The Carbon Express Maxima Triad XSD in a 400 spine: 9.2 grains per inch,.166 in bore, the micro (.166) nock it takes and the 8-32 thread. Suits a medium draw of roughly 45 to 65 lb. Sourced.

Updated 05 September 2026.

Archery arrow models · specification

Carbon Express Maxima Triad XSD in a 400 spine: GPI, bore and nock

The 400 spine of the Carbon Express Maxima Triad XSD: its exact GPI, the nock and thread it takes, and the draw it suits.

The Carbon Express Maxima Triad XSD in a 400 spine weighs 9.2 grains per inch and suits a medium draw of roughly 45 to 65 lb. It takes the micro (.166) nock its.166 in bore requires and the 8-32 point thread; confirm on the maker chart for your exact draw and length.

This spinemanufacturer data, cited

Model	Carbon Express Maxima Triad XSD
Brand	Carbon Express
Spine	400
Outside diameter	.240 in OD
Weight	9.2 GPI
Grains per inch	9.2 GPI
Inside diameter	.166 in
Stock nock	micro (.166) nock
Stock insert	Carbon Express In-Out insert (97 gr), spine-specific
Point thread	8-32
Straightness	+/-.002 in
Suits	a medium draw of roughly 45 to 65 lb

The shaft

Carbon Express Maxima Triad XSD carbon arrow shaft (400 spine)

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Field notes

This is the 400 spine of the Carbon Express Maxima Triad XSD, a XSD micro (.166 in ID) shaft with a.166 in inside diameter. In this spine it weighs 9.2 grains per inch and measures.240 in OD across. A 400 spine sits at the mid range, the most common hunting-weight compound band.

Because the bore is.166 in, it takes the micro (.166) nock and the Carbon Express In-Out insert (97 gr), spine-specific, and it threads to the 8-32. Those do not change with spine; only the GPI and outside diameter move across the table.

Spine is a starting point, not a guarantee: a 400 from one brand can differ from another. Read your exact draw weight and arrow length on the maker chart or bare-shaft test before cutting a dozen, and keep the finished arrow above the 5-grains-per-pound floor.

Spec, chart, nock and concept

Carbon Express Maxima Triad XSDthe full shaft spec (300, 350, 400)Carbon Express Maxima Triad XSD spine chartwhich spine for your draw weight What an arrow spine number meanshow to read the deflection number The nock that fits this borepress-fit nock for the.166 in shaft The 5-grains-per-pound floorkeep the finished arrow heavy enough Gold Tip Airstrikeanother Gold Tip shaft

Questions and answers

What is the model of the Carbon Express Maxima Triad XSD in a 400 spine?

Carbon Express Maxima Triad XSD

What is the brand of the Carbon Express Maxima Triad XSD in a 400 spine?

Carbon Express

What is the spine of the Carbon Express Maxima Triad XSD in a 400 spine?

400

What is the outside diameter of the Carbon Express Maxima Triad XSD in a 400 spine?

.240 in OD