Just out of curiosity, and since my 8-lug '97 GMC suburban is sitting right next to my GMC motorhome, and since I'm short a rim for a spare tire, I tried a tire off the suburban on the motorhome, and it fits! You guys probably knew that but it made me happy.

So my missing spare tire problem might be solved. It will stick out about 4 inches(?) compared to the original, but, for a spare it will get me down the road if I need it.

It's 245-75R16, pretty close to the same overall diameter, and it's E rated. Doesn't come anywhere near the calipers. The center hole looks to be the same as the hub.

I'll have to find some lug nuts b/c they are acorn style instead of the flat style, although I would probably just use the flat ones if I had to.

I'm just thinking that if someone was in a real bind and needed a wheel in a hurry, these GM 8 lug pickup / suburban truck tires are everywhere.

Sir: if you are planning on using an 8 lug straight 3/4 ton style wheel as a spare, it won't work well at all on steering axel. Even if you use the cone shaped lug nuts and get it clamped on tight and straight it will pull one sided so bad you will not be able to drive it hardly at all. Now if you carry 2 and run both fronts it will work.
You will be better off with a steel dish dually style16.5 as a spare. I have one in ETenn free for pick up.




tmsnyder wrote on Thu, 20 June 2019 16:57

Just out of curiosity, and since my 8-lug '97 GMC suburban is sitting right next to my GMC motorhome, and since I'm short a rim for a spare tire, I tried a tire off the suburban on the motorhome, and it fits! You guys probably knew that but it made me happy.

So my missing spare tire problem might be solved. It will stick out about 4 inches(?) compared to the original, but, for a spare it will get me down the road if I need it.

It's 245-75R16, pretty close to the same overall diameter, and it's E rated. Doesn't come anywhere near the calipers. The center hole looks to be the same as the hub.

I'll have to find some lug nuts b/c they are acorn style instead of the flat style, although I would probably just use the flat ones if I had to.

I'm just thinking that if someone was in a real bind and needed a wheel in a hurry, these GM 8 lug pickup / suburban truck tires are everywhere.

Just out of curiosity, and since my 8-lug '97 GMC suburban is sitting right next to my GMC motorhome, and since I'm short a rim for a spare tire, I tried a tire off the suburban on the motorhome, and it fits! You guys probably knew that but it made me happy.

So my missing spare tire problem might be solved. It will stick out about 4 inches(?) compared to the original, but, for a spare it will get me down the road if I need it.

It's 245-75R16, pretty close to the same overall diameter, and it's E rated. Doesn't come anywhere near the calipers. The center hole looks to be the same as the hub.

I'll have to find some lug nuts b/c they are acorn style instead of the flat style, although I would probably just use the flat ones if I had to.

I'm just thinking that if someone was in a real bind and needed a wheel in a hurry, these GM 8 lug pickup / suburban truck tires are everywhere.

What you have there is a true lug centered wheel with those conical nuts. People call things like Eagle wheels on a GMC lug centered and they are really not. You can get those nuts at most good auto parts stores. I believe they are 9/16"x18 . You might want to look up something that uses them and see what the torque should be. I think 140 is a bit much, but what do I know

Ken Burton wrote on Fri, 21 June 2019 06:34

What you have there is a true lug centered wheel with those conical nuts. People call things like Eagle wheels on a GMC lug centered and they are really not. You can get those conical nuts at most good auto parts stores. I believe they are 9/16"x18 . You might want to look up something that uses them and see what the torque should be. I think 140 is a bit much, but what do I know

If we were talking about Alcoa wheels, then 140 is the correct number. That value is stamped right on the Lug Nut that have a Pressed In Washer.