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3/8X14 21.3mm (Cynergy)

Cuetec's Cynergy joint keeps the AVID line's 3/8-14 thread pitch but widens the collar to 21.30mm to fit Cuetec's Cynergy carbon-fiber shaft, developed with input from five-time U.S. Open champion Shane Van Boening. Quarter King carries 30 cues on this joint, priced from about $270 to about $1,090.

Every item is brand new and 100% genuine, backed by its full manufacturer warranty. Free shipping on orders over $98 (contiguous US) and 30-day returns. Every spec on this page is checked against the manufacturer's published data by our Wilmington, NC store team.

5.0/5 average from 96 customer reviews across 3/8X14 21.3mm (Cynergy).

30 3/8X14 21.3mm (Cynergy)
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★★★★★
Original price was: $319.00.Current price is: $289.00.
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Original price was: $1,049.00.Current price is: $949.00.
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Original price was: $1,049.00.Current price is: $949.00.
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★★★★★
Original price was: $429.00.Current price is: $389.00.
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Original price was: $899.00.Current price is: $815.00.
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Original price was: $899.00.Current price is: $815.00.
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Original price was: $899.00.Current price is: $815.00.
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Out of Stock Cuetec AVID Chroma CTAC8 pool cue in blue and silver.
★★★★★
Original price was: $319.00.Current price is: $289.00.
Out of Stock
★★★★★
Original price was: $319.00.Current price is: $289.00.
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★★★★★
Original price was: $319.00.Current price is: $289.00.
Add to Cart
★★★★★
Original price was: $319.00.Current price is: $289.00.
Add to Cart
★★★★★
Original price was: $319.00.Current price is: $289.00.
Add to Cart
★★★★★
Original price was: $319.00.Current price is: $289.00.
Add to Cart
★★★★★
Original price was: $319.00.Current price is: $289.00.
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★★★★★
Original price was: $455.00.Current price is: $409.00.
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★★★★★
Original price was: $475.00.Current price is: $425.00.
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★★★★★
Original price was: $455.00.Current price is: $409.00.
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Original price was: $455.00.Current price is: $409.00.
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Original price was: $439.00.Current price is: $399.00.
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Out of Stock Cuetec Avid Opt-X CT380 Gold Cue - 12.75mm
★★★★★
Original price was: $475.00.Current price is: $425.00.
Out of Stock
★★★★★
Original price was: $1,189.00.Current price is: $1,089.00.
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★★★★★
Original price was: $1,139.00.Current price is: $1,039.00.
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★★★★★
Original price was: $1,099.00.Current price is: $939.00.
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★★★★★
Original price was: $1,109.00.Current price is: $999.00.
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★★★★★
Original price was: $1,059.00.Current price is: $939.00.
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★★★★★
Original price was: $999.00.Current price is: $899.00.
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★★★★★
Original price was: $1,109.00.Current price is: $999.00.
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Out of Stock Cuetec CT104NW Truewood pool cue, no wrap billiard cue detail
★★★★★
Original price was: $1,059.00.Current price is: $939.00.
Out of Stock
★★★★★
Original price was: $999.00.Current price is: $899.00.
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Read the 3/8X14 21.3mm (Cynergy) guide

About 3/8X14 21.3mm (Cynergy)

What the Cynergy 3/8-14, 21.3mm joint is

The thread pitch is identical to standard AVID cues, but the collar around the joint is wider, at 21.30mm, sized specifically for Cuetec's Cynergy shaft. That shaft is built from spun 15K carbon fiber over a poly-foam core, aimed at low deflection while still giving feedback closer to wood than a hollow carbon tube. The wider collar is what lets the shaft's larger-diameter carbon construction mate properly to the butt.

Cuetec developed the Cynergy shaft with input from five-time U.S. Open champion Shane Van Boening, and it now anchors several of Cuetec's higher-tier cue lines, including the AVID Chroma color series and the Avid Opt-X models. Because the shaft's performance depends on that specific carbon layup and core, the joint collar was built to a matching spec rather than retrofitted onto the existing 3/8-14 AVID collar. The Cynergy shaft is offered in a small range of tip diameters, so buyers can pick the diameter that suits their grip and tip preference while keeping the same 21.30mm collar and 3/8-14 thread pitch underneath. That gives players some room to adjust feel at the tip without needing an entirely different joint or cue underneath, since the collar and thread stay fixed across the tip diameter options.

How it plays and who it suits

Pairing this joint with the Cynergy shaft targets players who want Cuetec's premium low-deflection carbon technology without stepping outside the AVID-family joint system entirely. It suits players upgrading from a standard AVID cue who specifically want the Cynergy shaft's low-deflection, wood-like feedback, provided the collar size on their cue matches. Low-deflection carbon fiber shafts like this one are generally built to reduce cue ball squirt on off-center hits compared with a standard solid wood shaft, which is the main reason players pay a premium for the Cynergy-collar cues over a plain AVID model.

Cynergy joint cues at Quarter King

All 30 cues on this joint come from Cuetec, with one Quarter King Billiards house listing alongside them, priced from about $270 to about $1,090. The lineup includes the AVID Chroma color series, such as the Cuetec AVID Chroma CTAC1, Bordeaux and Cuetec AVID Chroma CTAC4, Sage, plus the Cuetec Avid Opt-X CT380 Gold Cue, 12.75mm and the Cuetec AVID CT338NW Surge Break Cue. Shop the full range under Cuetec.

How to choose and compatibility

The 21.30mm collar is wider than the standard AVID 3/8-14 joint, so the two are not drop-in interchangeable even though the underlying thread pitch matches. Always confirm collar diameter, not just the pin thread, before ordering a shaft upgrade, and look at carbon fiber shafts if you're shopping for a Cynergy-compatible replacement. Our shaft fit finder can help confirm the match.

Frequently asked questions about 3/8X14 21.3mm (Cynergy)

What makes the Cynergy joint different from standard AVID?

It uses the same 3/8-14 thread pitch as standard AVID cues, but with a wider 21.30mm collar built to fit Cuetec's Cynergy carbon-fiber shaft.

Who designed the Cynergy shaft?

Cuetec developed the Cynergy shaft with input from five-time U.S. Open champion Shane Van Boening. It uses spun 15K carbon fiber over a poly-foam core.

Will a standard AVID shaft fit a Cynergy joint cue?

Not reliably. The collar diameters differ, so fit should be confirmed by collar size, not just by matching the 3/8-14 thread pitch.

What price range do Cynergy joint cues fall in at Quarter King?

About $270 to about $1,090 across the Cuetec AVID Chroma, Opt-X and Surge break cue lines currently in stock.

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