Arrow spine for a 55 lb compound at a 29 inch arrow with a 100 grain point: a 400 spine (band 340-400), plus the 275 grain minimum weight. Sourced.
Updated 05 September 2026.
What arrow spine for 55 lb draw at a 29 inch arrow
The starting spine for a 55 lb draw at a 29 inch arrow with a 100 grain point, and the weight floor.
| Draw weight | 55 lb |
|---|---|
| Arrow length | 29 in (cut, nock groove to shaft end) |
| Point weight | 100 gr |
| Recommended spine | 400 (published band 340-400) |
| Minimum total weight | 275 gr, from the 5-grains-per-pound floor |
Easton 5mm Axis carbon arrow shaft (400 spine)
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A 55 lb draw at a 29 inch arrow with a 100 grain point sits mid-band and lands on 400. It is a common spine for a lighter-drawing adult hunter or a taller-draw target archer.
Spine is a starting point, not a guarantee, because a 340 from one brand can differ from another. Confirm on your arrow maker's chart at 29 inches and 55 pounds, or bare-shaft test before cutting a dozen.
Whatever spine you land on, keep the finished arrow at or above 275 grains total, the 5-grains-per-pound floor, so the bow is not shooting dangerously light.
The rules behind this pick
Questions and answers
What arrow spine for 55 lb draw at a 29 inch arrow?
For a 55 lb draw at a 29 inch arrow with a 100 grain point, start with a 400 spine (the 340-400 band), and keep the finished arrow at or above 275 grains total.