Firenock AeroWeave 166 — .166 ID Carbon Hunting Arrows (12)
Firenock AeroWeave 166 — .166 ID Carbon Hunting Arrows (12)
Premium 4K woven-carbon micro-diameter hunting shafts. The .166 ID class is Firenock's smallest — chosen by hunters who want maximum velocity retention at long range and minimum wind drift.
- 4K woven carbon construction — exceptional straightness and tight ±0.001" tolerance
- .166" ID — pair with Firenock AeroOutsert (.166) collars for true broadhead alignment
- 12 raw shafts (no components included) — build to your exact spec
Ships from Firenock LLC. Typical lead time 3–5 business days.
Specifications and what they build
Everything below is either the manufacturer's published specification or this engine's output for a standard build — a 28.5″ finished arrow, 100‑grain point, HIT‑style insert, three vanes at 2° helical, on a 70 lb / 29″ compound rated 335 fps IBO. Nothing here is a rule of thumb and nothing is copied from a chart.
Firenock AeroWeave 166 — inner diameter class .166, outer diameter .232–.249", aerosystem hunting shaft. 0.166" ID micro-diameter. Patents 10,145,643 + 10,232,581 weave construction. AeroSystem-compatible. Dropped non-existent 250 spine. GPI corrected & verified 2026-06 vs manufacturer.
| Spine | GPI | Outer diameter | Bare shaft, 28″ (gr) | Finished arrow (gr) | Speed (fps) | KE (ft‑lb) | FOC |
|---|---|---|---|---|---|---|---|
| 300 | 10.5 | 0.249″ | 294.0 | 438 | 288 | 81 | 11.6% |
| 350 | 8.6 | 0.248″ | 240.8 | 384 | 311 | 82 | 13.3% |
| 400 | 8.2 | 0.232″ | 229.6 | 372 | 316 | 83 | 13.7% |
Which spine you need
Spine is not a property of the shaft you like, it is set by your draw weight, your finished arrow length and your point weight acting together. Read your draw weight down the left and your finished arrow length across the top. Green means this shaft is made in that spine; red means it is not, and you want a different shaft.
| Draw weight | 26″ | 27″ | 28″ | 29″ | 30″ | 31″ | 32″ |
|---|---|---|---|---|---|---|---|
| 50 lb | 400 | 340 | 340 | 340 | 340 | 340 | 340 |
| 55 lb | 340 | 340 | 340 | 340 | 340 | 300 | 300 |
| 60 lb | 340 | 340 | 340 | 340 | 300 | 300 | 300 |
| 65 lb | 340 | 340 | 300 | 300 | 300 | 250 | 250 |
| 70 lb | 340 | 300 | 300 | 300 | 250 | 250 | 250 |
| 75 lb | 300 | 300 | 250 | 250 | 250 | 200 | 200 |
| 80 lb | 300 | 250 | 250 | 250 | 200 | 200 | 200 |
The grid assumes a 100‑grain point. Going heavier up front weakens dynamic spine and pushes you one column left; going lighter pushes you right. The spine what-if tool publishes every coefficient behind this table, including how closely it agrees with Easton's, Victory's and Gold Tip's own charts.
What it is cleared for
Graded against the five energy floors we publish, each tagged with whose number it is — three are Easton's charted figures, two are ours and labelled as ours. The full reasoning, with the archive citations for the chart Easton retired in 2012, is on the kinetic energy chart by game class.
| Spine | KE (ft‑lb) | Small game 15 · judged |
Deer / antelope 25 · charted |
Elk / bear / boar 42 · charted |
Heavy game 50 · derived |
Big game 65 · charted |
|---|---|---|---|---|---|---|
| 300 | 81 | clears | clears | clears | clears | clears |
| 350 | 82 | clears | clears | clears | clears | clears |
| 400 | 83 | clears | clears | clears | clears | clears |
Target size matters as much as energy — broadside vital dimensions for 61 species are on the vital zone page.
▸ Open this shaft in The Forge — free, loads at 350 spine with the standard build above, and every number recomputes as you change it.
Common questions
Which Firenock AeroWeave 166 spine do I need?
Read it off the grid above rather than off the bow's name: at 60 lb and 28 inches it picks 340, which this shaft is not made in, at 70 lb and 29 inches it picks 300, which this shaft is made in, and at 80 lb and 30 inches it picks 200, which this shaft is not made in. Spine is set by draw weight, finished arrow length and point weight acting together. This shaft is made in 300, 350, 400 spine; check the listing options for what is on the shelf.
What does the Firenock AeroWeave 166 weigh per inch?
GPI runs from 8.2 in 400 spine up to 10.5 in 300. A bare 28-inch shaft is therefore 229.6 to 294.0 grains before any components go on. Those GPI figures are the manufacturer's published numbers, not our estimates.
What is the outer diameter of a Firenock AeroWeave 166?
It changes with spine, which is the part most charts leave out. This shaft spans .232–.249" — 300 spine at 0.249 inch; 350 spine at 0.248 inch; 400 spine at 0.232 inch. The inner diameter class is .166, and that is the number that decides which inserts, collars and nocks fit.
How heavy is a finished arrow built on a Firenock AeroWeave 166?
On the standard build we use for every comparison — a 28.5-inch arrow, 100-grain point, HIT-style insert and three vanes at 2 degrees helical — this shaft finishes at 372 grains in 400 spine and 438 grains in 300, with FOC running 13.7 percent down to 11.6 percent as the shaft gets heavier. A stiffer spine gives you a heavier, slower, higher-momentum arrow; a weaker one gives you speed and higher FOC at the same point weight.
Is a Firenock AeroWeave 166 enough arrow for elk?
At the standard build the spines here make 81 to 83 ft-lb, against the 42 ft-lb floor Easton charted for elk, black bear and boar. Every one of them clears it. That 42 is Easton's number, not ours. Energy is a floor rather than a plan, though: on elk, momentum and FOC do as much of the work as kinetic energy, and these builds sit at 0.52 to 0.56 slug-fps.
Where do these numbers come from?
GPI, outer diameter and inner diameter are the manufacturer's published specifications. Our verification note for this shaft reads: 0.166" ID micro-diameter. Patents 10,145,643 + 10,232,581 weave construction. AeroSystem-compatible. Dropped non-existent 250 spine. GPI corrected & verified 2026-06 vs manufacturer. Everything else on this page is computed by the same physics engine that runs The Forge — IBO-corrected launch speed for the stated draw weight, draw length and finished arrow mass, Easton-method kinetic energy and momentum, and a spine model published in full alongside its measured agreement with each manufacturer's own chart.
Specifications are the manufacturer's published figures; every derived number is this engine's output, reproducible from the inputs stated above. If a spec here disagrees with the manufacturer, the manufacturer is right and we want to hear about it.