Recommended high load range 18" tires
Thread Starter
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Mountain Pass
Joined: Jan 2020
Posts: 189
Likes: 73
From: Temecula, Ca.
Recommended high load range 18" tires
Just received my 2020 F350 SC SRW. The tires are standard load range E, rated at 3415 pounds, I would like to be above 3700 pound. I carry an AF 865 camper. Any info would be appreciated. Thanks, Pat
Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
Pat,
3415 lbs. suggests your factory tires are size LT275/65R18E (single tire load index 123).
The next factory standard size up is LT275/70R18E (125), which is rated for 3640 lbs. @ 80 psi. An all-terrain version of this tire size should have been an option for your 4x4 truck.
A popular “upgrade” is the LT285/70R18E (127), which is rated for 3860 lbs. at 80 psi. This tire is about the same size (diameter and refs/mile) as the factory option LT275/65R20E (126).
Either way, you may want to look into correcting the speedo and odo if going to larger tires.
Note that the rear springs for the 2020 F350 SRW with 18” wheels are rated for 7230 lbs. (per pair), and the wheels are rated for 3590 lbs. each.
HTH,
Jim / crewzer
P.S. “Zzyzx”, as in the town in the Mojave Desert near I-15?
3415 lbs. suggests your factory tires are size LT275/65R18E (single tire load index 123).
The next factory standard size up is LT275/70R18E (125), which is rated for 3640 lbs. @ 80 psi. An all-terrain version of this tire size should have been an option for your 4x4 truck.
A popular “upgrade” is the LT285/70R18E (127), which is rated for 3860 lbs. at 80 psi. This tire is about the same size (diameter and refs/mile) as the factory option LT275/65R20E (126).
Either way, you may want to look into correcting the speedo and odo if going to larger tires.
Note that the rear springs for the 2020 F350 SRW with 18” wheels are rated for 7230 lbs. (per pair), and the wheels are rated for 3590 lbs. each.
HTH,
Jim / crewzer
P.S. “Zzyzx”, as in the town in the Mojave Desert near I-15?
Thread Starter
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Mountain Pass
Joined: Jan 2020
Posts: 189
Likes: 73
From: Temecula, Ca.
Yes Jim, it is. Long story but I spend alot of time out there off the Zzyzx exit on the I15. Thanks for the response.
I have an AF865 and am going from a 2000 Dodge 2500 to a 2020 F350 SRW, 11,300 GVWR. I will be overloaded on the rear axle, haven't scaled it yet, but once the tires are addressed, I will be comfortable. The Cooper Discoverer AT3's in 295/70R/18 are rated at 4080#, so that may be an option.
I have an AF865 and am going from a 2000 Dodge 2500 to a 2020 F350 SRW, 11,300 GVWR. I will be overloaded on the rear axle, haven't scaled it yet, but once the tires are addressed, I will be comfortable. The Cooper Discoverer AT3's in 295/70R/18 are rated at 4080#, so that may be an option.
Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
Our Lance 855s camper is also not light. I removed a bunch of stuff from the camper and truck (generator, one propane tank, drop-down bunk, thick bed mat, tailgate, rear seat storage box, etc.) to shed weight.
Ready to travel but with more-or-less empty FW-, gray-, and black tanks, we scale at 11040 lbs., 440 lbs. over our official 10,600 lbs. GVWR.
The factory LT275/65R18E tires on our F350 are the largest available on a 4x2, and they were our weak link. I installed Michelin Agilis CrossClimate LT275/70R18E tires to unofficially increase GVWR to 11K lbs., and installed separate-channel air springs to help the rear suspension, and to also restore headlight aim.
So far, so good.
We lived in LA from 79 to 93, and we house- and power-boated frequently on Lake Mead (back when it was full...). The Zzyzx Rd exit was a landmark on our route. I still miss the desert.
Safe travels!
Jim / crewzer
Ready to travel but with more-or-less empty FW-, gray-, and black tanks, we scale at 11040 lbs., 440 lbs. over our official 10,600 lbs. GVWR.
The factory LT275/65R18E tires on our F350 are the largest available on a 4x2, and they were our weak link. I installed Michelin Agilis CrossClimate LT275/70R18E tires to unofficially increase GVWR to 11K lbs., and installed separate-channel air springs to help the rear suspension, and to also restore headlight aim.
So far, so good.
We lived in LA from 79 to 93, and we house- and power-boated frequently on Lake Mead (back when it was full...). The Zzyzx Rd exit was a landmark on our route. I still miss the desert.
Safe travels!
Jim / crewzer
Mountain Pass
Joined: Feb 2010
Posts: 217
Likes: 0
From: Washington State
Im slightly over weight for my Rear Axle Rating and went with Cooper 295/70/18 4085lbs and upgraded with Method Wheels rated at 4500 lbs. Very expensive upgrade but comfort knowing the change exceeds the OEM Tire and Wheel Capacity.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,320
Likes: 13
From: Mid Atlantic
I have these Toyo’s on my truck..
https://www.tirerack.com/tires/tires...omCompare1=yes
4080# load rating. Love ‘em!
https://www.tirerack.com/tires/tires...omCompare1=yes
4080# load rating. Love ‘em!
More Turbo
Joined: Jan 2020
Posts: 605
Likes: 61
Does anyone know the actual axle load rating for the 2020 F350 SRW?
(Not the tire/wheel capacity...)
Thx.
(Not the tire/wheel capacity...)
Thx.
Trending Topics
Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
I’ve seen several online citations that spec the Visteon/ Sterling 10.5 axle at 9750 lbs.
