Altra Centrum Premier .166 – Kauffman Custom Build

Flagship Micro-Diameter Carbon. NO SPINE™ Technology. Match-Grade `±.001"` Consistency.

When extreme downrange accuracy, minimal wind drift, and deep penetration on big game are non-negotiable, the Altra Centrum Premier .166 sets the gold standard for micro-diameter arrow architecture. Built from a proprietary blend of high-modulus carbon, the Centrum Premier features Altra's revolutionary NO SPINE™ Technology—eliminating traditional structural seams to deliver 360-degree radial consistency and effortless tuning. With an industry-leading ±.001" straightness specification and tight ±1 grain per-pack weight sorting, this shaft is designed for bowhunters who settle for nothing less than match-grade tolerances.

At Kauffman Custom Archery, we take Altra’s flagship micro carbon and apply our complete studio bench prep, creating custom-built projectiles that hit bullet-holes through paper and stack broadheads at long distance.

The Kauffman Custom Studio Difference

Micro-diameter shafts paired with outsert systems demand flawless shop prep to prevent front-end runout and broadhead wobbles. We eliminate factory assembly flaws through a dedicated bench workflow:

Radial Indexing & Verification: Even with Altra's seamless NO SPINE™ construction, we spin-test every shaft to verify dynamic stiffness and index nocks for identical dynamic flex out of your bow.
Dual-End Diamond Squaring: Both carbon ends are trimmed and precision-squared using diamond wheels, guaranteeing a perfect 90-degree seating face for Altra's A.R.C.O.S. insert/outsert system and micro nocks.
Custom Hand Fletching: Shafts are thoroughly degreased, wrapped with heavy-duty Onestringer custom wraps, and hand-fletched with high-profile vanes (Q2i Rapt-X or AAE Max Stealth) using precise helical orientation.
Grain Matching: Your set is sorted to maintain tight total-arrow mass groupings across the entire dozen.

Technical Specifications

Shaft Inside Diameter: .166" (Micro Diameter)
Carbon Construction: Proprietary High-Modulus Carbon with NO SPINE™ Radial Consistency
Straightness Tolerance: Premier Match Grade ±.001"
Weight Tolerance: ±1.0 Grain per dozen package
Insert System: Altra A.R.C.O.S. Aluminum/Stainless Steel Insert/Outsert System included
Nocks: Included Altra Micro Nocks
Spine Options: 250 (10.9 gpi), 300 (9.8 gpi), 340 (8.8 gpi), 400 (8.2 gpi), 500 (7.2 gpi)

Custom Build Options (Configured Above)

Select Your Spine: Matched precisely to your draw weight, draw length, and tip weight setup.
Precision Carbon Length: Clean-cut to your exact carbon-to-carbon specifications.
Front-End Weight Setup: Standard A.R.C.O.S. System or Heavy Stainless Steel Insert upgrades.
Custom Fletch & Wrap: Select wrap pattern, vane style, helical offset, and cock-vane accent color.

Want to test flight this shaft on your own setup before committing to a full dozen?

Order a single, bench-prepped sample arrow through our Test Flight Program. We will spine-index, dual-end square, wrap, and hand-fletch a single shaft to your exact specs and ship it straight to your door. Shoot it on your home range, test your broadhead flight, and use the included Store Credit Voucher directly toward your full dozen custom order!