TCS LIGHT/ Wrong tire size?

[THATS4RACIN]

Maybe someone out there can help me out. If I have 275x35x18 on the rear what size tire do I need in front (on 17"rim) to put the TCS back inside the parameters? I have 235x40x17 on there now and the light comes on about 75% of the time duting medium to hard acceleration. Also....does the TCS track speed of the front only or the rear or both? Any help would be appreciated.
Make the light stop!!!!!....

 

[D'Ecosse]

I'm surprised you can fit a 235/40 in there - did you have to remove the fender liner? How wide are your rims?
215/40 is typical fitment on an NSX front with 8x17 wheels & this should not give you any TCS problems directly with those size rears, unless there is another cause to the problem.

 

[nsxtasy]

TCS operates based on differences in rotation rate between the front and the rear.

While I am not so sure that your sizes should set off TCS, I too recommend getting 215/40-17 for front tires.

What year is your car? What brand and model of tire are you using?

 

[THATS4RACIN]

Thanks for your replies. The falken F451's 235/40/17's on the 8 do rub on the fender lining when going around sharp corners but I can temp. deal with that. I will be trying a set of 215's when they come in at the tire store and see if they will keep the TCS light off. The car is a '91 . Thanks again for your input.

 

[nsxtasy]

Falken tires are also notorious for being significantly larger than other brands of tire in the exact same size. That means that even when you are asking for a specific size, how big they are is something of a crapshoot.