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Berkley Trilene Big Game Monofilament
Berkley Trilene Big Game Monofilament
Diameter chart, reel capacity & backing guide
Trilene Big Game is Berkley's heavy-duty nylon mono for anglers who want stretch, substantial line strength, and a large supply for respooling. Its diameter matters as much as its pound-test label: the selected size can be used as a working main line or as backing beneath another line.
- Construction
- Nylon monofilament
- Listed strengths
- 10-50 lb
- Line type
- Monofilament main line
Is Trilene Big Game right for your setup?
Big Game is worth considering for bait fishing, larger freshwater fish, and saltwater applications where nylon's stretch is useful. It also serves as economical backing. On smaller spinning reels, compare the actual diameter before choosing a heavy strength; a line can physically fit but still be awkward to cast.
Berkley Trilene Big Game diameter chart
These entries match official US package listings to the same product codes in Berkley's diameter data. Only resolved strengths and package sizes are shown; the conflicting 25 lb listing is omitted.
| Strength | Inches | mm | Spools (yd) |
|---|---|---|---|
| 10 lb | 0.012 | 0.3048 | 1500 |
| 12 lb | 0.014 | 0.3556 | 1175 |
| 15 lb | 0.015 | 0.381 | 900 |
| 20 lb | 0.018 | 0.4572 | 650 |
| 30 lb | 0.022 | 0.5588 | 440 |
| 40 lb | 0.024 | 0.6096 | 370 |
| 50 lb | 0.028 | 0.7112 | 275 |
Choosing your Trilene Big Game strength
The 10 and 12 lb choices are the lighter entries in this chart. Check their diameters against the reel and lure you intend to use instead of assuming they handle like every other brand with the same strength label.
The 15 and 20 lb choices use more spool space and suit setups that can manage thicker nylon. A larger spool, heavier presentation, or bait-fishing application can make more sense than a small finesse spinning reel.
The 30-50 lb entries are substantial main lines. Choose them for a specific heavy-duty setup, not as a default upgrade for ordinary bass fishing. When Big Game is only backing, its diameter determines the length needed beneath your working line.
This is a specification-based setup guide, not a hands-on Trilene Big Game performance test.
Want a guided recommendation?
Continue in the Setup WizardBacking, working line & leaders
Big Game as the main line
For a full nylon spool, select your strength and use full-spool capacity. The large retail spool is a supply of line, not an instruction to put all of it on the reel.
Big Game as backing
This page calculates Big Game as the selected working line. To put Big Game underneath braid instead, open the braid's guide or the main calculator and select Big Game in the backing field.
Allow for stretch
Nylon's stretch changes how a rig feels compared with braid. Set the drag for the complete rod, line, and terminal setup; filling the reel does not establish a safe fighting drag.
Trilene Big Game questions, answered
Yes. Use the Big Game strength and diameter as the backing inputs, with your braid selected as the working main line. This page's calculator instead treats the selected Big Game as the main line.
Will a 1,500-yard spool fit on my reel?Usually it is a supply for several fills, not a single fill. The calculator estimates what your selected reel holds at the chosen diameter; stop at the reel's specified fill level.
Why is the 25 lb size absent from this chart?The available manufacturer diameter listing conflicts with neighboring strengths. That entry is withheld rather than used for a capacity calculation. This does not mean the product is unavailable.
Specifications & sources
Specifications checked 2026-09-13. Only source-supported strength and package combinations are included. Official inch values are used for calculations. Check your own label when using older or imported stock. The product image identifies the model, not every selectable strength.
Calculations use the catalog's listed inch diameters. Published inch and millimeter values may differ slightly because of rounding.
- Official Berkley Trilene Big Game product specifications Manufacturer product identity, package options, or exact-SKU diameter evidence.
- Official Berkley Trilene Big Game bulk-spool specifications Manufacturer product identity, package options, or exact-SKU diameter evidence.
- Official Berkley Trilene Big Game diameter records Manufacturer product identity, package options, or exact-SKU diameter evidence.
