Solgaard Design has designed the interlock which is a universal lock system that can hide inside of your bike frame through the seat post. It's universal and can be installed on virtually any bike. So, You don't need to worry about it when you're not nearby. Keep your bike looking sleek and sexy both as you ride it and as you lock it up. Secure your bike with your InterLock to the bike rack by retracting the cable and putting the cable through the frame for best security.