This is the first generation of fold retainer designed specifically to help Brompton users carry and walk their Brompton in the folded mode. Because tire width and frame tolerance vary from bike to bike, be sure to choose the right hook length to make this retainer work best for you. **Please measure the circumference as shown in the photo**
How it works: https://youtu.be/H3IycaAeQAw
Features and installation guide: https://youtu.be/pxBNehrxcP0
With fold retainer, you can travel with Brompton with ease: https://youtu.be/ZmksgvCBlsE
NOTE: **To choose the right hook length, please measure the circumference as shown in the photo**
