I am a big fan of the Ortlieb Quick Rack but on my first ride my bag fell off the back of the bike. The rack had a 15 lb trunk bag load and the rack slipped off the seat post rod backwards. I had tightened the bolts VERY tight. I had used a level to install the rack perfectly at zero. This was not user error.
The smooth plastic clamp is on a smooth aluminum rod with little friction, so this is not a very robust design to prevent slippage.
I purchased a simple hitch pin from a hardware store (see photos) 5/64in x 1-5/16 hitch pin. This pin is 2mm thick. The rod is 8mm thick. I drilled a 2.2mm hole in the rod and snapped the hitch pin in place. Guaranteed the rack will not slip now. Just sharing for anyone with same problem.
by Admirable-Passion-22
3 Comments
Hmm. Very weird, my rod is holding up very strong. (🤨)
In the second picture, it looks like there is a crack along the length of the clamp. This could be a result of over tightening. This is where a 3d printer comes in handy.
You should call ortlieb. They are very good at replacing things that break and wear out. I bet they help you.