§ Fitment Guide
Stihl S-10 chain size & replacement chart
The Stihl S-10 takes a .404" pitch, .063" gauge chain. Below: every factory bar length with its exact drive-link count, cross-referenced to Oregon part numbers, plus the OEM parts list.
Fitment matrix
| Bar length | Pitch | Gauge | Drive links | Oregon chains | Bars / combos |
|---|---|---|---|---|---|
| 21" | .404" | .063" | — | — | 213RNFE031 |
| 25" | .404" | .063" | — | — | 253RNFE031 |
Source: Oregon part-finder, retrieved 2026-07-06. Part numbers link to the manufacturer's spec page. Always confirm drive-link count against your current chain before ordering.
Compatible chains in our shop
How to confirm the fit
- Read your bar. The pitch and gauge are stamped on the guide bar near the saw body — e.g.
3/8" LP .050". - Count drive links. Lay the old chain flat and count the teeth that ride inside the bar groove. This number must match exactly; length in inches is not enough.
- Match all three. Pitch, gauge and drive-link count all have to agree with a row in the table above. Two of three is not a fit.
Watch: how to identify chain pitch and gauge
Oregon Products: Identifying Chain Pitch and Chain Gauge Official video from Oregon Products, the manufacturer behind the cross-reference part numbers above.
Official Stihl resources
- STIHL owner's manuals — owner's manual for the S-10, including tensioning and maintenance intervals.
FAQ
What size chain does a Stihl S-10 take?
The Stihl S-10 runs a .404" pitch, .063" gauge chain. Available bar lengths: 21", 25". Match the drive-link count to your bar (see the table above).
How do I know which gauge my S-10 chain is?
Check the number stamped on your guide bar near the tail, or measure the drive-link thickness with calipers. Common gauges for the S-10 are .063".
Can I put a longer bar on my Stihl S-10?
Oregon lists 21", 25" bars for the S-10. Stay within this range — a longer bar than the engine is rated for cuts slowly and accelerates wear.