Callaway Quantum Triple Diamond vs Mizuno JPX One Select Drivers (2026)

Loft options, stock shafts and specs for two drivers golfers cross-shop. Callaway Quantum Triple Diamond and Mizuno JPX One Select each have a full page.

At a Glance

Spec	Callaway Quantum Triple Diamond	Mizuno JPX One Select
Category	Tour	Tour
Model year	2026	2026
Loft options	8° to 10.5°	9° to 10.5°
Head size	440cc	460cc
Adjustable hosel	Yes	Yes
Stock shafts	Fujikura Ventus Blue 7, Fujikura Ventus Blue 6	Fujikura Ventus Blue 7, Fujikura Ventus Blue 6
MSRP	$649	$549
Technology	Low Spin	Low Spin

Key Differences

•The Quantum Triple Diamond comes in 8° to 10.5° (3 lofts), the JPX One Select in 9° to 10.5° (2 lofts). The Quantum Triple Diamond gives you more loft choices. The Quantum Triple Diamond goes lower, which suits faster swings that fight spin.
•Head size differs: 440cc on the Quantum Triple Diamond against 460cc on the JPX One Select; the smaller head is usually the more workable, less forgiving one.
•At list price the JPX One Select is $100 cheaper than the Quantum Triple Diamond ($549 vs $649 MSRP).

Loft Options and Stock Shafts

Callaway Quantum Triple Diamond vs Mizuno JPX One Select loft options and stock shafts
Loft	Callaway Quantum Triple Diamond	Mizuno JPX One Select
8°	Fujikura Ventus Blue 7 (x_stiff)	-
9°	Fujikura Ventus Blue 7 (x_stiff)	Fujikura Ventus Blue 7 (x_stiff)
10.5°	Fujikura Ventus Blue 6 (stiff)	Fujikura Ventus Blue 6 (stiff)

Stock shafts shown are the representative options on file for each loft; retailers and fitters carry more.

Verdict

The Mizuno JPX One Select and the Callaway Quantum Triple Diamond are both low spin tour drivers with adjustable hosels and the same Fujikura Ventus Blue stock shafts. What separates them is the head. The JPX One Select is a full 460cc head in 9° or 10.5°. The Quantum Triple Diamond is 440cc and adds an 8° option. A smaller head is usually easier to shape and less forgiving on off-center strikes, and that 8° loft is aimed at fast swings that fight spin. The Callaway suits the player who wants to work the ball and can give up some forgiveness. The Mizuno suits the player who wants a low spin tour head with a full-size footprint.

For most golfers, the JPX One Select is the pick. It lists at $549, $100 less than the Quantum Triple Diamond at $649, and the larger head should be the more forgiving of the two. Choose the Quantum Triple Diamond if you need the 8° loft to hold spin down, or if a compact, workable 440cc head matters more to you than forgiveness. If price is no object and shot shaping is the priority, the Callaway is worth the extra. Otherwise, save the money.

Frequently Asked Questions

Which comes in lower lofts, the Quantum Triple Diamond or the JPX One Select?

The Quantum Triple Diamond goes lower, starting at 8° against 9° for the JPX One Select. Lower loft suits faster swings that generate too much spin; most golfers do better with a higher-lofted option.

Which costs more, the Quantum Triple Diamond or the JPX One Select?

At list price the JPX One Select is the cheaper driver: $549 against $649 MSRP. The older of the two usually carries the bigger discount.

Are the Quantum Triple Diamond and JPX One Select in the same category?

Yes. Both are tour drivers, so forgiveness and spin profile are broadly comparable and the choice comes down to loft options, shaft and feel.

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