[firemen122]

I have a 02 dually 4x4 4 door with 4.10 l/s I would like to run a tall and skinny tire to offset low gears I now run a lot of open road driving some suggestions please...... thanks /ubbthreads/images/graemlins/smokin.gif /ubbthreads/images/graemlins/smokin.gif

 

[SmokeyWren]

The perfect tire for your needs is LT255/85R16. Several folks make them, including BFGoodrich MudTerrain, Cooper Discoverer, and Dunlop Radial Rover.

The 285/75R16 is a little shorter and a lot wider than the 255/85R16, and might rub between the duals - which is a huge no no.

Your 4.10 rear end will "feel like" a 3.90 with the 255s.

And if your speedo and odo are accurate now, and you don't have it calibrated for the taller tires, then they will be about 4.8 percent slow with the taller tires. I.e., 70 MPH indicated will be 73.36 MPH on Officer Bob's radar. And 400 miles on a tank of fuel will be 419.2 actual miles.

 

[JimTJr]

Smokey,, so if I was going to replace my tires soon, would you reccomend the 255 over the 265? Since I wont REALLY NEED the 410, it would help fuel milage just a tad wouldnt it? Torque should not be an issue,,with these motors, and I will have my BTS in the dually in a couple days!
Will they look alot different?

ANYone have pics of the 255s on a dually?

Thanks Smokey!

 

[SmokeyWren]

[ QUOTE ]
Smokey,, so if I was going to replace my tires soon, would you reccomend the 255 over the 265?

[/ QUOTE ]

On a Dooley? Yes. Your wheels are 6" wide. The 255/85R16 needs 6.5" or wider wheels, but lots of folks get by with them on stock Dooley wheels. But the 265/75R16 requires 7" or wider wheels, so your stock wheels are simply too narrrow for those tires.

[ QUOTE ]
Since I wont REALLY NEED the 410, it would help fuel milage just a tad wouldnt it?

[/ QUOTE ]

Maybe a tad - provided you have a calibrated speedo so your computations are accurate. Because the taller tires should help unloaded fuel mileage. But the 255s are wider than the stock 235s, and the wider will hurt mileage some. I suspect you will just about break even on fuel mileage.

[ QUOTE ]
Will they look alot different?

[/ QUOTE ]

Beauty is in the eye of the beholder. 4.8% is not enough difference to turn me on, but then I like my stock-size XPS Ribs. /ubbthreads/images/graemlins/cool.gif

[ QUOTE ]
ANYone have pics of the 255s on a dually?

[/ QUOTE ]

MarkR (Mark Roach), one of the Houston-area guys that has also attended several Texoma get-togethers, had a new 2001 Dooley with LT255/85R16 tires and a leveling kit on it back in 2001. He brought it to the 2001 Texoma Get-Together. I thought it looked great. Darling Wife called him for you, to ask where he has a photo of the Dooley posted, and he said the only place might be the NTxPSA photos of the 2001 rally. His current ride is a 2003 SRW, but that won't help you.

To find the NTxPSA website, search for username Sid_M in the Events and Rallies forum, then open one of his posts. The link to the website will be in his sig.

 

[JimTJr]

Ok,, DUH, I was thinking of the stock tires being 265s,, UM like on the SRWs,, forgot that 255 would be bigger than my 225/70s...do they make a taller series in the 225s?
Guess my best bet would be RICKSONS,, and commercial tires, huh? LOL
BIG BUCKS!!!!

 

[SmokeyWren]

[ QUOTE ]
... forgot that 255 would be bigger than my 225/70s...

[/ QUOTE ]

If some idiot put 225/70R16 "car" tires on your Dooley, then you have short, wide tires. LowRider? Only 1,819 pounds weight capacity @ 35 PSI. 727 tire revs/mile. 11 percent less revs/mile than stock LT235/85R16, so your 4.10 rear end acts like a 4.55. Very short legs. Yes, you need longer legs and more weight capacity.

[ QUOTE ]
...do they make a taller series in the 225s?


[/ QUOTE ]

If you want shorter than stock tires, most major brands make LT215/85R16E, including the fantastic Michelin XPS. They were stock size on '99-up Dooleys with XL trim until around 2002 model year. 681 revs/mile, so they are 4 percent shorter than stock 235/85s. Your 4.10 will feel like a 4.26, which is a lot better than the 4.55 with your 225/70s. /ubbthreads/images/graemlins/eek.gif

But I would go with either stock size LT235/85R16 or one size taller 255/85R16. The advantage of the 235s is that "everybody" makes them. Only a few manufacturers make the 255s, but a really good one is the BFGoodrich MudTerrain T/A KM. Click here. Another excellent choice is the Cooper Discoverer S/T. Your Cooper dealer will probably have to order that size, but he can get them in a day or so. http://www.coopertires.com/Flash/index.aspx

 

[389sixpack]

The 255s will give an inch more diameter, but they also have an inch more section width over the 235s. If you go to 255s then to keep rubbing risk down, you will probably have to go with about ~.5" spacer or larger.

 

[SmokeyWren]

[ QUOTE ]
If you go to 255s then to keep rubbing risk down, you will probably have to go with about ~.5" spacer or larger.

[/ QUOTE ]

MarkR ran Cooper 255s on his Dooley for about a year, with no rubbing between the duals. And Mark is one of those that works the heck out of his pickup. /ubbthreads/images/graemlins/cool.gif