Scientific
Scientific Absolute Euro Nymph Leader Fly Leader
$14.85100+ bought last month
View on Amazon
Scientific 135191 Fly Leader Review
Our verdict
The Scientific 135191 Fly Leader sells for $8.40 and holds a 4.4 star average across 102 reviews, the lowest rating in this comparison set. Its bought-last-month figure of 200+ is the highest here, though, showing this copolymer 5X spool sells briskly despite ranking below rivals like the Trout 87481 at 4.7 stars.
Check price on AmazonBest for
Anglers who want a full 5X copolymer spool rather than a short pre-cut leader, and who prioritize price and proven sales volume, at 200+ bought last month, over squeezing out the last tenth of a star in ratings.
Skip if
Skip it if rating matters more than price to you, since the 4.4 star average across 102 reviews is the lowest in this set, and the Trout 87481 offers a higher 4.7 stars across 711 reviews for a similar $7.32 price.
- Material Copolymer
- Weight 0.1 Ounces
- Length 1181.1 Inches
- Line Weight 2.5
- Technique Copolymer
- Size 5X
- Priced 34% below the category median ($12.77 across 22 tracked models)
Our scorecard
4.3/5
overall
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Owner rating4.4/5
4.4 average across 102 owner ratings
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Popularity1.1/5
102 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other fishing gear and tackle we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
A 5X leader spool is a workhorse item for trout anglers who tie their own tapered leaders or replace tippet sections often, and the Scientific 135191 Fly Leader fills that role at $8.40 for a single spool listed at 1181.1 inches, which works out to roughly 98 feet, or close to 30 meters, of copolymer line built to a 5X diameter for fine tippet work.
That length lands right in the neighborhood of the SF FL0102B-5X's 30 meter spool, though the two differ in construction, copolymer here versus the fluorocarbon-tagged blend on that competitor. Line Weight is listed at 2.5, a lighter class figure consistent with a fine 5X diameter meant for smaller flies rather than heavy leader butts.
At 4.4 stars across 102 reviews, this is the lowest average rating of the leaders compared here, trailing the 4.7 to 4.8 range from the Trout 87481 and Maxima MLC20. What it has going for it is volume, a bought-last-month figure of 200+ is the highest in this group, meaning more buyers are choosing it right now than any of the pricier or higher-rated alternatives.
Pros
- 200+ bought last month, the highest purchase volume of any leader in this comparison
- Full spool listed at 1181.1 inches, roughly 98 feet, more material than short pre-tied leaders
- $8.40 price undercuts the $9.99 SF FL0102B-5X and the $24.35 TroutHunter tippet
- 5X diameter suited to fine tippet and small fly presentations
- Copolymer construction, a common middle ground between stiff monofilament and soft fluorocarbon
- Currently InStock and ready to ship
Cons
- 4.4 star average is the lowest rating among the leaders compared here
- 102 reviews is a smaller sample than the 529 to 711 range posted by top competitors
- Line Weight listed simply as 2.5 with no breaking-strength figure given
- Single 5X size only, no other tippet diameters in this listing
Specifications
| Material | Copolymer |
|---|---|
| Weight | 0.1 Ounces |
| Length | 1181.1 Inches |
| Line Weight | 2.5 |
| Technique | Copolymer |
| Size | 5X |
| Color | Clear |
| Pieces | 1.0 Count |
| Feature | 1 Spool |
Performance notes
A single spool listed at 1181.1 inches works out to just under 100 feet, or roughly 30 meters, putting it in the same length class as the SF FL0102B-5X's 30 meter spool despite the different material tags. Copolymer at a 5X diameter is a common combination for general trout tippet, offering more stretch and forgiveness on the strike than stiffer fluorocarbon while still being fine enough for smaller dry flies and nymphs. The Line Weight figure of 2.5 likely reflects a relative diameter class rather than a pound-test breaking strength, consistent with how 5X tippet is typically sized by diameter rather than raw strength. Sold as a single spool rather than a pre-tied tapered leader, this product suits anglers who build their own leader system or need bulk tippet material for repeated re-rigging over a season rather than a ready-to-fish tapered leader out of the package.
What buyers say
A 200+ bought-last-month figure is the strongest purchase signal of any leader in this set, well ahead of the 50 to 100 range posted by most alternatives. That volume comes alongside a 4.4 star average across 102 reviews, the lowest rating here, which suggests price and availability are likely driving purchases as much as satisfaction is. A rating in the low 4s is still solidly positive, most buyers are getting what they expect, but the gap against the 4.7 to 4.8 stars posted by the Trout 87481 and Maxima MLC20 indicates a slightly higher rate of buyers walking away less impressed. For a budget spool at $8.40, that tradeoff appears to be an acceptable one for the volume of anglers buying it.
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Frequently asked questions
Why does this leader have the lowest rating but the highest sales volume?
At 4.4 stars across 102 reviews, it trails the 4.7 to 4.8 range posted by pricier alternatives, but its bought-last-month figure of 200+ is the highest in this comparison. Low price at $8.40 and full-spool length likely explain the volume even with a slightly softer rating.
How long is the spool?
The listing specs 1181.1 inches, which converts to roughly 98 feet, or close to 30 meters. That puts it in the same length range as the SF FL0102B-5X's 30 meter spool, giving plenty of material for multiple leader rebuilds across a season.
Is copolymer as good as fluorocarbon for this leader?
Copolymer trades some of fluorocarbon's near-invisibility and density for more stretch and a lower price point. At $8.40 for a full spool, this Scientific 135191 leader is a budget-friendly way to keep tippet stocked without paying for fluorocarbon-specific properties on every yard.