Wider tires??
03-15-2006, 11:01 PM
#46
Instructor
Join Date: Dec 2005
Location: New Hampshire
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How is the ride on 18's compared to 17's?? I have heard it makes a big difference. I have stock rims now, but have been looking at 17's, but it seems hard to find 17's with a big enough off set, 18's seem to have the right off set most of the time.
This is a perfect thread for me, the wheels and tires you just got and put on is exactly what i wanted to do, and yes, looks too high.....
This is a perfect thread for me, the wheels and tires you just got and put on is exactly what i wanted to do, and yes, looks too high.....
03-16-2006, 12:58 AM
#47
Rennlist Member
Originally Posted by Jim R.
Welcome to the "slippery slope" of SC'd 928 ownership. 
When I had nice new 255's and my SC, no traction until 4th gear. So there came the Fikse's, 295's (255 up front), now time for a clutch, x-pipe.........
Jim
When I had nice new 255's and my SC, no traction until 4th gear. So there came the Fikse's, 295's (255 up front), now time for a clutch, x-pipe.........
Jim
03-16-2006, 02:42 AM
#48
Rennlist Member
Thread Starter
Originally Posted by nhporsche87
How is the ride on 18's compared to 17's?? I have heard it makes a big difference. I have stock rims now, but have been looking at 17's, but it seems hard to find 17's with a big enough off set, 18's seem to have the right off set most of the time.
This is a perfect thread for me, the wheels and tires you just got and put on is exactly what i wanted to do, and yes, looks too high.....
This is a perfect thread for me, the wheels and tires you just got and put on is exactly what i wanted to do, and yes, looks too high.....
The tires actually look better with 30 psi 
I think the 255's were a better match!!
03-16-2006, 08:40 AM
#49
Drifting
255/40/17 are ~21.016" tall
275/40/17 are ~21.331" tall
So there is really only ~5/16" difference in height, not all that noticeable. But the perimeter of the tire, 66.02" to 67.01" throws off your speed-o.
At the track on my 225/45/17's and 255/40/17's I run about 38psi cold to get the least amount of roll over on the tire, though I still get to the arrow tips so I know I'm using the whole tire.
On the street I run them at 35psi and have very even wear across the tire.
Go figure.
275/40/17 are ~21.331" tall
So there is really only ~5/16" difference in height, not all that noticeable. But the perimeter of the tire, 66.02" to 67.01" throws off your speed-o.
At the track on my 225/45/17's and 255/40/17's I run about 38psi cold to get the least amount of roll over on the tire, though I still get to the arrow tips so I know I'm using the whole tire.
On the street I run them at 35psi and have very even wear across the tire.
Go figure.