Biggest tires on AP2 with stock 17' rims ?
04-23-2017, 01:17 PM
#22
Registered User
I run 225/45ZR17 on Front 255/40ZR17 rear 94Y - Handles great - make sure you get a rim with MEAT and not spokes or corner tweaking can send the wheel out of "true" - that's the price of looking cool
04-23-2017, 04:14 PM
#23
The question to ask is: what is your objective? Are you doing it for show or to be competitive in racing?
On OEM rims autocrossers run 245 front/255 rear, the rear limit partially on sizes available. In that case the rear has a slightly larger diameter and the front is squeezed beyond the manufacturers specs to fit. Some run 225/255, within manufacturers specs and raising the car about 1/4".
For street use, there won't be a discernable difference between 215/245 and 225/255 in performance. On a race track it would probably be in tenths of a second on a 50 second lap. That would be less than the difference between tire brands.
To get a 255 in the front requires lots of negative camber, a wheel with lots of positive offset, and maybe some slight fender mod. STR autocross cars run 255 fronts and are generally lowered over an inch. But the run over 3 degrees negative camber and 17x9 rims with +60 to +63 offset. They also typically have a large front anti-roll bar and very stiff springs, 700 lbf/in to 900 lbf/in in the front, further reducing movement.
On OEM rims autocrossers run 245 front/255 rear, the rear limit partially on sizes available. In that case the rear has a slightly larger diameter and the front is squeezed beyond the manufacturers specs to fit. Some run 225/255, within manufacturers specs and raising the car about 1/4".
For street use, there won't be a discernable difference between 215/245 and 225/255 in performance. On a race track it would probably be in tenths of a second on a 50 second lap. That would be less than the difference between tire brands.
To get a 255 in the front requires lots of negative camber, a wheel with lots of positive offset, and maybe some slight fender mod. STR autocross cars run 255 fronts and are generally lowered over an inch. But the run over 3 degrees negative camber and 17x9 rims with +60 to +63 offset. They also typically have a large front anti-roll bar and very stiff springs, 700 lbf/in to 900 lbf/in in the front, further reducing movement.
04-23-2017, 06:18 PM
#24
Registered User
The question to ask is: what is your objective? Are you doing it for show or to be competitive in racing?
On OEM rims autocrossers run 245 front/255 rear, the rear limit partially on sizes available. In that case the rear has a slightly larger diameter and the front is squeezed beyond the manufacturers specs to fit. Some run 225/255, within manufacturers specs and raising the car about 1/4".
For street use, there won't be a discernable difference between 215/245 and 225/255 in performance. On a race track it would probably be in tenths of a second on a 50 second lap. That would be less than the difference between tire brands.
To get a 255 in the front requires lots of negative camber, a wheel with lots of positive offset, and maybe some slight fender mod. STR autocross cars run 255 fronts and are generally lowered over an inch. But the run over 3 degrees negative camber and 17x9 rims with +60 to +63 offset. They also typically have a large front anti-roll bar and very stiff springs, 700 lbf/in to 900 lbf/in in the front, further reducing movement.
On OEM rims autocrossers run 245 front/255 rear, the rear limit partially on sizes available. In that case the rear has a slightly larger diameter and the front is squeezed beyond the manufacturers specs to fit. Some run 225/255, within manufacturers specs and raising the car about 1/4".
For street use, there won't be a discernable difference between 215/245 and 225/255 in performance. On a race track it would probably be in tenths of a second on a 50 second lap. That would be less than the difference between tire brands.
To get a 255 in the front requires lots of negative camber, a wheel with lots of positive offset, and maybe some slight fender mod. STR autocross cars run 255 fronts and are generally lowered over an inch. But the run over 3 degrees negative camber and 17x9 rims with +60 to +63 offset. They also typically have a large front anti-roll bar and very stiff springs, 700 lbf/in to 900 lbf/in in the front, further reducing movement.
04-23-2017, 08:26 PM
#26
05-23-2017, 09:01 PM
#29
05-24-2017, 02:49 AM
#30
I loved the RE-11A tires in OEM sizes (215/245). This time I went with S-04 tires in 215/255. Just 'cuz I was curious of the rear tire width made any difference. I'm not noticing any in fairly aggressive street driving.
-- Chuck
-- Chuck