It's awesome to have a setup that everyone loves. This kid seat from Workcycles is made to work with their amazingly sturdy Fr8 and Gr8 bikes. It just fits. I've got their frame-mounted front rack and the kid seat attaches to that and has special foot rests. The bike is so sturdy that it hardly notices when there's a 40 pound kid, two saddle bags, and a front rack full of supplies for going to the beach. It can handle it all.