Every few weeks an archer walks into the shop with a catalog or a screenshot from a website that lists their custom strings as “BCY 452X.” They ask why ours are $20 more when “it’s the same stuff.” It’s not the same stuff. The name looks nearly identical, the catalog listings look nearly identical, and that’s exactly why this confusion persists.
This post explains, in plain language, what actually separates BCY 452 Extra from BCY 452X, and why we will not sell a custom string made with 452X, even when a customer asks.
The two materials, clearly
BCY 452 Extra is the current generation of BCY’s premium hybrid bowstring material. Introduced in 2012. Blend of Dyneema and Vectran fibers at an improved ratio over the previous generation. Available in dozens of colors. Used on virtually every factory-strung flagship compound bow from 2013 forward at the premium tier.
BCY 452X is the previous generation. Introduced around 2003. Older blend, less creep resistance, more post-install peep rotation, slightly rougher feel, and more susceptible to heat degradation.
The two are not interchangeable. The “X” does not stand for “extra.” 452 Extra is a different, newer product.
Why the names are so easy to confuse
BCY named its premium materials sequentially. There was 452, then 452X, then 452 Extra. Each was an incremental improvement at the time of release. Store clerks, online listings, and even some long-standing shop owners use “452X” loosely to mean “BCY’s premium hybrid material”, which was accurate in 2008 and is inaccurate in 2026.
Unfortunately, the confusion persists because:
- Some suppliers still stock 452X spools because they bought bulk 10 years ago and haven’t used them up
- Some online listings still show 452X when the seller has moved to 452 Extra but hasn’t updated text
- “452X” sounds like “just another spelling” to someone who doesn’t know the product history
We clarify because this is a spot where customers lose money. A custom string at the 452 Extra tier should be priced at the current 452 Extra market rate. A “custom string in 452X” is materially cheaper, but it’s also a string made from material that behaves worse over time.
What actually changes between the two materials
Four things change in 452 Extra compared to 452X:
Creep resistance. Creep is the string’s tendency to stretch over time under the tension of the limbs when the bow is at rest. A stretchy string changes the bow’s peak poundage, its draw length, and the position of the peep sight. 452 Extra creeps about 40% less than 452X on the same bow over the same time window.
Heat tolerance. In a hot car in Florida in July, interior temps of 140°F+ are common, a 452X string softens at a temperature where 452 Extra remains stable. Warmer materials stretch more. More stretch means more peep rotation, more draw length change, and more shot-to-shot inconsistency.
Peep rotation stability. The #1 complaint we hear after a string replacement: “My peep won’t stay straight at full draw.” Older materials shift more over the first 100 shots while the string “settles.” 452 Extra settles faster and stays settled longer.
Color fade. Florida sun fades older string materials faster. 452 Extra holds color better, but neither material is UV-proof. Both fade if left on a bow in direct sun for months.
What this means for your bow in Florida
Florida archers ride the edge of what bowstring material can tolerate. Summer heat in a truck cab, humidity that swings 40 points in a single afternoon, and UV exposure that eats color on any material, this is not Colorado weather where string choices are less critical.
On a Florida bow, 452 Extra gets you:
- Longer shot-to-shot consistency in hot months
- Less peep drift requiring re-tuning mid-season
- Cleaner peak-poundage retention through a summer’s practice
- Less fuzz development on the serving from heat softening
The difference is real. It’s not marketing. We’ve done side-by-side tests with the same archer on identical bows, one built with 452X, one with 452 Extra, both tuned identically, and the 452 Extra setup holds tune longer.
Why we refuse to build custom strings with 452X
We make custom strings at the shop for archers driving in from Tampa, Miami, Fort Myers, and across Florida. Our policy is simple: every custom string we build uses BCY 452 Extra. We do not stock 452X. We will not build a string with it even if a customer asks us to.
The reason is that we guarantee our strings. If a customer’s bow goes out of tune in a month, we want the material we built with to be the best available. 452X doesn’t meet that standard.
It’s also a reputation issue. If we build strings in 452X, a year from now someone else takes credit for the cleaner 452 Extra work and we’re stuck explaining why our older strings drift. Not worth it.
What to look for when buying custom strings
If you’re ordering a custom string set online or from another shop, ask these three questions:
- What exact string material? Not “BCY hybrid”, the specific product name. If the answer is “452X,” walk away unless the price is significantly lower AND you understand what you’re buying.
- How many end-servings per loop? Quality hand-built strings use a specific number of end-serving wraps for durability. Fewer than 4 wraps per loop is cheap.
- What’s the pre-stretch time? High-quality custom strings are put under tension for 8–24 hours on a jig before being released to the customer. This eliminates the first round of creep. A string that was “made yesterday and shipped same day” has not been pre-stretched.
The answer to question 1 should always be either “BCY 452 Extra” or one of the other current premium materials (BCY 8190, BCY X99, or the high-end Fury lines). Any answer starting with “X” or “older” is a warning.
On the other premium string materials
BCY isn’t the only premium string maker. Brownell also makes excellent materials. If another shop is building your strings, they may be using different premium fibers. That’s fine, the key is current-generation, not specifically BCY.
At our shop we use 452 Extra because we’ve built several hundred strings with it over the years and we know exactly how it behaves on every bow we’ve worked on. That consistency matters more than experimenting with newer or alternative materials.
Ready for strings that stay tuned?
If your current strings are drifting, your peep won’t stay aligned, or you’re just coming up on the 1,500-shot replacement interval, we build custom bow strings in dozens of colors, every string in BCY 452 Extra, pre-stretched and guaranteed.
We also ship custom strings to archers across Florida who can’t make the drive, just text us your bow model and string length requirements.
Request custom string quote or call (941) 322-7146, we’ll match your colors and have your set built inside two weeks.