I have a Master Tow dolly (others may not apply). It has A GVWR & GAWR of 3,500 lbs. It has a 5K hitch coupler and weighs 550 lbs. I can put about 2,950 lbs on the dolly or tow a car up to 4,450 lbs. Front wheel drive cars have about 60% on the front axle. So with a max car weight of 4,450 the load weight on the dolly will be about 2,670 lbs.
Fran, Mary & Zoey (silver Cocker)
2006 Itasca Sunrise 35A, 2005 W-22, Allison 1000 5 speed
'13 Ford Focus ST or '10 Prius on Master Tow Dolly 80THD-SB or '00 Jeep Cherokee 4-down