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| | | | Joined: Apr 2009 Posts: 181 'Bolter | | 'Bolter Joined: Apr 2009 Posts: 181 | Usually, front tires would've been a notch down in size from the rear if there was a size difference. However, based on the tires that I have available and not wanting to spend more tire money, would there be any technical problem with putting 9.00x20's on the front and 8.25x20's on the rear? When I got the truck it had worn out 9.00x20's all the way around. This is on a 1958 Chevy Spartan 80 2.5 ton (single rear axle). It would be nice to hear your feedback on this. Thanks!
1955 GMC 630, 1959 GMC W660, 1958 Chevy Spartan 80
| | | | | Joined: Jan 2008 Posts: 4,962 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,962 | There is nothing wrong with having a different size tire on front as the drivers. Smaller tires will cut your top speed some. If you actually haul something, 8.25 will haul a lot. Rock haulers used them here in the 60's because they were cheaper. It may look a little odd having 8.25 on the driver and 9.00 on the steer, but if you can live with that, there is nothing wrong with it. | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | May or may not need to adjust the caster angle.
Grigg | | | | | Joined: Jan 2008 Posts: 4,962 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,962 | I think he would have to have an awful short wheelbase to affect caster. If its a SWB, it will probably ride like a Teddy Roosevelt truck any way...a rough rider. | | | | | Joined: Apr 2005 Posts: 1,107 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 1,107 | a friend of mine has 9.00's on his 6400. when the wheel is turned the tire rub on the springs. | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | For an AD truck larger tires rubbing the springs and not turning as sharp is a concern, but I think on a 58 it's less of an issue? | | | | | Joined: Apr 2009 Posts: 181 'Bolter | | 'Bolter Joined: Apr 2009 Posts: 181 | Thanks for all the feedback! The truck is a long wheelbase: 192". The 9.00's on this truck don't seem to rub.
1955 GMC 630, 1959 GMC W660, 1958 Chevy Spartan 80
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