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#1454284 Tue Jun 07 2022 03:13 AM
Joined: May 2022
Posts: 8
1958 GMC COI
I final got the truck bought and delivered. the first thing is the tires are all are mostly flat and dry rotted. on the side of the tires are marked 8.25 x 20. I sure they are split ring rims. will 245/70/19.5 fit my wheels. what about 10 or 11 x 20. Also it has a 370 engine any one know where I can get a manual for 64 year old truck? Im more use to cars from the 70s and later.

Roberts Big Hous #1454324 Tue Jun 07 2022 03:03 PM
Joined: Feb 2004
Posts: 26,953
Kettle Custodian (pot stirrer)
All the "XX.5" tires are tubeless, and require a different rim. They CANNOT be mounted on the wheels you have currently. The only tube type multi piece wheels that are dangerous and illegal to run are the Firestone RH-5 type that are joined together with a very narrow lip at the center of the wheel assembly. Wheels with a removable flange at the edge of the assembly come in various designs, and all of them are safe, assuming they're not rusty or damaged to the point that the locking sections don't mate properly. A professional tire shop that routinely works on heavy trucks and/or farm equipment will be able to evaluate your wheels and advise you on whether they are safe to use or should be replaced. Advice you get about wheels (including mine) from an internet chat room is worth exactly what it costs you to read it. However, some of us who post here have been working with multi-piece wheels and tube type tires for 50+ years, and we're still alive!

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Roberts Big Hous #1454466 Wed Jun 08 2022 07:10 PM
Joined: Jan 2022
Posts: 993
That 370 engine is a 371 Olds.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/13
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
Roberts Big Hous #1456795 Wed Jun 29 2022 02:40 AM
Joined: Sep 2018
Posts: 58
I’m 77. My uncle used to have a 63 one ton step side pickup with split rims. We had to find places with a rack made of pipe so the guys could inflate those split rim tires. The split rims were notorious for blowing off when they were inflating the tire. I understand wanting keep the old trucks correct but safety first. I’d try to find an alternate to those split rims.

Roberts Big Hous #1456837 Wed Jun 29 2022 01:27 PM
Joined: Dec 2001
Posts: 16,144
George, had a friend that was airing up a split rim and it blew apart on him. His jaws ended up being wired together for a long time. He "ate" through a straw what seemed like forever. He was really lucky it didn't kill him.............
Sad part is that he worked for Goodyear and a cage was nearby. Like a song says: "when will they ever learn"

So YES, SAFETY FIRST.... shout from the roof tops.

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