I've had my radwagon 4 for about a month and I love it. But the first problem appeared: the kickstand spring broke. I checked on the springs and I see the problem is they are too "weak" for this particular usage. Here is a picture of the spring that broke off (I was unable to find the 2nd spring, assuming it also broke in the same way):
rad003a.jpeg (http://rad003a.jpeg)
As you can see the spring end "stretched" to the point of not hooking, and then popped off while I was riding.
The spring measures 1/2" diameter by 3" long. See pics:
rad100a.jpeg(http://rad100a.jpeg)
rad101a.jpeg(http://rad101a.jpeg)
My thinking is that the 1/2" spring is too weak. I went to the hardware store and purchased a couple of 3/4" x 3" springs, approx $2-3 each. I put them on the kickstand and it appears to work OK. I'm keeping my fingers crossed that these much stronger springs will do the job. Pics: (sorry was unable to get a good angle on these replacement springs)
rad102a.jpeg(http://rad102a.jpeg)
rad104a.jpeg(http://rad104a.jpeg)
Also a suggestion, keep a spare bungee cord with. I was able to continue riding my bike after losing the springs by bungee-ing up the kickstand. See pic:
rad002a.jpeg(http://rad002a.jpeg)
Thanks for sharing. There is a similar thread on the RadWagon 4 springs here: https://www.radowners.com/index.php/topic,510.msg2685.html#msg2685