op wrote:
So would I be limited by my rear axle rating of 6100 lbs even though my tires are rated at 7500 lbs (3750 X 2)? If so, I would be still very limited on what 5th wheel I could pull. When I weighed my truck with just me and a full tank of diesel it showed 3260 on the rear axle. That leaves under 2800 lbs available for passengers,hitch,and pin weight. That rules out even a lot of the HT towable 5th wheels.
RAWR is the lessor of the 1.axle....2.tire.....3.wheel ..... 4. rear spring pack.
1. Fords Sterling axle itself carries around 9800 lbs capacity so the axle rear axle assy isn't a issue unless you exceed it.
2. Fords 20" 2016 tire selection shows a 3750 lb capacity.
3. Fords 18" and 20" wheels show a
3750 lb capacity3590 lb capacity.
4. Rear spring pack from Ford;
if your F250 has the camper package or heavy service package its the same upgraded suspension as the F350 SRW truck at 7000 RAWR.
Many folks add rear air bags/Supersprings/Timbrens or add a leaf in the main spring pack to their F250 as its the same truck as the F350 SRW according to Ford Fleet service spec website.