Rohloff Upper Chain Guide.
- Inner/outer retention plate system keeps chain on
- Forward pedaling replaces a dropped chain instantly
- Mounts in place of front derailleur to seat tube
- Included spacers allow for precise chainline alignment
- Especially useful on full-suspension frames
- Fits 28.6mm, 32.0mm, & 35.0mm seat-tubes (shims for 28.6mm & 32.0mm included)