Otterbox Defender Belt Clip Adapter for 35mm MTB Tube

I've wanted to be able to mount my phone to my Cannondale F9 since I first purchased it and could never find a way to do so without a big clunky attachment, without having to buy a completely different case with its own proprietary mounts, or one that wasn't held together with double sided tape. So I finally got around to designing one that fit my purpose. I use the TrackMyRide+ App alot so this makes it easier to both see calls and handle your phone without having to pull it out of your pockets