I need to increase the cargo capacity on my 07 CrewMax buy something like 400 to 500 pounds. I'm towing a HTT with a dry hitch weight of 645# before options, cargo and loaded propane tanks. The four passengers and dog have a combined weight of about 650#, my Equalizer WDH weighs 100 pounds (according to the manufacturer). My best guess is I'm somewhere near 1,500# of cargo capacity, not including fuel and all those other little things that you end up with. That's already 140# over the limit.

I'd like to put bicycles and a few other lightweight items (chairs) into the bed of the truck.

What is the weakest part of my suspension that I need to attack first? It makes no sense to buy Bilstein shocks if the stock shocks have capacity over the springs, bearings, wheels or tires.

I have 35K miles on the truck right now, it's 28 months old.

TIA!