The description of the product states "Only Compatible with State Bicycle Co. City Bike models", however it is an option when buying the $300 Core-Line.
I am happy to state that it fits perfectly on my 60cm Beorn. I installed it loosely at first, so the kickstand has a LOT of grooves from where the spokes hit it repeatedly. I tightened it and now it's stable as can be. I'm happy with this product and it allows me to lock my bike in most positions standing.