tire size help
Thread Starter
Drifting
Joined: Jun 2005
Posts: 1,426
Likes: 1
From: brookville pa.
tire size help
hope someone knows the answer, right now i have 275/40/17 on front of 90 vette and 315/35/17 on rear i bought some 18 inch rims 10 for the frt/12 for the rear what size tire should i run frt/rear so to keep the same rake angle. the rears will be 315/30/18 or 335/30/18 so what size frt thanks for your help geo.
Safety Car
Joined: Dec 2006
Posts: 4,290
Likes: 6
From: St Marys GA
All you need is to keep the same overall diameter the same. That will preserve your rake as well as the speedo accuracy.
YOUR FRIEND
So, to keep your stock diameters:
FRONT: 285/35-18 (speedo will read 0.8% slow)
REAR: 315/30-18 (speedo will read 0.9% too fast)
335/30-18 will also work on the rear, with the speedo reading 1.0% too slow
Also, I realize the speedo isn't connected to the front wheels. It's just a reference for how much bigger/smaller the diameter of the tire is.
YOUR FRIEND
So, to keep your stock diameters:
FRONT: 285/35-18 (speedo will read 0.8% slow)
REAR: 315/30-18 (speedo will read 0.9% too fast)
335/30-18 will also work on the rear, with the speedo reading 1.0% too slow
Also, I realize the speedo isn't connected to the front wheels. It's just a reference for how much bigger/smaller the diameter of the tire is.
Safety Car
Joined: Sep 2002
Posts: 4,971
Likes: 9
From: The reason time exists is so everything doesn't happen at once
Go here and try any tire size combos you might want;
http://www.corvetteactioncenter.com/.../tirecalc.html
http://www.corvetteactioncenter.com/.../tirecalc.html
