Originally Posted by
HidetoshiNemoto
Thanks for the valuable information, does it mean if I use sets of wheels which has smaller offset and that sits further out (which is almost equivalent to using wheel spacers) would upset the car's handing? I always though less chassis rolling can be achieved if wheels are sitting further out.
You are right in thinking it reduces chassis rolling. But that difference is really small as it is the track width versus the height of the centre of gravity, and the difference on the track width is not much compared to the total track width. But the negative handling is caused by the difference is scrub radius. The scrub radius is the distance between the centre of the tyre and the point where the tyre rotates when the steering wheel is turned as is very important for the steering feel. I don't know how much the normal scrub radius of the 4x4 Cosworth is, but on most cars it normally is something like 0.5 to 1 cm. Adding wheel spacers of 1 or 2 cm changes it a lot and doesn't help the handling.
BTW, I have 17x8 wheels on my 4x4 Cosworth with big brakes. The tyres are 215/40, but the front and rear arches indeed have been rolled.
