Product families
Series available: RS.
Shared fitment standard
Rear 21089 sprocket fitment standard
Technical reference for vehicles and public LBG SKU candidates sharing thisrear sprocket mounting pattern.
Geometry
21089
Position
rear
Products
3
Applications
5+
Tooth range
Available teeth: 45, 47, 49.
Chain pitch
420.
Fitment notice
This is a technical reference, not a final fitment guarantee.
LBG SKU candidates for this standard
Product options are public Langbiang Gravity SKUs for fitment planning.
| LBG SKU | Series | Teeth | Chain | Material |
|---|---|---|---|---|
| LBG-R-RS-21089-47-MK1 | RS | 47 | 420 | racing_steel |
| LBG-R-RS-21089-45-MK1 | RS | 45 | 420 | racing_steel |
| LBG-R-RS-21089-49-MK1 | RS | 49 | 420 | racing_steel |
Part-number references
These references create deeper search paths into the same fitment standard.
Part-number references pending
No part-number references are mapped to this standard yet.
Vehicle applications using this standard
This list is for research and comparison. Verify exact model-year fitment before production or purchase.
Showing 5 of 5 applications
| Application | Make | Model | Year | Chain pitch | Open |
|---|---|---|---|---|---|
| Honda CR50 1983-1985 | Honda | CR50 | 83-85 | 420 | View fitment |
| Honda CR60 1985-1986 | Honda | CR60 | 85-86 | 420 | View fitment |
| Honda CR60 R 1983-1984 | Honda | CR60 R | 83-84 | 420 | View fitment |
| Honda CR80 RC 1982 | Honda | CR80 RC | 82 | 420 | View fitment |
| Honda CR80 RD,RE 1983-1984 | Honda | CR80 RD,RE | 83-84 | 420 | View fitment |
Research workflow
Start with a part number, then follow the shared fitment standard to understand related applications.
Compare series, tooth counts, and chain pitch before narrowing down a public LBG SKU candidate.
Use the bike fitment page for model-year context before requesting final verification.