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The most broadly compatible parts
24
What an arrow spine number means fits 24 of the combinations we checked directly, more than any other of the 18 parts in the dataset.
Which part fits the most setups?
What an arrow spine number means is the most broadly compatible, fitting 24 combinations directly (80% of the 30 we checked for it). The full ranking is below.
| # | Parts | Direct fits | Combinations checked | Direct-fit rate |
|---|---|---|---|---|
| 1 | What an arrow spine number means | 24 | 30 | 80% |
| 2 | The 5-grains-per-pound floor (vertical bow) | 24 | 24 | 100% |
| 3 | Easton 5mm Axis | 20 | 20 | 100% |
| 4 | The arrow-length rule | 20 | 20 | 100% |
| 5 | The 5-grains-per-pound minimum | 12 | 38 | 32% |
| 6 | Half-moon nock | 7 | 7 | 100% |
| 7 | Flat nock | 4 | 4 | 100% |
| 8 | Excalibur Quill 16.5 | 4 | 4 | 100% |
| 9 | CenterPoint 20 in carbon arrow | 4 | 4 | 100% |
| 10 | Barnett Headhunter arrow | 3 | 3 | 100% |
| 11 | Gold Tip Hunter XT | 2 | 2 | 100% |
| 12 | G and F nock (.166 shaft) | 2 | 2 | 100% |
| 13 | Excalibur Proflight 16.5 | 1 | 1 | 100% |
| 14 | Excalibur Rhino nock | 1 | 1 | 100% |
| 15 | X and A nock (.204 shaft) | 1 | 1 | 100% |
| 16 | GT nock (.246 shaft) | 1 | 1 | 100% |
| 17 | Victory VAP 166 Elite V1 | 1 | 1 | 100% |
| 18 | Carbon Express Maxima Triad XSD | 1 | 1 | 100% |
How this is worked out
For every part we counted the compatibility combinations that resolve to a direct fit (no adapter needed) across every combination in the reference set, and ranked by that count. The direct-fit rate is direct fits divided by all combinations checked for that item.
Data as of 2026-09-05.
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