Kev38
New Member
35 is % of the width.
sorry Loshi but I don't understand what that means ? Can you dumb it down for me
Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
35 is % of the width.
Honestly if it were me, I'd be going the 245/35 for 2 reasons....Easier to obtain, and cheaper and 2ndly it is a factory fitament....
245/35, wall height =35% of the tyres width. So if you have a 265/35 it will be taller because it's 35% of the width of the 265.
I'd be punching those figures including rim size into a calculator and seeing if the OD changes much from the stock 245/45/18s. The SS is already too tall gear wise and unless you plan on a regear it will only be worse than it is now.
Righto, so I've read on a thread here somewhere (or maybe it was elsewhere ?) that supposedly anything under a 3% overall diameter variance from the factory fitment should not cause any issues with the braking system and other electronics. Is this accurate from your experience as a wheel and tyre guy ?
Ok sure got it, thanks - but what does that mean to my equation of potentially pairing the 265/35 rears with 245/35 fronts. Ok -Good ? or Bad idea not good?
Factory HSV fitament was 245/35X20 on the front and 275/30X20 on the rear....This means no issues with electronics
The issue is the HSV have shorter gears than the SS. This will mean the shift points may be affected in the trans, plus the speedo will be out. This is all assuming the OD is larger than what a stock SS has with 245/45 18s. I have never used a calculator other than a desk one to work out ODs.
I tried doing a manual calculation and it would seem a 265/35/20 is smaller than a 245/45 in an 18. But I may have miscalculated.