Hey all. Great forum here. I've enjoyed browsing quite a bit. I own a 1949 GMC 3/4 ton (4 speed with 4.57 gear) that has been restored to stock components...it's also now my daily driver and shop truck. 79,000 original miles and completely rust free...just didnt have the heart to change much. Anyway, have owned and restored many muscle cars and am own a motorcycle shop in Ga. Our specialty is high end customs, blueprinted engines, and EFI tuning but we also restore bikes as well. With a complete machine shop and sheetmetal fab shop at my disposal, it's hard not to go at this ol girl with a long list of upgrades...but I've refrained. LOL. My first post was in regards to fluids and here's what I came up with: Engine SAE 30, Trans GL1 Mineral 90 weight, Diff GL4 non syth 80W90, shock oil 10 weight. Now, I have to do something about the bias plys and stock wheels...please help.
As with anything else, can't really find a definitive answer. I love the bias look, but for a daily driver, it's not the best choice. I'd simply like to change over to a 1 piece steel wheel, paint it black, put the stock (or similar dish covers) on em, and a good radial tire. I've heard so many things at this point. Called Coker...they said order what you think will find and try it...but if installed, no returns so. What are you guys doing? Is there a simple bolt on wheel and tire combo that will work? I've also heard late 70/early 80 4WD, 1 ton 8 lug Chevy will bolt right on without spacers. Others have said I have to go with a 16" wheel...5.5 inch, 6 inch, 7 inch...... 225/70/15 or 225/65/16, etc.....so many answers. All that said....
Have any of you figured out the easiest and best combo for stock look that will bolt right on? Any help would be greatly appreciated. And I dont mid an aftermarket cap...I'll just put GMC stickers on them.
My '37 and '51 1/2 tons have Coker radials on them (original size 6.00-16) with stock wheels. I happen to love the original look, no whitewalls for me with the skinny tires and you don't have to worry about back spacing or rubbing tie rod, etc. The radials come with inner tubes because the stock wheels are riveted together and you don't know if they will hold air, although they often do. On both trucks it totally changes the handling and ride of the truck, compared to bias tires.
Thank you very much. I have 8 lug split rims. I have also heard you can run tube with radials on the split rims but honestly, I dont want to fool around with them. I would like to run the widest rim and tire possible and with that 4.57, gaining a little height on the rear wouldnt be a bad thing either. Current tire size is 7.00 x 15 which closely matches that 225/70/15 i mentioned.
Not sure about the size you need but I have been running Coker radials in the 6.50 x 16 size in my Chevy 1/2 ton. They require radial tubes according to Coker. My rims are powder coated inside and out so they would likely work with tubeless. The tires look like bias plys and have served me well for a few thousand miles so far and still look new.
Installed new tires and rims on my 1954 - huge improvement with the steering and handling! I really like the 29.5" tall radials that look like the stock bias ply. I'm running 40 psi and they ride good.
For reference, this is what I bought: Rims and hub caps from Jim Carter Trucks