Archery arrow models · bolt datasheet

Carbon Express Maxima Triad XSD spine chart: which spine for your draw

Which Carbon Express Maxima Triad XSD spine to choose for your draw weight and point, from its published range.

Dry-fire warning

Crossbow bolt data and archery arrow spine, nock and thread data are quoted from each manufacturer's published figures, owner documentation and industry standards, cited on every page. A nock, spine or grain-weight mismatch can cause a dry-fire that damages the bow and can injure the shooter. Confirm against your own owner's manual and the arrow maker's own chart before shooting, and never drop below the stated minimum total weight.

For the Carbon Express Maxima Triad XSD, a lighter (40-50 lb) setup takes the 400 spine, a medium (55-65 lb) setup the 350, and a heavy (65-75 lb) setup the 300, before adjusting for point weight. Read your exact draw weight and length on the maker's chart.

Spine by setupmanufacturer data, cited

Available spines	300, 350, 400
Light setup (about 40-50 lb)	400 spine, the weakest offered that suits a lighter draw
Medium setup (about 55-65 lb)	350 spine, the mid choice with a 100 grain point
Heavy setup (about 65-75 lb)	300 spine, the stiffest choice for a heavy draw or point
Point-weight adjustment	Move one spine group stiffer per 25 grains of point weight over 100 grains

The shaft

Carbon Express Maxima Triad XSD carbon arrow shaft

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Field notes

The Carbon Express Maxima Triad XSD is offered in 300, 350, 400 spine. Spine tracks draw weight: a lighter bow flexes the shaft less and wants a weaker (higher-number) spine, a heavier bow wants a stiffer (lower-number) one.

These bands follow the widely published spine ranges, roughly 500 to 600 for a 25 to 45 pound draw, 340 to 400 for 45 to 65 pounds, and 250 to 300 for 65 pounds and up, then adjusted for arrow length and point weight.

Treat this as the starting point the way an archery shop does, then confirm your exact draw weight and arrow length on the manufacturer chart or with a bare-shaft test before cutting a dozen.

Spec, concept and worked setups

Carbon Express Maxima Triad XSDthe full shaft spec What an arrow spine number meanshow to read the number Spine for 60 lb at 29 ina worked setup The nock that fits this shaftmatch the bore The 5-grains-per-pound floorkeep it heavy enough

Sources: Carbon Express Maxima Triad XSD arrow shaft spec (Lancaster Archery listing) · Carbon Express Maxima Triad (Feradyne Outdoors product page) · Nock On Archery - Arrow Spine Chart: choosing the correct spine