KOM Cycling Edge Universal Phone Adapter Attach Your Smartphone to Any Bike Mount - Quarter Turn Phone Mount Adhesive Adapter

cheaper than quad lock options but need to be stuck to a case not the phone. been using for a few weeks now and its survived glentress, fortwiliam and the golfie. never fell off nor has the adhesive moved. was doubtful at first but win an Amazon sold product that is great quality for its purpose. used on iPhone7 plus

This is a good quality product, made of durable material and has a large contact patch. It locks securely and positively on a standard Garmin mount. The adhesive worked great for the type of case I used (see photo) and after 40+ days and 30+ uses, it has't shown any sign of weakening. My original intention was to use an epoxy glue but it is not needed in the end.

Just be aware that the instructions state it can't be stuck to a rubber or silicon case using the included 3M VHB tape, and apparently 50% of the ultimate strength will be achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours. Something I didn't know about until it arrived so have dropped a star. I've attached it to an iPhone 8 mini battery case which is non-flexible it does have rubber feeling coating - it seems OK but I will leave it the full 72 hours - and when used I will use a leash with the phone

This is the third pair of these I've bought, once they are on a phone case they are not coming off (edit, they will come off, but after 15 minutes with a very sharp knife) Bought to fit new phone cases, still haven't found a more sturdy option for a non iPhone/main brand phones.

After a while using this item, when riding over a rough road on my carbon road bike with this securing my large-screen Galaxy S9+ mobile phone, the tab came loose from my mobile phone case & the phone tumbled onto the road (fortunately causing no more than damage to the 'armour glass' screen saver). The 3M sticky backing was still very sticky, so I stuck it back on my phone's case, further securing it all around the edges with UV resin. Ever since adding the UV resin, my phone has stayed secure.

Wouldn't stick at all, so I left it overnight with a weight on it... still nothing. I assume it only works on certainly materials, but you'd hope that a normal phone case would be one of them.

I bought this to replace a similar phone mount by Spigen. The idea is the same: 3M sticker for the back of my phone (OnePlus Nord, so I had to buy a cheap but decent case too) and you can click the phone by rotating it into the stem mount. Depending on your bike handle you may have to fiddle around a bit how to place it but it does the job.

It connects things to your Garmin mount and feels like it's better quality than 3d printed ones.