I picked up 4 bikes today...that's a bit too much for this trailer so ended up making 2 trips. All I can think is how much weight is on that little Free Spirit rear bearing. I'm 240lbs, my kiddo is 25, throw in all steel bike, and of course an extended hitch trailer with wheels that are biased to the rear so a lot of trailer weight is also on the rear wheel. Anywho, got a sweet 3 speed Free Spirit out of it, makes it all totally worth it.