Many owners find that choosing a replacement chain feels like a guessing game because of the confusing overlap in Stihl’s bar configurations. I’ve sifted through the specifications and buyer feedback to help you avoid a mismatch. My goal is to save you the headache of returning parts that don’t fit. Let’s look at which replacement chain actually earns its keep, ranked from basic utility to top-tier performance.
| Best For | Product | Name | Score | |
|---|---|---|---|---|
| Best For Reach |  |
18 Inch Chainsaw Chain Fits Stihl MS250, MS251, MS251c, MS 250 251 251c, 26 rm3 68 | 9.8/10 | View On Amazon |
| Best For Precision |  |
STIHL 61PMM355E Oilomatic Picco Micro Mini Comfort 16-Inch Saw Chain, 3/8-Inch Pitch, .043-Inch Gauge, 55 Drive Lengths | 9.3/10 | View On Amazon |
| Best For Heavy-duty |  |
Oregon Chainsaw Chain for 20" Bar, .325" Pitch, .063" Gauge, 81 Drive Links | 8.8/10 | View On Amazon |
| Best For Value |  |
3 pk) 16" Stihl Chainsaw Picco Micro Oilomatic Saw Chain 61PMM355 3/8p .043 55dl | 8.1/10 | View On Amazon |
1. 18 Inch Chainsaw Chain Fits Stihl MS250, MS251, MS251c, MS 250 251 251c, 26 rm3 68
This chain earns its ranking through its superior reach, providing an extra two inches of cutting length compared to standard 16-inch options. It is designed for homeowners who need to tackle larger limbs or logs without upgrading their entire powerhead. I appreciate that it uses German steel, which generally holds an edge longer than softer, budget-friendly alternatives.
However, you must be careful with compatibility. While it fits many MS 251 models, it requires a specific .063-inch gauge bar, which is not universal. I would suggest checking your current bar stamping carefully before clicking buy.
Owners consistently highlight the benefit of the extra reach for clearing medium-sized brush.
Buyers note that the lubrication grooves seem to assist with heat management during longer cuts.
A common technical point is the need to verify your bar gauge matches the .063 requirement exactly.
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2. STIHL 61PMM355E Oilomatic Picco Micro Mini Comfort 16-Inch Saw Chain, 3/8-Inch Pitch, .043-Inch Gauge, 55 Drive Lengths
This chain is best for the meticulous user who prioritizes clean, precise cuts over raw, aggressive clearing speed. It is engineered specifically for the Stihl ecosystem, ensuring that the pitch and gauge align perfectly with the factory design. In my view, this is the safest choice for anyone who wants to ensure their saw runs exactly as the manufacturer intended.
Because it is a genuine Stihl product, you are paying for reliable tolerances that aftermarket options often lack. The main limitation is that it is strictly limited to 16-inch bars, so it won't help you if you are looking to expand your cutting capacity.
Users frequently report that the factory-matched geometry produces the smoothest vibration levels.
The specific .043-inch gauge is praised for its ability to bite into wood with less strain on the motor.
Buyers often recommend this for those who value long-term longevity over initial purchase price.
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3. Oregon Chainsaw Chain for 20" Bar, .325" Pitch, .063" Gauge, 81 Drive Links
An interesting feature here is the Lubri-Tec system, which channels oil directly to the rivets to reduce internal friction. This design choice effectively turns a standard chain into a more robust tool for heavy-duty tasks like processing hardwood or clearing fallen timber. I find that this specific feature makes it a standout choice for property owners who aren't interested in frequent maintenance.
While it excels at tougher work, keep in mind that a 20-inch bar requires more power from your engine to pull through the wood. If your MS 251 is struggling with the current setup, adding a longer bar might put unnecessary strain on your engine.
Many property owners find the micro-chisel geometry easier to sharpen than full-chisel variants.
The automatic oiling system is noted for reducing the frequency of manual adjustments.
Buyers suggest this option for those who already have a 20-inch bar setup and need a reliable workhorse.
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4. 3 pk) 16" Stihl Chainsaw Picco Micro Oilomatic Saw Chain 61PMM355 3/8p .043 55dl
The most common complaint regarding this set is that buyers sometimes overlook the specific bar size requirements, leading to frustration when the chain doesn't seat properly. However, for those with the correct 16-inch setup, this bundle is the clear winner for long-term value. I think it is the smartest move for anyone who cuts regularly, as having spare chains on hand is essential for avoiding downtime.
You are getting the same quality as a single pack, just in a more economical quantity. It is a straightforward purchase if you are certain about your bar specs and just want to keep your saw running through the season.
High volume buyers appreciate the cost savings compared to purchasing individual units.
The consistent quality of the three chains is mentioned as a major benefit for maintenance planning.
A frequent note is to verify the drive link count before ordering to ensure a perfect fit.
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Choosing Between Them
My top pick is the Stihl 61PMM355E because its factory-matched specifications guarantee the smoothest operation for your MS 251. I recommend this specifically for the precision-minded user who values safety and performance above all else. While the Oregon 20-inch chain is excellent for heavy-duty work and the Upfores 18-inch option provides great reach, sticking with the original manufacturer geometry remains the most reliable path for most owners.
Just keep in mind that Stihl saws often ship with varying bar configurations, so you should always check the numbers stamped on your bar before choosing your replacement. Whether you go with the value-packed 3-pack or the high-reach 18-inch chain, verifying your gauge and drive link count is the most important step in the process.
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