MetalGator wrote:
This is what I am thinking about purchasing in the future.
2014 Ram 2500 4x2, Laramie CC, shortbox 6.4L Gas, 4.10 Gear
Payload 3490
Towing 15,820
Fifth wheel
KZ Durango D336RE
Dry weight 10,070 (10,400 actual weight as seen at local RV show)
Dry Hitch 1,830
GVWR 12,500
Length 34' 9"
Going by GVWR (20% x 12,500) = 2500 Pin weight
Looks by the numbers that I should be good. What am I missing? I was initially looking at a 1 Ton Ram Gas but I only gain 490lbs payload (3980 vs 3490) and I'd like to get the 2500 due to the coil spring suspension. The truck will be my daily driver.
About the only thing that I would say- is to watch the payload of the truck.
1) Check the actual truck that you're buying. My available payload is slightly lower than the advertised payload for a similarly equiped truck (per the Ram Body Builder) due to the options that we picked for it.
2) Give yourself conservative estimates for occupants, stuff you carry, stuff you'll add to the truck (my super cool bed cover is 100+ pounds), your hitch, etc. It adds up quick (my family of 4, our truck changes, hitch and all weigh about 1,200 pounds).
I think your pin weight estimate is spot on. The dry pin weight percentage is about 18%- that usually goes up a couple of points, so planning for 20% is realistic. With only 2,500 pounds of cargo carrying capacity in the fifth wheel, you're likely going to be near GVWR when all is said and done.
Here's a couple of handy little calculators that may help:
Towing Capabilities Based on Truck's Available PayloadPin Weight Estimator Based on Dry Weights