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wellsdesigned

Above the Sacramento Fog, CA

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Posted: 09/29/04 08:02am Link  |  Print  |  Notify Moderator

"Here's another question, can you recommend some good resources for researching 16" rims that use 5 lugs? My Dodge uses 5 lug 15" rims and in order to get over a Load C tire, I need to go to 16"."

I did a lot of web searching and of course I searched this forum, but in the end, it was a visit to my local Big-O tires store and a talk with a salesman in front of a big book of rims that found what I wanted.

An important thing about buying new rims, when they arrive, check for a load rating stamp on them. I ordered some new rims that were rated for 3900 lbs according to the book. They arrived with a stamp rating them at 3000 lbs. The tire store employee tried to convince me to trust the book, I took my business to another store.

Here's what I ended up with on my truck:
Alcoa Classic 16"x7" Rims (3750 lbs capacity)
Michelin LTX M/S 265/75R16 (3415 lbs capacity)


2002 2500HD 4X4 Ext. Cab 6.0L V8
2004 Eagle Cap 850 Camper w/slide-out

Visit my Truck Camper Travels site.


Happy Jack

Winnipeg, Canada

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Posted: 09/29/04 11:15am Link  |  Print  |  Notify Moderator

Quote:

ramlinwillie,
I believe your rear axle is 6,830#. That's the specs for 2004 F250s and F350s according to the 2004 Super duty brochure. [emoticon]


I suspect that is also a tire rating, not an axle rating. 2 times 3415 is 6,830. (3415 is the norm for load range E , 16 inch, 265 mm tires.

If you can find out who makes your axle, you can find the real rating, not the one the vehicle manufacture assigns to it.


2004 Silverado 2500HD Crew SB 4x4 6.0, Rancho 9000
Michelin LTX 265 75R16E, Torklift Tie-Downs, Timbrens
2004 Adventurer 810ws by Western Canada RV.


Mich F

Plantation, Fl

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Posted: 09/29/04 06:15pm Link  |  Print  |  Notify Moderator

OK,
I just went out and checked my 2004 F250. The sticker says the rear axle is rated at 6084# and that's with the 265s which is what I have. Still the brochure says 6,830# rating for that rear axle. They list the front axle as 4,850# (just went out again sticker on truck says 4,100#) for the 4x2 and 5,200# for the 4x4. So we're looking at F250s that according to the brochure have at least 11,680# of axle capacity and over 13,000# of tire capacity (if the 265s are run @ 80PSI). All that gives you a GVWR of 8,800#. I guess the springs, schocks, brakes and whatever else is involved in figuring out the GVWR aren't very HD. [emoticon]


2014 Itasca Spirit 31K Class C
2016 Mazda CX5 on Acme tow dolly- 4 trips ~ 5,800 mi
Now 2017 RWD F150 with a drive shaft disconnect

baby beluga

healdsburg,Ca. us.

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Posted: 09/29/04 11:31pm Link  |  Print  |  Notify Moderator

wellsdesigned--I am running Rickson 19.5" (4500 lb. rims) with Michelin 225r7019.5 XDE load range G tires. They are only slightly larger in diameter than the stock tires. My speedometer is very accurate (by GPS) with them. My truck also handles much better than with the stock BF Goodrich load range E (3415 lbs) tires--and I now have an additional 1100 lbs of tire capacity on the rear--a good safety factor. My rear axel weight is about 6,800 lbs. and my wet gvw is 11,500. I am running a Ford 350 ps 6.0 CC 4x4. with a 8'11" Bigfoot.


'04 Ford 350 SRW-6.0 Crew cab, short bed-King Ranch. Firestone airbags, Rancho 9000's, 2003 Bigfoot 8'11 camper

Capt. Caper

CapeCod

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Posted: 09/29/04 11:42pm Link  |  Print  |  Notify Moderator

I believe his axle is 6084. I had the same thing on a 01 F250. The 3415 tires were an option.

The 350 has the higher axle rateing because of the way they installed the spring hight for one. If you look at the 350's and you'll see the difference in the blocks it sits on.

The only difference between a 350 and 250 isn't just the tires.

Capt.


