I have a f350 dually and just got a set of 265/75/16 tirs was wondering if they would fit on the back without spacers

 

I believe they will but, when loaded heavy the centers will tend to rub. I just bought new tires myself. Wanted the 285-75R-16 but went stock. Every time I say I'm going bigger but haven't. They need spacers for sure. I like the steel ones best.

 

I run them , as long as they are 10 ply rated , And new Mischlins next week. Well over the 70k milage.

 

jchamb11, the 265 or 285 tires? I also run Michelin's and they are the best for miles out of are trucks so far. What's the gap between the tire's? All I have heard for years is they rub each other when loaded heavy or towing heavy. I've always run stock 235's.

 

265 75 's 16 on my dually, Ran 285 75 on my srw f350 . the space looks to be more than an inch and one half . A bit hard to put a scale on it.

 

I run 265's up front & 235's out back. I have run 265's on the rear but they were too close for comfort. I haul heavy...

Here is what they looked like with no load 80psi. (Mich LTX's)

 

That's what I thought to Franko. That's why if I ran bigger tires I was going with the steel spacers. I wanted to run the 285's just to bring my gear ratio down to 3.73 from 4.10 LS. I figured it would help MPG when unloaded.

 

I would love to have a more highway friendly gear ratio myself. I'm seriously thinking about re gearing to 3.73 since no one makes a 3.90 for a Dana 80. (
I have heard too many horror stories about spacers breaking. I just don't trust em.

 

That's why I said steel spacers. Have family and friends with them and know problems at all. Its funny, when I bought my e99 DRW you couldn't get 3.73 with LS Diff. Are trucks look to be the same except mine is tan & 4x4. Love your trailer Frank. My wife likes the toy hauler so we can carry ATV or golf cart. Did that NVK5 pcm make that much difference? I have one I never installed. It has one of DP 40 tow tunes on it. I still use the F5 so far. I want the 205/100 new injectors, we'll see.

 

Frank are running 265/85R16 or 265/75R16 up front on the steers? I agree with you and Chet about the 4.10 gears aren't the most friendly on the highway. Now since you have a E99 maybe you or Chet might know if it was the E99 Dana80 had to have the narrow 3.73 ring gear. Because if I recall correctly a standard Dana80 ring gear was too wide for the E99?? Does that sound right it has been a long time since I looked into gears. But it makes me wonder if that holds true if you go with a Detroit Locker or maybe just use a center section of a Late99 to '03 Dana80 ? I think when I get near 300K I will start to look into it deeper.

Now as far as using spacers on the rear I too say "Don't do it !!" Because the way the rear hub on a Dana80 centers the rim. With a spacer a the rear outer rim does NOT sit on the shoulder of the hub correctly. Due to the Dana80 being a hub piloted wheel. I think this will explain it better than I can.
Alcoa Wheels North America: Technical Service: Dual Rear Wheel Mounting Instructions & Fitment Check

 

I'm running 265/75's on the front. Same height as the rear 235/85's

I remember reading somewhere that the 3.73 uses a different carrier than the 4.10's, so you cannot just swap the gears. IIRC

 

I need to know how I can change out the split rims to regular rims. They are 7.50 16 lt. Do i have to change out the hubs? 6 lug. Its my dads and im fixing it up for him. Please help me. If i can find regular tires for it.. It would not be an issue. But no luck in this area. Thanks in advance.

 

I run Michelin 265/75/16 E Range tires on stock wheels with no spacers. I pull a gooseneck often.

 

If you are looking for a diameter increase run a 255/85/16, they will fit on stock dually wheels an gain you a couple inches of diameter WITHOUT RUBBING. They are actually a hair bigger in diameter than a 285/75/16