Premium 20-Inch Chainsaw Chain Replacement for STIHL Models: Durable Performance for Precision Cutting

A reliable 20-inch replacement for many STIHL saws

This 20-inch replacement chainsaw chain is designed to fit a range of STIHL models, including 026, 028, 029, MS260, MS261, MS271, MS280, MS290, and MS291. It matches the listed chain specifications of .325 pitch, .063 gauge, and 81 drive links, making it a practical option when your current chain is worn, dull, or damaged.

It is also listed as compatible with STIHL part numbers 26RS 81 and 36390050081. For owners of the models above, that gives you a strong starting point for confirming fit before ordering.

Will this chain fit your saw?

The most important thing to know is that chainsaw fitment is based on the cutting system specs, not just the saw model name. Even within the same saw family, bar setups can vary. To confirm this chain will fit your saw, check these four details:

• Bar length: 20 inches
• Chain pitch: .325
• Chain gauge: .063
• Drive-link count: 81

If all four match your current setup, this chain should be the correct fit.

This chain is listed for STIHL models including:

• 026
• 028
• 029
• MS260
• MS261
• MS271
• MS280
• MS290
• MS291

It is also listed as compatible with these part numbers:

• 26RS 81
• 36390050081

A quick note on model compatibility: the phrase “and more” in the original fitment means there may be additional STIHL applications, but the safest way to confirm is still by matching the bar and chain specs above. If your saw is one of the listed models but currently uses a different bar length, pitch, gauge, or drive-link count, this may not be the right chain for your setup.

Good places to verify your existing chain specs include:

• The markings on the guide bar
• The owner’s manual
• The side of the current chain packaging, if you still have it
• The stamped or printed number on the chain itself, if legible

Replacing the chain

Installing a new chain is straightforward, but always work carefully. A few minutes of safe setup helps prevent poor cutting performance and premature wear.

1. Turn the saw off completely and let it cool. Remove the spark plug wire or follow your normal safety procedure before servicing.
2. Loosen the side cover and remove the old chain from the guide bar and drive sprocket. Wear gloves when handling the chain.
3. Clean the bar groove, side cover area, and sprocket area before fitting the new chain. Built-up sawdust and oil residue can affect chain tension.
4. Install the new 20-inch chain onto the bar and around the sprocket, making sure the cutter direction is correct. The cutting edges on the top of the bar should face forward.
5. Reinstall the side cover and adjust chain tension so the chain sits snugly in the bar groove but can still be pulled around by hand.
6. Fill bar oil if needed, then run the saw briefly and recheck tension. New chains often stretch slightly during initial use.

If the chain feels too tight, too loose, or does not sit properly in the bar groove, stop and recheck the specs. Forcing a mismatched chain can damage the bar, sprocket, or clutch components.

Keeping it sharp

A good chain cuts faster, straighter, and with less strain on the saw. To get the best life from this replacement chain:

• Keep it properly tensioned. A loose chain can derail, while an overly tight chain creates excess heat and wear.
• Make sure bar oil is flowing correctly every time you cut. Poor lubrication is one of the fastest ways to shorten chain life.
• Touch up the cutters regularly instead of waiting until the chain is very dull. A lightly maintained chain is easier to sharpen and performs more consistently.

Also, avoid contact with dirt, rocks, and metal whenever possible. Even a quality chain loses its edge quickly when it hits abrasive material.

FAQ

Will this chain fit every 20-inch STIHL bar?
No. A 20-inch bar alone is not enough to confirm fit. Your setup must also match the .325 pitch, .063 gauge, and 81 drive links listed for this chain.

Is this chain only for professional users?
No. It is suitable for both professional and homeowner use, as long as the saw and bar match the listed specifications and compatibility references.