Thought this might be useful. I've managed to squeeze my rear tyres into the front arches of my Z4 without audible scrubbing pushing as hard as I felt comfortable on bumpy roads. I used the OE 18x8.5 ET40 rear wheels, OE 255/35R18 Bridgestones & 7mm spacers. Both 5mm & 10mm spacers produced scrubbing on bumps with high lock at low-ish speeds. The car was a little understeery but I think this was because of the RFT front tyre and non-RFT rear tyres (245/40R18). I also was unable to get 245/40R18 tyres to fit at all without scrubbing even at walking pace.
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255/35R18 tyres on the front!
- Thread starter techathy
- Start date
techathy said:I was more wanting to find the limits on the inside (outside is easy enough) & now I know what they are... the reason?
Front - 245/35R18
Rear - 275/35R18
8)
On what rim sizes ?
Not 100% sure what you are trying to achieve or eliminate :?
mr wilks said:techathy said:I was more wanting to find the limits on the inside (outside is easy enough) & now I know what they are... the reason?
Front - 245/35R18
Rear - 275/35R18
8)
On what rim sizes ?
Not 100% sure what you are trying to achieve or eliminate :?
More traction.
I have gone up to 265 on the rear and it helps a lot. Does increase road noise though.
When I’ve sorted out my wheels I will be using a lighter wheel/tyre setup (by 2-6kg depending on wheel) that has a smaller rolling & natural radius. So that means what? Well the extra width should slow down the turn-in but the lower weight & smaller radius should increase turn in response. I’m hoping this will balance it’s self out. Steering feel also is tricky, feedback should be increased due to the extra tyre width but the smaller tyre radius should reduce it. Also the PAS system adds complication as it may well try to maintain the same apparent force for the driver, effectively neutralising any potential changes in steering feel.