Just changed from Goodyear Eagle F1 GS-D3's (225/45-R17) to Yokohama AVS Sport (235/40-R18). Believe the Yoko is stickier than the Goodyear, and has a stiffer sidewall.

One thing I noticed instantly was that the car had a tendancy to follow the road crown and tramline more easily. On a similar stretch of road, the car would drift down the crown much quicker than before - alignment settings were untouched.

Would we say this is due to the:
1. 40 vs 45 profile,
2. stiffer sidewall,
3. 235 vs 225 width,
Or a combination of all 3?

Cheers.

Can't explain why but my experience is that stiffer sidewalls tramline eg Bridgestone Potenza.

All of the above, although the stiff sidewall is the big factor.

I had the same thing with Yokohamas. They were on the car when I purchased it a year a go. Now got Dunlops on. I get a tiny amount of extra road noise, but no tramlining.

Quick question........

What is Tramlining?

It's when the car wanders on the road. That is it will try to follow any dips for example where road works have been and repair has sunk. Hope that answers your question m8



SS

Many thanks SS.

Have noticed that happen myself on my current 17" Bridgestone S-02 boots, however much prefer a little "tramlining" but with fantastic grip to the old Pirelli PZeros which I don't remember tramlining but made a guessing game of cornering.

Ive just gone from F1's 205/50/16 upto Potenza's 225/45/17 and the difference is unbelievable, tramlining is awful.