fronts 9x18 rears, since fitting them the esp has kicked in a couple of times for no reason at all just randomly in normal driving conditions, not even accelerating hard, help please,anyone got any ideas?

Cheers

John

[Saint Steve]

different size wheels front and rear??? surely isnt that the cause??

[SteveP]

different size wheels front and rear??? surely isnt that the cause??

I agree, a few years ago I ended up with different size tyres on a MK1 Leon Cupra, 205/45/17's on the front and 225/45/17's on the rear due to some crazy lease company cock-up, and even with this scenario I had the ESP kick-in randomly a few times before they changed the front tyres too.

[Hurdy]

Different size rims shouldn't matter as the rolling circumference would be the same with the same profile tyres. Even if you did put different tyres on and the rolling circumference was slightly different I doubt if it would be enough to bring in the esp. It could be possible that the fitters may have inadvertantly caught one of the ABS sensors.

[Hurdy]

different size wheels front and rear??? surely isnt that the cause??

I agree, a few years ago I ended up with different size tyres on a MK1 Leon Cupra, 205/45/17's on the front and 225/45/17's on the rear due to some crazy lease company cock-up, and even with this scenario I had the ESP kick-in randomly a few times before they changed the front tyres too.

Now that would cause esp to come in!

ps. are the profiles the same?

[jt1]

Cheers for the quick replys guys, i dont think it can be down to the staggered width as most manufacturers do this as standard on some of their performance cars.

The tyres are 215/35/18 fronts 225/40/18 rears so did'nt think that would be a problem.

Cheers

[Top Cat]

Cheers for the quick replys guys, i dont think it can be down to the staggered width as most manufacturers do this as standard on some of their performance cars.

The tyres are 215/35/18 fronts 225/40/18 rears so did'nt think that would be a problem.

Cheers

Can you post some piccies please of your new rimmage 

[jt1]

Cheers for the quick replys guys, i dont think it can be down to the staggered width as most manufacturers do this as standard on some of their performance cars.

The tyres are 215/35/18 fronts 225/40/18 rears so did'nt think that would be a problem.

Cheers

Can you post some piccies please of your new rimmage 

Will do in the morning not had time to take any yet

[Hurdy]

Now I see your problem.

The rolling circumference of the wheels needs to be the same front to rear, but yours aren't.

The fronts are 215/35 and the rears 225/40 which means the fronts will rotate faster than the rears. If the difference is out of normal operating parameters, then the ESP will cut in as it will think that either your front wheels are spinning up or that your rears are skidding.

The rears are the correct section tyres for the car.

[Spaced]

By my calculations (I could be wrong) the overall wheel and tyre diameter means the rears are 1.475 cm bigger than the fronts. I would have thought that this would also cause the tyre pressure warning light to come on as well.