QUOTE(ZeroSP @ Feb 4 2012, 07:43 PM)
So the GYF1 A2 is really so good in both wet and dry eh? Last time when I decided between PS3 and GYF1 A1 (That time only A1) I went for PS3 because got better deal...
How about the sidewall comparison? Since PS3 is known to have softer sidewall that is not good for heavy corner whacking...
A soft sidewall actually helps to make the contact area of the thread stays the same when cornering. A hard sidewall means the opposite sidewall's thread area actually lift up when cornering, means there is less grip when hard cornering. And uneven wear will easier to occur for harder sidewall compare to softer sidewall.
For hard cornering it is always better to use very low profile tyre, but of coz that means it will be very expensive. So we only have choice of higher profile tyre of either hard or soft sidewall, less contact point (less grip) without feeling of flexing or more contact point (better grip) with some feeling of flexing.
QUOTE(Vcys86 @ Feb 5 2012, 08:32 AM)
Hi,
Would like to get some advice from sifus here.
My car (Gen-2 CPS), one of the its rim has been damaged (uneven cover on the tyre), which cause its tyre pressure keep on dropping overtime.
about 2kpi/day.
Since it is stock rim and stock tyre (almost 4yrs usage, almost 5 yrs from production date, it does consider old right?), I am thinking to change all 4 rims and the tyres as well. Should i?
Can i change to the original rim size +1 inch ? and the tyres +1inch as well? Is it stock come with 15"? any setback if i do this way?
Any suggestion/input on my above issue would be greatly appreciated. (rim,tyres,shop recommendation,etc.) Thanks.

of coz can up 1 inch. See the First page, got the rim size calculator. Check your tyre profile and then see the calculator what profile will match your car if up 1 inch.