18" vs 20" tires for towing on truck

evanrem wrote:
Anybody have any input on towing between 18" and 20" rims? I'm getting a new 2500 Silverado and the ones I have to pick from all have 20" rims. I will be towing about 9k on the bumper and maybe a fiver down the road.
Thanks

LOL...your getting some very bad input about the OEM 20" truck wheels and 20" LT tires.
Goodyear/BFG/Firestone/Michelin/Bridgestone all make a 20" LT E rated tires at 3750 lbs capacity.
Ford/GM and Ram 20" wheels are rated 3500-3600 lbs for the one ton SRW trucks which have a 7000-7050 RAWR. The 20" option is a very popular option for heavy hauling with a HD 250/2500 or the 350/3500 SRW trucks.
Now a 1/2 ton with low capacity 20" P tires and low rated 20" wheels are a whole different story.

Your 2500 GM has a 6200 RAWR which includes tires/wheels and rear suspension and is good for around 3000-3200 lb payload before exceeding the lessor of a tire/wheel or rear spring pack.

I don't know about a GM but the F250 Ford with a heavy service package is the exact package as the 7000 RAWR F350 SRW truck.