Berkley Trilene Big Game Monofilament
Diameter chart, reel capacity & backing guide
Trilene Big Game is Berkley's heavy-duty nylon mono for anglers who want stretch, substantial line strength, and a large supply for respooling. Its diameter matters as much as its pound-test label: the selected size can be used as a working main line or as backing beneath another line.
- Construction
- Nylon monofilament
- Listed strengths
- 10-50 lb
- Line type
- Monofilament main line
Is Trilene Big Game right for your setup?
Big Game is worth considering for bait fishing, larger freshwater fish, and saltwater applications where nylon's stretch is useful. It also serves as economical backing. On smaller spinning reels, compare the actual diameter before choosing a heavy strength; a line can physically fit but still be awkward to cast.
Berkley Trilene Big Game diameter chart
These entries match official US package listings to the same product codes in Berkley's diameter data. Only resolved strengths and package sizes are shown; the conflicting 25 lb listing is omitted.
| Strength | Inches | mm | Spools (yd) |
|---|---|---|---|
| 10 lb | 0.012 | 0.3048 | 1500 |
| 12 lb | 0.014 | 0.3556 | 1175 |
| 15 lb | 0.015 | 0.381 | 900 |
| 20 lb | 0.018 | 0.4572 | 650 |
| 30 lb | 0.022 | 0.5588 | 440 |
| 40 lb | 0.024 | 0.6096 | 370 |
| 50 lb | 0.028 | 0.7112 | 275 |
Choosing your Trilene Big Game strength
The 10 and 12 lb choices are the lighter entries in this chart. Check their diameters against the reel and lure you intend to use instead of assuming they handle like every other brand with the same strength label.
The 15 and 20 lb choices use more spool space and suit setups that can manage thicker nylon. A larger spool, heavier presentation, or bait-fishing application can make more sense than a small finesse spinning reel.
The 30-50 lb entries are substantial main lines. Choose them for a specific heavy-duty setup, not as a default upgrade for ordinary bass fishing. When Big Game is only backing, its diameter determines the length needed beneath your working line.
This is a specification-based setup guide, not a hands-on Trilene Big Game performance test.
Want a guided recommendation?
Continue in the Setup WizardBacking, working line & leaders
Big Game as the main line
For a full nylon spool, select your strength and use full-spool capacity. The large retail spool is a supply of line, not an instruction to put all of it on the reel.
Big Game as backing
This page calculates Big Game as the selected working line. To put Big Game underneath braid instead, open the braid's guide or the main calculator and select Big Game in the backing field.
Allow for stretch
Nylon's stretch changes how a rig feels compared with braid. Set the drag for the complete rod, line, and terminal setup; filling the reel does not establish a safe fighting drag.
Trilene Big Game questions, answered
Yes. Use the Big Game strength and diameter as the backing inputs, with your braid selected as the working main line. This page's calculator instead treats the selected Big Game as the main line.
Will a 1,500-yard spool fit on my reel?Usually it is a supply for several fills, not a single fill. The calculator estimates what your selected reel holds at the chosen diameter; stop at the reel's specified fill level.
Why is the 25 lb size absent from this chart?The available manufacturer diameter listing conflicts with neighboring strengths. That entry is withheld rather than used for a capacity calculation. This does not mean the product is unavailable.
Specifications & sources
Specifications checked 2026-09-13. Only source-supported strength and package combinations are included. Official inch values are used for calculations. Check your own label when using older or imported stock. The product image identifies the model, not every selectable strength.
Calculations use the catalog's listed inch diameters. Published inch and millimeter values may differ slightly because of rounding.
- Official Berkley Trilene Big Game product specifications Manufacturer product identity, package options, or exact-SKU diameter evidence.
- Official Berkley Trilene Big Game bulk-spool specifications Manufacturer product identity, package options, or exact-SKU diameter evidence.
- Official Berkley Trilene Big Game diameter records Manufacturer product identity, package options, or exact-SKU diameter evidence.