Resources | Spine Chart, Technology & FAQ

Resources

Spine Chart

Reference specifications for the Speed X 3.2 platform. Full charts for every series are available on each product page — or contact us and we'll help match a spine to your draw weight and length.

Spine	Shaft Length	Inner Ø	Outer Ø	GPI	Max Cut
350	33"	3.2mm / 0.125"	5.40mm / 0.213"	7.7	5"
400	33"	3.2mm / 0.125"	5.28mm / 0.208"	7.2	5"
450	33"	3.2mm / 0.125"	5.15mm / 0.203"	6.8	5"
500	32"	3.2mm / 0.125"	5.05mm / 0.199"	6.6	3.5"
550	32"	3.2mm / 0.125"	4.97mm / 0.196"	6.3	3.5"
600	30"	3.2mm / 0.125"	4.84mm / 0.191"	6.1	3.5"
650	29"	3.2mm / 0.125"	4.80mm / 0.189"	5.9	3.5"
700	29"	3.2mm / 0.125"	4.72mm / 0.186"	5.5	Unlimited

Cutting note: shafts should be cut from the point end only to maintain the intended spine profile.

Technology

360° Consistent Flex

Every Zone shaft is built with premium 40T carbon fibre and engineered for consistent dynamic reaction around the full circumference of the shaft.

Premium 40T carbon fibre construction
Straightness tolerance ±0.001"
Weight tolerance ±1 grain per dozen
Consistent reaction for finger and release shooters

Find Your Arrow

Support

Frequently Asked Questions

Do you ship to New Zealand?

Yes — zonearrows.com.au is set up for both Australia and New Zealand. NZ shipping and duties are calculated at checkout.

How do I choose the right spine?

Start with the spine chart above, matched to your draw weight, draw length and point weight. If you're between spines or switching brands, contact us — matching archers to the right shaft is what we do.

Can I mix spines in a dozen?

On selected first-run releases (like Speed X 3.2 First Run) you can choose two spine options in your first dozen — ideal when you're switching and want to confirm your tune.

Are Zone components compatible with other brands?

Zone shafts are compatible with standard-size components (e.g. 4.5mm out nocks on the 3.2mm platform), but Zone system components are recommended for best fit. Some third-party components may require minor fitting adjustment.

Should I cut shafts from the point end or nock end?

Always cut from the point end only. This maintains the intended spine profile — especially important on barrelled shafts.

What's your returns policy?

Unused, uncut shafts can be returned within 30 days. Cut or fletched shafts can't be returned. Full policy details will be published at launch.