Hey guys. I have a quick question over here, my rear tyres dyed on me a week ago so I had to get a replacment, ever since I fit the following replacement, the car started losing control on high speeds (eg. 120 KMH or 75 MPH), while stepping on the accelerator and slightly swerving the car to the right, I can feel an insane loss of control as if I'm madly steering to the side on such high speeds, it's the same feeling you get when your VSA is off and your trying to drift or something.

The set of OEM rear tyres that i had when i got my S2K are, 245 40 R17 91W
The new set of rear tyres i have now are 235 45 R17 96W

Is the problem in my car cause by the difference in the tyres? Cause i took the car for wheel alignment at Honda and they said you gotta pitch in a ridiculous 650 USD for a pair of new rear tyres to fix the problem. I would really appreciate your help guys as I already paid 400 USD for those new incorrect tyres.

 

Sell the ones you got, and take the difference and put it towards the proper size tires. The $200 difference is peanuts compared to the peace of mind when driving as well as potential deductible you will be coughing out in the event something happens and you do lose control of the car.

my $.02

 

Thanks for replying back Mocky, I agree with you on the fact that paying more now will push away further worse problems that might arise. However, do you think correct fit tyres will solve the problem of losing control or could it be something else that's causing the problem?

 

You did get an alignment performed, correct? What are the specs? Honda's price gouging the stock tires. What do you have on the front?

You should have 245/40s on the rear (at least), not 235/45s

 

You paid $200 each for 235/45/17 tires??? How? Why?

And to more directly address your problem, the size of the tires wont' cause your vehicle to do this. It sounds like either one of the rear tires is *bad* or the alignment of the car is off.

 

If both rear tires are the same size, I cant imagine it doing that . Check the air pressures? I still recommend going to the 245 as well

 

air pressure differences from left to right should be spot on. half a psi difference is enough to cause an s2000 to behave like that but of course it could be an alignment issue

 

some options to consider..


(ignore all the dribble through the middle)

https://www.s2ki.com/s2000/topic/869...#entry21177988

 

They're narrower which doesn't help but, as stated above, that's probably not the cause. Keep this in mind:

http://www.tirerack.com/tires/tirete...e.jsp?techid=5

 

Thank you guys for your helpful replies. I have bought the correct tyres for my S, they were 245 40 R17 and replaced them with the incorrect ones that had, this completely solved my problem and decreased the loss of control to a minimum. I'm sending the car back for a wheel alignment again and hopefully the entire issue with be resolved. Can't believe how critical wheel size is when it comes to this car.