Originally Posted by Joey D
Why would you get something so vastly different over the OEM size? It's really going to mess with your suspension geometry not to mention your transmission, odometer, and speedometer.
A 195/55/15 would make your speedometer read 8% to fast.
the S model came factory with a 195/65/15... when i went to my 215/50/17's the overall tire diameter was only half inch in difference... at 30MPH difference between the two tires is about 1 MPH... in my case fast.. when i show 30MPH on the speedo.. my actual speed is 31 MPH....
Comparing the 195/55/15 to the 195/65/15 the difference is 3/4 inch overall tire diameter.. which at 30 MPH is about 1.2MPH difference...
As far as being 8 year old tires... that is getting kinda old, but as long as they were stored correctly, out of the sun and the elements, they should be ok..
195 x 55% = 107.25mm
107.25mm divided by 25.4mm = 4.22 inches + 15 inch rim = 19.22 inches
19.22inches x 3.14 gives you a rollout of 60.35 inches per tire revolution
for the 5 speed cars... (if i remember right in 5th gear with a 3.85:1 axle ratio at 30 MPH indicated on the speedometer is 506 axle revolutions per minute..)
so 60.35 inches x 506 = 30541 inches divided by 12 = 2545 feet per minute
2545 divided by 5280 = 0.48 Miles per minute x 60 = 28.92 MPH meaning with these tires over his stock tires his speedo will read about 1.5 to 2 MPH fast.. which is negligable...
as far as suspension geometry and handling... it shouldn't handle any differently than an S model with 15 inch factory wheels/tires.. it wont handle as well as his 17's.. but.. still should be quite drivable.
and with the narrower treadface.. they'll handle snow better than the 17's..