These are mud guards for the Zuca Compact Disc Golf Cart.
The author remixed this model.
I gave the originals a test drive and made some changes.
The fender frame is thicker for more strength. I opted not to add the flare because it seems unnecessary. When you fill the cart pockets, they'll rub on the wheels which can put a hole in them and transfer mud to them. The fender flare seems like it would just hold mud, and I don't find mud flying off the tires.
I have two different mount sizes, one 3mm and one 4mm. The 4mm one goes by the back of the cart frame. I'm not sure why it fit better, but the 4mm on the front part of the frame seemed to bend the fender frame.