It would appear that we have a problem with 2018 MTB Kingston Membership Tags falling off their key ring. If you have mounted this to your seat rail, there is a likely chance that the key ring has warped in the process. Please take a moment, and ensure your tag is securely fixed to the seat of your bike or your pack. If the ring is warped, please replace it with a zip-tie.
Happy Litter-Free Trails!