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Old 12-03-2022, 06:16 PM   #9
1976gmc20
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Join Date: May 2015
Location: Montana
Posts: 3,696
Re: 2WD '99 OBS - Wheels?

Quote:
Originally Posted by hatzie View Post
The Nissan Titan wheels spec out with 77.8mm center bore and 2mm smaller lug studs. They supposedly will fit tho.

Nissan Titan 2004-2015
- Bolt Pattern 6 x 5.5" (6 x 139.7mm)
- Offset 25mm
- Center Bore: 78.1 mm
- Stud_Size: 12mm x 1.5mm

1988-2014 Chevrolet Tahoe, & 6 lug pickups
- Bolt Pattern 6 x 5.5" (6 x 139.7mm)
- Offset 25mm
- Center Bore: 78.1 mm
- Stud_Size: 14mm x 1.5mm

The 1981-1987 squarebody trucks had a 15mm offset rather than the 25mm offset of the T400 T800 & T900 trucks. A little over 3/8" difference.
Sorry - I don't know where those specifications come from but I just went out in the snow and measured the following:

1991 (squarebody) Suburban 6 hole 15" alloy wheel: ~3.75" from back of rim

GMT400 6 hole 16" steel wheel: ~5.75" from back of rim


About two inches difference!
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Current/past Chevy/GMC trucks:
1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD

Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner
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