Originally Posted by ActionJackson
You can buy a double female receiver that you can hitch a receiver mounted bike rack AND use a receiver for the tow dolly. They have them at CW.
We use a double receiver with a ball and the female on top. However, with the bulk of the Kar Kaddy surge brakes, there is not enough clearance between the two levels on either the double female or the ball/female units on the market. I tried both.
I finally had a local welder cut off the top and put a longer riser on it to get the needed clearance. If I were to do it again, I would have had him fabricate the whole unit from scratch.