Tire/wheel recommendations

[Racer 238]

My only point was that the term "offset" is just a waste of time when searching for wheels. Backspacing is what is important. Let's just say OP is looking at all sorts of wheels, 16x7 through 17x11. The amount of allowable backspacing is a set distance, you can only go so far. So if searching through all the various wheels available, do you want to do math for each wheel to figure out which offset may or may not fit, or do you just want to look at the backspacing spec?

As I said earlier, 4" +/- 1/4" is a pretty safe bet when giving advice on the internet. You can get away with a little bit more, depending on 1/2 ton, 3/4 ton, 1 ton, wheel diameter and composition. So if someone really wants to stuff as much wheel and tire as they can under their truck, they need to get out and use a tape measure to see how much backspacing they can get away with.

Yes, backspacing and offset are basically the same thing. But, one requires math to know if it fits your needs and the other one does not.

Oh, and even the factory narrow (15x6, 16x6.5 and 16.5x6.75) steel wheels have around 3.75" backspacing or so.

I ended up ordering 16x10’s -25. The specs say they have a 4.50” backspacing with 315/75 16’s. Hope they fit.

 

[Craig 85]

I ended up ordering 16x10’s -25. The specs say they have a 4.50” backspacing with 315/75 16’s. Hope they fit.

Sorry late in the game here. The grey/silver truck was my '79 K15 that came with an old/stiff Rancho 4" lift. Back then it was wearing 15x10" wheels with 33x12.50x15's. The front fenders were trimmed when I purchased the truck. I went to a 4" Tuff County EZ Ride lift when I did the 3/4 ton axle swap. Tires were 33x12.50x16.5" and the wheels were old school 9.75x16.5". I believe those wheels had 4.75" of back spacing. Those 33" tires were actually 32.8" tall. With the softer suspension, I had no rubbing issues, but I think a 35" tire with that wheel would have.

My '85 K30 has a 3" lift, equals 5" on a 1/2 or 3/4 ton due to the frame height differences. Tires are 305/70R16 (32.8" tall) and 16x10" wheels. These wheels have 4.5" of BS. I would guess I could run a 35" (315) tire without it rubbing.

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