hey guys.. just installed new rear tires on my rims.. 275/35r18.. when i left the shop my vdc kicks in @ 3500 in any gear.. i can drive with vdc off.. but cant go any faster than 50km with it on... anyone have this problem before? or have any ideas

 

I had the same problem when i was running 245/35 front and 275/30 rear. My rear had smaller overall diameter than my fronts. THis caused my vdc to go off every time. What series tires are you running in the front? IF your running 40 in front with 35 rears, than thats your problem.

 

tire matching size ~275x40x18 close to OEM

 

Yup, you got the wrong size tires. You should have 274/40-18. What size do you have in the front?

 

ohh ok.. i have 245/45r18 in the front.. just temp for now.. my front size is backordered.. have 255/40R18 ordered for the front.. hope this fixes my problem

thanks guys

 

i was told 255/40R18 and 275/35R18 was correct for my car by my dealer.. hope when my front tires come in this fixes my problem


thanks again guys

 

Nope.

255/40/18 = 26" diam
275/35/18 = 25.6" diam

Front is way taller than rear. VDC will definitely have problems.

I see this problem over and over. The rear profile usually have to be the same or larger than the fronts. The only way a rear profile is going to work is if it's a really wide tire.

 

The rear tires are 28 mm shorter than the front. Very common mistake.

 

It amazes me how a car dealership can be so ignorant of tire sizes.

 

The rear tires will be 11.5 mm shorter than the front. A simple tire calculator is smarter than I was told.

 

Most of the time, not just tires.

 

If you switch your current setup front to rear you will not have the problem...

 

...but you will have the oversteer problem instead.

 

LOL I am sure that it has been done before.

 

tsk, tsk, tsk, tsk. The dealer is FOS

Lou