While technically possible in an emergency, using monofilament as fly line backing is generally not recommended for optimal performance and durability. Dedicated fly line backing, typically made from Dacron, offers superior characteristics crucial for fly fishing.
Why Monofilament Isn't Ideal for Fly Line Backing
Using monofilament for your fly reel's backing can lead to several practical issues that diminish your fly fishing experience and the longevity of your setup.
Memory and Strength Degradation
One of the primary concerns with monofilament is its tendency to develop "memory." When monofilament stays on a reel spool for an extended period, especially under tension, it will develop coils. This "memory" not only makes the line harder to manage but can also compromise its original breaking strength, making it less reliable when you need it most during a long fight with a strong fish.
Diameter Inconsistency
Monofilament lines often have a different diameter compared to standard fly line backing. This inconsistency can lead to improper spooling on your fly reel, potentially causing uneven line lay or capacity issues. Fly line backing is specifically designed with a consistent, optimal diameter for fly reels.
Stretch and Feel
Monofilament has a notable amount of stretch. While some stretch can be beneficial in certain fishing scenarios, excessive stretch in backing reduces sensitivity. When a fish runs into your backing, you want a direct connection to feel its movements and maintain control. High stretch can dampen this feel, making it harder to fight a fish effectively.
Knot Reliability
Connecting your fly line to your backing, and your backing to the reel arbor, requires strong, reliable knots. Monofilament can be more prone to slipping or requiring specialized knots that are harder to tie securely compared to the robust, consistent knots achievable with Dacron backing.
The Superior Choice: Dacron Fly Line Backing
For these reasons, Dacron backing is the industry standard and recommended choice for fly reels. The slight extra cost for purpose-built Dacron backing is a worthwhile investment for its reliability and performance.
Key Benefits of Dacron Backing:
- Minimal Memory: Dacron holds its shape well on the spool and does not develop the coil memory that monofilament does, ensuring consistent performance.
- Low Stretch: Provides a more direct and sensitive connection to the fish, enhancing your ability to feel subtle takes and control the fight.
- Consistent Diameter: Designed for fly reels, ensuring even line lay and maximizing spool capacity.
- High Knot Strength: Forms secure, reliable knots that won't slip, crucial for landing big fish.
- Durability: Highly resistant to abrasion and degradation, offering long-lasting performance.
Monofilament vs. Dacron Backing: A Comparison
| Feature | Monofilament as Backing | Dacron Backing (Recommended) |
|---|---|---|
| Memory | Develops coils ("memory") over time, reducing reliability. | Excellent shape retention, minimal memory. |
| Diameter | Often inconsistent; not optimized for fly reels. | Consistent and optimized for fly reel spooling. |
| Stretch | Moderate to high, reducing sensitivity and control. | Low stretch, offering direct feel and control. |
| Knot Strength | Can be prone to slipping; requires specific, careful knots. | Excellent knot strength and reliability. |
| Abrasion | Can be susceptible to nicks and wear over time. | Highly durable and resistant to abrasion. |
| Cost | Potentially lower initial cost, but can be a false economy. | Slightly higher cost, but a purpose-built, long-term solution. |
For more information on fly line components, consider researching reputable sources on fly line backing materials and fly fishing line types.