I’ve not seen any load specs for the Dana M275. With a 10.8” ring gear, it appears to be placed between the Dana 70 and Dana 80.
HTH,
Jim / crewzer
I’ve not seen any load specs for the Dana M275. With a 10.8” ring gear, it appears to be placed between the Dana 70 and Dana 80.
HTH,
Jim / crewzer
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More Turbo
Joined: Jan 2020
Posts: 605
Likes: 61
Thanks. Similar to the AAM used by GM and Ram. Makes sense...
Laughing Gas
Joined: Mar 2016
Posts: 1,033
Likes: 105
From: Casper, Wyoming
Below are the axle ratings on my 2017 Ford F350 along with the current tires I am running. I carry a 2017 Northern Lite 8.11 SE on my truck and am very happy with the tires and am within the weight limits of my tires, axles, payload based on CATScale weigh tickets when camper is fully wet and loaded.
Front GAWR – 5200 lbs
Rear GAWR – 7230 lbs
275/70R18E – Cooper Discoverer ST Maax - 3640 lbs @ 80 psi max per tire (7280 total)
Front GAWR – 5200 lbs
Rear GAWR – 7230 lbs
275/70R18E – Cooper Discoverer ST Maax - 3640 lbs @ 80 psi max per tire (7280 total)
More Turbo
Joined: Jan 2020
Posts: 605
Likes: 61
Below are the axle ratings on my 2017 Ford F350 along with the current tires I am running. I carry a 2017 Northern Lite 8.11 SE on my truck and am very happy with the tires and am within the weight limits of my tires, axles, payload based on CATScale weigh tickets when camper is fully wet and loaded.
Front GAWR – 5200 lbs
Rear GAWR – 7230 lbs
275/70R18E – Cooper Discoverer ST Maax - 3640 lbs @ 80 psi max per tire (7280 total)
Front GAWR – 5200 lbs
Rear GAWR – 7230 lbs
275/70R18E – Cooper Discoverer ST Maax - 3640 lbs @ 80 psi max per tire (7280 total)
Bill
Laughing Gas
Joined: Mar 2016
Posts: 1,033
Likes: 105
From: Casper, Wyoming
Here you go -
Truck Stats:
2017 Ford F350, CCSB, 4x4, SRW, 6.2 gas, 3.73 rear end
Payload – 4226 lbs
GVWR - 11,300 lbs
Front GAWR – 5200 lbs
Rear GAWR – 7230 lbs
275/70R18E – Cooper Discoverer ST Maax - 3640 lbs @ 80 psi max per tire (7280 total)
Truck weight empty without camper at CATScale:
Steer axle - 4320 lbs
Drive axle - 3160 lbs
Gross Wt - 7480 lbs
Note – full tank of gas, no tailgate and 2 adult passengers
Truck weight with 2017 Northern Lite 8.11 SE at CATScale:
Steer axle - 4040 lbs
Drive axle - 6960 lbs
Gross Wt - 11,000 lbs
Note – full tank of gas, no tailgate, 2 adult passengers and NL 8.11 fully wet
One interesting note - notice how after I put my camper on the truck, it took 280 lbs off the front axle? I noticed that with my camper, my COG was just a hair behind the center of the rear axle. The bump stops on the front of the camper are pretty long so did cut a little over an inch off the bumpers so my camper's COG is now at center of the rear axle if not a little forward. I have not weighed it again since doing that so I don't know how much weight may have shifted back to the front. I plan on weighing it again next month when I get it out of the pole barn after a long, cold, windy and snowy winter up here.
Truck Stats:
2017 Ford F350, CCSB, 4x4, SRW, 6.2 gas, 3.73 rear end
Payload – 4226 lbs
GVWR - 11,300 lbs
Front GAWR – 5200 lbs
Rear GAWR – 7230 lbs
275/70R18E – Cooper Discoverer ST Maax - 3640 lbs @ 80 psi max per tire (7280 total)
Truck weight empty without camper at CATScale:
Steer axle - 4320 lbs
Drive axle - 3160 lbs
Gross Wt - 7480 lbs
Note – full tank of gas, no tailgate and 2 adult passengers
Truck weight with 2017 Northern Lite 8.11 SE at CATScale:
Steer axle - 4040 lbs
Drive axle - 6960 lbs
Gross Wt - 11,000 lbs
Note – full tank of gas, no tailgate, 2 adult passengers and NL 8.11 fully wet
One interesting note - notice how after I put my camper on the truck, it took 280 lbs off the front axle? I noticed that with my camper, my COG was just a hair behind the center of the rear axle. The bump stops on the front of the camper are pretty long so did cut a little over an inch off the bumpers so my camper's COG is now at center of the rear axle if not a little forward. I have not weighed it again since doing that so I don't know how much weight may have shifted back to the front. I plan on weighing it again next month when I get it out of the pole barn after a long, cold, windy and snowy winter up here.
More Turbo
Joined: Jan 2020
Posts: 605
Likes: 61
Thx Wyo,
That NL is about 500# lighter on rear axle than our Eagle Cap-yikes!
I had 3” stops on front of of camper also, I removed those so I could push as far forward as possible. Our EC takes ~50# off front. But I put bike rack in front which fixes that.
I would suggest removing those stops and see what happens. Full h20 might help put some weight in front also.
Thx again,
Bill
That NL is about 500# lighter on rear axle than our Eagle Cap-yikes!
I had 3” stops on front of of camper also, I removed those so I could push as far forward as possible. Our EC takes ~50# off front. But I put bike rack in front which fixes that.
I would suggest removing those stops and see what happens. Full h20 might help put some weight in front also.
Thx again,
Bill