Shaft
The shaft is the main structural tube of an arrow — the body that carries the insert at the front, fletching at the rear, and bushing or nock at the very back. Shaft material, diameter, and weight per inch (GPI) determine the arrow's spine, weight, and ultimately its flight characteristics.Details
The three dominant materials are pure carbon, aluminum, and aluminum-carbon hybrids. Carbon shafts dominate the market because they are light, tough, and available in a wide spine range; they do not dent but can crack on hard impacts. Aluminum shafts — historically the standard through the 1990s — are dimensionally very consistent and forgiving to tune but dent rather than crack and weigh more. Aluminum-carbon hybrids such as the Easton X10 and ProTour place a carbon layer over an aluminum core to combine dimensional precision with low weight; they are the shaft of choice for elite target competition.
Diameter classes matter for different applications. Standard-diameter shafts run around 0.244 inches outer diameter and accept a wide range of components. Micro-diameter shafts (roughly 0.204" OD) cut through wind better and present a smaller target-face cross-section, making them popular for outdoor target and 3D. Ultra-micro shafts (as small as 0.166" OD) are common in high-FOC hunting builds where a narrow, heavy shaft drives deep penetration. Each diameter class requires diameter-matched inserts, outserts, nocks, and bushings.
Grains per inch (GPI) is the shaft's weight density. Light shafts (5–7 GPI) prioritize speed and flat trajectory — suited for 3D courses and indoor target where wind is not a factor. Heavy shafts (9–14+ GPI) add momentum and kinetic energy, improve FOC when combined with heavy front-end components, and are the choice for bowhunters targeting large or dangerous game. Mid-weight shafts (7–9 GPI) cover most compound and recurve target applications.
Cut length is the final variable. The general guideline is to cut the shaft so it extends at least one inch past the front of the rest at full draw — typically one to one-and-a-half inches beyond the plunger hole or launcher blade. Cutting shorter than that risks the arrow falling back onto the rest at full draw. After spine-chart selection, bare-shaft tuning or walk-back tuning can confirm whether a slightly shorter or longer cut improves dynamic spine alignment.
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- Should I choose carbon or aluminum arrows?
- Carbon is the right choice for most archers — it is lighter than aluminum, does not dent, and comes in every spine and diameter class. Aluminum is worth considering if you value exceptional dimensional consistency for high-volume indoor practice or are fitting components to a very specific tolerance. Hybrid aluminum-carbon is the top-tier option for elite target competition but comes at a significant cost premium.
- What diameter shaft should I use for hunting versus target archery?
- Standard-diameter shafts are versatile and work well for most compound and recurve target shooting. Micro-diameter shafts offer a wind-cutting advantage for outdoor target and 3D competition. For bowhunting, diameter choice depends on the quarry: standard or micro-diameter shafts suit deer and medium game; ultra-micro hunting shafts paired with heavy outserts and high-FOC setups are preferred by hunters pursuing penetration-critical large or dangerous game.
- How long should I cut my arrow shaft?
- Cut the shaft so it clears the front of your arrow rest by at least one inch at full draw — never shorter, as an undercut shaft can fall back onto the rest during draw and create a dangerous situation. A common starting point is to draw an uncut arrow and mark where it sits one inch past the rest, then cut to that mark. Final length may be adjusted slightly based on dynamic spine results from paper tuning or walk-back.