The short answer
Most residential string trimmers use .065", .080", or .095" line. The right size is the one your trimmer shipped with — check your owner's manual, the old spool, or the markings on the trimmer head. Going thicker cuts tougher weeds but strains the motor; going thinner is safe but wears faster.
Trimmer line sizes by brand
These are the line diameters most models from each brand ship with. Individual models vary, so confirm against your manual or old spool before buying.
| Brand | Common factory line size | Notes |
|---|---|---|
| EGO (Power+) | .095" | Standard across most EGO string trimmers |
| DeWalt (20V / 60V) | .080" | Most 20V Max trimmers ship with .080" |
| Milwaukee (M18) | .080" | Some heavy-duty models take .095" |
| Ryobi | .065" (18V) / .080" (40V) | 18V models typically .065", 40V typically .080" |
| Stihl (battery) | .080"–.095" | Gas models often run .095"–.105" |
| Echo | .080"–.095" | Most residential models ship with .080" |
| Husqvarna | .080"–.095" | Check the head — 130L and similar run .095" |
| Greenworks | .065" (24V) / .080" (40V/60V/80V) | Higher voltage = thicker line |
| Worx | .065" | Standard across WG150-series and similar |
| Black+Decker | .065" | AF-100 spool is the common replacement |
| Craftsman | .065"–.080" | V20 models typically .080" |
| Toro (60V Flex-Force) | .080" | 51831 / 51881 series |
| HART | .065"–.080" | 20V models typically .065" |
| Troy-Bilt | .080"–.095" | Gas models often .095" |
| Hyper Tough (20V) | .065" | HT21 series |
Sizes above reflect common factory configurations gathered from manufacturer documentation. Always verify with your specific model's manual.
Find your replacement spool
If you know your brand, these are the direct-fit replacement spools we stock:
- Black+Decker — AF-100 .065" spool (fits LST300, LST136 and similar)
- Greenworks 80V — SB00L00 .080" spool (fits ST80L00, ST80L210)
- Toro 60V — 88616 .080" spooled line (fits 51831, 51881)
- Worx — WA0007 spool (WG173, WG183) / WA0010 spool (WG170, WG163)
- HART / Ryobi — AC14RL3A spool (HGHST01, HGST02 and compatible Ryobi models)
- Craftsman — CMZST080 spool & cap (CMCST910, CMCST930)
- Hyper Tough 20V — HT21 spool & cap
- Troy-Bilt — replacement spool (TB22, TB25 series)
Don't see your brand? Browse all trimmer spools & line.
How to check your trimmer's line size
- Owner's manual — the specs page lists line diameter.
- Old spool — the diameter is usually printed on the spool itself.
- Trimmer head — many heads have the max line size molded into the plastic.
- Measure it — a digital caliper on a piece of old line gives you the exact diameter. See our trimmer line diameter guide for the full breakdown of .065" vs .080" vs .095".
FAQ
Can I use .095 trimmer line instead of .065?
Only if your trimmer head is rated for it. Most heads list a maximum line diameter — exceeding it can jam the feed mechanism or overload the motor. When in doubt, match what came with the trimmer.
Can I use .095 line instead of .080?
Same rule: check the head's rated range. Many .080" heads accept up to .095", but gas and high-voltage battery trimmers handle the jump better than small 18V/20V models.
Is .080 thicker than .065?
Yes. Line diameters go .065" < .080" < .095" < .105". Thicker line lasts longer and cuts heavier growth, but needs more power to spin.
Should I use .080 or .095?
Use what your trimmer shipped with. If your manual lists a range (e.g., .080"–.095"), choose .080" for light lawn trimming and .095" for thick weeds and brush.
What happens if the line is too thick?
The line may not feed properly, the head can jam, and the motor works harder — which shortens runtime on battery trimmers and can overheat smaller motors.
What size trimmer line for EGO?
Most EGO Power+ string trimmers use .095" line.
What size trimmer line for DeWalt 20V?
Most DeWalt 20V Max trimmers ship with .080" line.
Guide by the Opuladuo Parts Team. We sell replacement trimmer spools, heads, and line for major brands. Sizes listed are common factory configurations — always confirm with your model's manual.
Vérifiez votre numéro de modèle avant de commanderChaque fiche produit indique les marques et numéros de modèle compatibles. Un doute? Écrivez-nous.
