upping 35 to 40's on the back ok?

[greasyphil]

i have 19" rims with 35 profile tyres, i would like a bit more rubber between me and the road looks like i could fit 40 profile will it cause a problem with the traction control? with tyre wear and going round corners etc the ecu wont notice?

[greasyphil]

i forgot to mention, im thinking to replace only the rears with 40's as the fronts have plenty of tread

[BobbyZ]

Depends on the exact sizes fitted on both, but it could cause TC issues, yes.

[KyleR]

Your current F/R difference is 3%, if you upped it to 40 profile tyres on the rear it would be 7%, which is quite a jump. However, to the TCS it would appear the rear is rotating slower due to the larger rolling radius, so I am unsure how the TCS would react to that.

[Ekona]

Not worth the risk. Replace them all and make the jump even, or replace with the same.

[StevoD]

alsong as you jump both front and rear up to 40s you will be fine

[StevoD]

Well it will though

[peggers350]

so if you match 40's on the front to 40's on the rear it should be ok? my current setup is 235 40 19 an 275 40 19 on the rears but currently not fitted yet. was thinking the same thing if it will throw the traction control out

[BobbyZ]

The height of the sidewall profile * tyre width profile is given as a percentage, so 235/40 means the sidewall will be 235 * 0.4).

 

You'll need to calculate the difference that you're going to create from standard, and find out what the tolerance of the TCS is to determine if you'll cause issues.

 

This might help:

 

http://www.willtheyfit.com/#isPage=1