Lezyne Caddy QR Medium; The Lezyne M Caddy QR is a medium sized, wedge-shaped Caddy is designed to carry just the right amount of tire repair for most rides. The QR mounting system attaches the Caddy to the saddle rails.around the seat post. Durable woven nylon fabrics, a water resistant zipper and reflective tail light loop make this caddy ready for all weather. The main compartment features neoprene pockets for organizing tire repair and money. It also has an easily accessible, external compartment for a medium sized multi-tool.