It's not clear--to me--how they derive the brochure weight specifications of each model. I can say that the 3670RL pin weight is advertised at a little less than 2000# and my actual pin weight is about 2500# with very little in the garage (couple of water hoses, 2 chairs, golf clubs) or bedroom closet (some summer clothes, under garments/socks, etc). I do have the bedroom air conditioner and added a 3 inch mattress pad. This weight includes 2 LP tanks, mostly full, and 2 batteries, small bbq grill and 2.5 gallon LP tank located in the front compartment. I can see where it would be real easy to run the pin weight up to 2800#-3000#. Hope this helps.