2011 F350 Super Duty,SRW, 6.7 PowerStroke,Crew Cab,Lariet,4x4, 3.55 Locking Diff ,Short Box.Timbrens,Happy Jack's, Gator Guard bed liner, Penda bed mat.
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ramlinwillie

Littleton CO

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Posted: 09/30/04 01:24pm Link  |  Print  |  Notify Moderator

Capt. Caper
I think it’s just a little funny how they place a sticker on one that’s totally different in weight ratings then the other. From Specifications listed on an F250 vs an F350 ( axles brakes springs are all the same) the only difference is the block height under the rear springs.


04 F250 FX4 CC Lariat SB, Rhino Lining 6.0L V-8 Diesel TorqShift auto Camper Package-Rear Stabilizer Bar,Aux Springs, Rancho RS900X, Timbrems, Goodyear 245/70R19.5G, Pullrite SuperGlide, 2005 CedarCreek Silverback,2003 F350, 2007 Outfitter Apex 9.5


kehale

Arizona 2011

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Posted: 10/15/04 10:13am Link  |  Print  |  Notify Moderator

Quote:

No way that axle is 6084. The 265 tires must be an option and they don't bother to change the printed spec from the standard 245's.


Here's the answer you're looking for.

Your truck is an F250, as such, the rear axle is supposed to be rated for 6,084 lbs with 235/85-16 tires stock (3042 lbs each).

You have upgraded to 265/75-16 tires (a factory option)
This does not change your gross (rear) axle weight rating, as it is based on springs, as well as tires. F350 SRW trucks use "B" code springs. F250's use "A" code springs. If you have the B code springs, then you do (truely) have a 6830 lbs rear axle setup.

The 10.5 SRW rear axle is rated at 9,750 lbs by Visteon, so...you're not over on the actual axle at all.

Hope this clears things up.
-T


06 Lance 1181

Reddog1

El Dorado, CA

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Posted: 10/15/04 11:58am Link  |  Print  |  Notify Moderator

wellsdesigned - I would like to commend you for doing an outstanding job on your post. It is by far the most informative post I have ever seen on this subject. At the risk of sounding like I am trolling, I am glad to see that the uninformed experts have not made any outlandish post on this thread. If there were a way to do it, I would make your thread "mandatory reading" for anyone before they made a wheel or tire post.

Several others have made reliable post relative to tire/wheel size and rear axle capacities. Great post.

To add to the wheel post, I was informed by a friend who was in the wheel business for over 20 years, that side loads measured wheel loads. He learned this from his brother who was a wheel designer for a major wheel manufacture for over 30 years.

I am pleased to hear that someone besides me knows that tire load capacity is not just determined by the load range, but tire size is also a major factor.

People have trouble accepting that manufactures do not change every door sticker and owners manuals just because they make load carrying improvements.

Well stated by wellsdesigned.


Wayne



2004.5 Ram SLT LB 3500 DRW Quad Cab 4x4
1988 Bigfoot (C11.5) TC (1900# w/standard equip. per decal), 130 watts solar, 100 AH AGM, Polar Cub A/C, EU2000i Honda

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jgaylor

Dewey, Arizona

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Posted: 10/15/04 12:39pm Link  |  Print  |  Notify Moderator

Great explanation, that is why i went to 19.5 tires and rims, so I could carry my heavy lance 101 with a saftey margin.


Retired Boeing Computing Professional 6/99 Renton Washington.

Jerry & Roberta, and Bandit.

2006 Pleasureway Plateau (purchased 11/23/2006) Loaded With All options.




wellsdesigned

Above the Sacramento Fog, CA

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Posted: 10/18/04 08:49am Link  |  Print  |  Notify Moderator

People have had a lot of great info to add. If you've come this far reading this post on tires, then this info from a fellow memer who just retired from 49 yrs in the tire business, from service to auto manager will be informative:

"the code for sidewall ratings was started in 1939 with cotton cord. and as any old timer will tell you, most of the tires made that way would hardly make it home...
any tire equal to 4 plys cotton = B
any tire equal to 6 plys cotton = C and etc & etc.....
(that makes the often used E tires on a truck 10 plys)
The code has never been changed.....
most new cars are coming with one ply tires.... most people do not know that either....also the P metric truck tires are a joke, as the rating on them is taken on a perfect smooth surface with its load.... LT rated tires do have a much tougher test to get their ratings...
Notice... the single ply steel SIDEWALL pickup tires are doing a very good job... got to remember 18 wheelers are on 3 ply steel SIDEWALL.. "

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