Rear Derailleur
Rear derailleur anatomy, B-tension, limit screws, indexing, and hanger alignment.
Lesson Details
Skills to cover in the shop
- Rear derailleur adjustment (limits, B-tension, indexing)
- Derailleur wear and service
- Hanger alignment awareness
Supporting videos
Key procedures / notes
- Rear derailleurs push the chain from sprocket to sprocket by adding or releasing cable tension.
- Upper (guide) pulley should sit aligned under the selected cog.
- Set high/low limits, B-screw gap, then fine-tune barrel adjuster for clean indexing.
Skill Checks: 11 Rear Derailleur, Cable & Housing. Diagrams: Rear Derailleur Diagram & Set-Up. STEM: Gear Ratio Lab.
What you’ll do
Follow the procedures in the lesson document. Complete any note guides or worksheets, then perform the hands-on skill check.
Support materials
Recommended reading
Park Tool Big Blue Book (rear derailleur sections following front derailleur).