biggest tire for stock rim/ fuel mileage

[swampbug74]

What are the biggest tires you can run on factory rims and not make your truck look dumb. i was thinking about 33's or something along that line. also if you have a 4:10 rear will the bigger tires hurt or improve fuel mileage?

 

[Dave MacArthur]

Swamp-
I'm running 255/85's. They are 33. 5 inches tall. I think they look just right. Check around but I think these are the biggest (widest) tire that is recommended for the stock rims. Many people are running bigger sizes on the stock rims but I am talking about the tire manufacturers recommendations. I have the 3. 55's and my mileage is the same (after correcting for the spedometer error).

 

[Dave B]

I'm running 255s also, for summer hwy use... ... 285s in fall and winter, and have 4:10s. The 255s being skinny hwy tread get me about 22. 5 mpg if I keep it around 62mph (adjusted). I can get 19. 5 or a little better with the 285s, but since I have them on during winter months, maybe the type of diesel has something to do with the lower mpg.

 

[Ted Constantine]

Largest stock 295/75 16
widest with out rub is 305/70 16 but I think that is because they are shorter than the 295/75
I am running 255/85 16 BFG MT's which at 33. 3inches tall as per BFG but I don't have good MPG data and the MT probably robs a couple MPG

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2001. 5 2500, quad cab, 4X4, ETH/DEE, 4. 10 LSD, 255/85 BFG MT, BD Exhaust Brake, JRE 4" exhaust, Leer topper, Piaa driving 510's in bumper, Line-X, Stereo= JVC KD-MX3000, MBQuart 6. 5 components in front doors, 6. 5 coax in rear, JL Audio Stealth Box sub in center seat, Fosgate 400a4 and 250a2 amps, DynaMat everywhere

 

[swampbug74]

What are the difference between 265/75/16 and the 255/85/16. is just alittle wider or taller. what about 32/12. 5/16 BFG. 33'S. can you put 10 inch wide tires on stock rims. thanks