remove 27.2mm post, press fit fender holder on and secure with 5mm bolts, just tap your own thread with bolt into the plastic. insert soda bottle, and go for a ride in the rain...Angled to suit my 29er...Load a cut in half coke / soda bottle into the rear thread...second pic shows the thread. Still might have to spin the thread around so bottle finishes facing down...I will test print and fix when I have time..remove 27.2mm post, press fit fender holder on and secure with 5mm bolts, just tap your own thread with bolt into the plastic. insert soda bottle, and go for a ride in the rain...