Sequoia Driver

Just ordered a 2018 F150 Lariat with Heavy Duty Payload Package. The only wheel available with the 7850 GVW package is the "Silver Aluminum Heavy Duty Payload Package Wheel". This 18 x 7.5 wheel has a rated "Maximum Wheel Capacity" of 2,275 pounds for the rear axle (per 2017 F-150 Specs found in www.esourcebook.dealerconnection.com). The maximum axle capacity (GAWR) rear is 4800 pounds. So are the wheels under-rated by Ford and will carry 2400 pounds, or did Ford do a Boo-Boo?? AND since the Heavy Duty Payload Package now comes with "C" rated tires with 50 psi max pressure, can we be putting "E" rated tires on and run them with 80 psi when pulling a trailer?? BTW, Michelin recommended to me to run the 80 psi when fully loaded (40 psi when not fully loaded...a little light I think)

smd3

The wheels are rated less than the axle, I'm not sure why that's a problem. Both ratings are well under the payload capacity of the truck. I'm sure there's a significant safety margin in both the wheels and the axle.

I ran 40psi in my Tacoma when I wasn't towing anything, it helped the wear. I found that at the higher pressures the center of the tire was wearing faster than the outers.

I'm not sure about running the full 80psi, I can't see why it'd be a problem though.

8100hd

I certainly would expect the wheel rating to at least equal the axle rating. Maybe it’s a misprint?

smokeywren

As smd3 inferred, it doesn't matter if you don't exceed the payload capacity of the F-150. If you load the rear axle to 4,800 pounds, you're going to be overloaded over the payload capacity of the HDPP F-150.


An approximate max loading of 2,275 on each rear tire would mean only 1650 on each front tire without exceeding the GVWR of the HDPP F-150. But more likely when towing a tandem-axle trailer, you could have max weight of about 2,200 on each rear tire and 1,725 on each front tire without exceeding the GVWR of the HDPP F-150.


So don't be concerned with GAWR and worry about GVWR and payload capacity.


I'm not any sort of engineer, but I agree with you that rGARW of 4,800 cannot be supported by rims that have max weight capacity of 2,275. I would be pleased if a PE in chassis engineering could explain this.

8100hd

Well based on the fact that everyone here thinks that the HDPP is the Holy Grail of f150 towing and think they can load the rear axle up to 4800lbs of pin weight, tongue weight, and gear. Yes its a big deal. That means the rear axle rating is really 4550 not 4800. To me it just further suggests that the HDPP is primarily for loading the truck stand alone, and doesn’t transform the truck into a 3/4 like everyone thinks. If true it’s a lawsuit waiting to happen.

Pugga

iTrader: (1)

The wheels and axles are separate items... Axle rating is not impacted by the wheel rating. The axle is rated at whatever it's rated at, if the wheels have a lower carrying capacity, they will be your limiting factor. Every vehicle has a limiting load carrying factor, whether it be axle rating, wheel rating, tires, suspension, etc. If you're going to try to max out a vehicle, it's on the driver/owner to do their homework and make sure all the parts and pieces are all within their limits.

8100hd

No rawr is the rating of the system as a whole including springs, wheels, and tires.

mass-hole

Looking back, it appears the wheels have been rated at 2275 since at least 2016 so, unless they really arnt paying attention, it doesnt seem to be typo. They were even lower in 2015, although i thought they didnt make any HDPP trucks then.

mass-hole

I am pretty sure MagneticScrew posted his weights with that gargantuan 5th wheel he has and was close to or at the 4800 lb RAWR and just under payload. The RAWR is close to the payload on an HDPP screw so you could certainly be over the wheel ratings and not be over payload.

johndeerefarmer

The 7 lug in '14 were rated at 2400 lbs. The '15 max was 2101 lbs. Must be some of Ford's new math..