I was looking for a heavy duty rack for the back of my bike but either I couldn't find one or the one I found was too expensive. So, I decided to make my own out of 1/2" electrical conduit and some wood.
It's surprisingly simple and can hold the weight of a person. Plus, since the top is made of wood, I can screw anything I want to it. I'll keep refining it and maybe offer it for sale to you guys for a modest price.
Email me: Carry.Stuff.On.My.Bike@gmail.com
Step 1: Measure and Cut Conduit
You'll have do some basic measurements here from under you seat to where the tire ends, say 24". The rack should be level with the ground. I cut 2 pieces 24" long and used my bench vice to flatten the ends. I bent them to so they would fit on the bolt that tightens the seat.