Update (August 2026): Project X has retired the HZRDUS line after five generations — its replacement is the new Titan Black; see our Project X Titan shaft chart for the successor's weights, flexes, and what changed. HZRDUS remains widely played and in stock, and everything below still decodes it.

The quick answer: HZRDUS shafts use Project X's numeric flex system — 5.5 is Regular, 6.0 is Stiff, 6.5 is X-Stiff, TX is Tour X — and the model color tells you the flight: Black is the low/low spin-killer, Blue is the versatile mid-launch, Red is the highest-launching and easiest to load. The full model-by-model chart is below.

HZRDUS is Project X's low-spin graphite wood family, and it's grown into a lot of models: Gen 5 Black, Gen 4 Silver and Red CB, three Smoke RDX profiles, the IM10, and a decade of legacy versions still all over the used market. This chart sorts every current model by launch, spin, weight, and flex — and decodes the numbering while we're at it.

HZRDUS Shaft Chart: Every Current Model

Flexes across the family run 5.5 (R), 6.0 (S), and 6.5 (X), with TX available in select tour models and weights. Within any model, the lighter weights launch and spin a touch more than the heavier ones — a 60g Black flies higher than a 70g Black.

What the HZRDUS Numbers Mean (5.5, 6.0, 6.5, TX)

HZRDUS borrows the numeric flex system from the Project X iron shafts: 5.5 = Regular, 6.0 = Stiff, 6.5 = X-Stiff, TX = Tour X. Two things trip people up:

1. HZRDUS plays firmer than the letter suggests. Like everything in the Project X family, an HZRDUS 6.0 feels and performs stouter than most brands' Stiff. Players on a flex borderline usually do better a half-flex down — there are plenty of documented cases of 110+ mph players gaming HZRDUS Black in 6.0 rather than 6.5.

2. The right flex shifts by model. The stout Black wants more speed at the same number than the livelier Red. Here's the flex-by-swing-speed breakdown for the two ends of the family — Blue and Silver sit between them:

These bands match our full Project X shaft selector chart, which also covers the iron shafts and swing-speed measurement.

Practical shortcut: if an HZRDUS is already in your bag, add it to your bag in the app with the flex exactly as printed — 5.5, 6.0, TX. The app decodes the numbering automatically and grades your set's flex consistency by playing flex, not by label.

Model by Model

HZRDUS Black Gen 5 (low launch, low spin)

The flagship spin-killer, now in its fifth generation ("5G"). Available in 60g and 70g at 5.5, 6.0, and 6.5. Gen 5 adds a 4D carbon weave in the midsection for torsional stability, but the fitting profile is unchanged from Gen 4: aggressive, fast-tempo swings at 105+ mph that need launch and spin suppressed. If your driver ball flight is a climbing spinner, this is the medicine; if you're under ~100 mph, it's usually too much shaft.

HZRDUS Silver Gen 4 (mid launch, mid-low spin)

The balanced one — a tour-caliber mid-launch profile that fits the widest swing-speed range of the non-Smoke models. Think of Silver as the answer when Black kills your launch but you still want HZRDUS stability.

HZRDUS Red CB Gen 4 (mid-high launch, counterbalanced)

The easiest-launching current HZRDUS, in lighter weight classes (down into the 40–50g range) with a counterbalanced design that keeps swingweight manageable in today's heavier adjustable heads. Built for moderate swing speeds that still want the HZRDUS feel without giving up carry.

HZRDUS Smoke Black RDX (low-mid launch, low spin)

Black-style spin control with a slightly friendlier load. Comes in 50, 60, and 70g. The RDX generation is counterbalanced with a softer midsection, so it feels livelier than the original Smoke Black while keeping flight down. The 70g 6.0 is a classic strong-player fairway-wood setup.

HZRDUS Smoke Blue RDX (mid launch, mid-low spin)

The most versatile shaft in the family — True Temper tunes its bend profile per flex, so the 5.5 is genuinely built for 5.5-speed players rather than being a softened 6.5. If you're unsure which HZRDUS you are and you're not an obvious Black candidate, Blue RDX is the default demo.

HZRDUS Smoke Red RDX (mid-high launch, mid spin)

The highest-launching Smoke, and the one with the widest weight range: 60, 70, and 80g. Fits 90–105 mph players who need more carry height than Black or Blue allow — and the 80g version doubles as a control-heavy fairway shaft.

HZRDUS Smoke IM10 (mid-low launch, premium build)

The premium aerospace-carbon (HexTow) version — tighter tolerances, smooth mid-low flight, in 50/60/70g. Priced above the rest; performance-wise it slots between Black and Blue.

Legacy models: original Black, Yellow, Red, T800, T1100

The first-generation HZRDUS line (and the T-series) is discontinued but everywhere on the used market. Rough translation to current models: original Black → Black Gen 5, Yellow (stout butt, low launch) → Silver or Smoke Black RDX, original Red → Smoke Red RDX, T800 (lightweight, higher launch) → Red CB, T1100 (heavy tour low-spin) → Black Gen 5 70g in TX. Specs drifted between generations, so treat a used shaft's model+flex as a starting point, not a guarantee it matches the current chart.

"Handcrafted" vs Stock HZRDUS: Not the Same Shaft

If your driver came with an HZRDUS shaft from the factory — often marked with an odd weight like "Black 75" and the words "non-handcrafted" in resale listings — know that OEM stock versions are made-for-manufacturer builds that can differ from the aftermarket "Handcrafted" versions in materials, weight, and bend profile. They're real HZRDUS shafts, but they are not spec-identical to the charts above. A stock HZRDUS that feels nothing like the aftermarket one you demoed isn't your imagination — check the exact version before assuming the fit translates.

Picking Your HZRDUS: The Two-Question Shortcut

Question 1 — what's your miss? Ballooning, spinny drives → Black (or Smoke Black RDX). Low bullets that fall out of the air → Smoke Red RDX or Red CB. Neither extreme → Blue RDX or Silver.

Question 2 — what's your speed? Use the flex table above, and remember the family plays firm: on a borderline, take the softer flex. Weight follows speed and tempo — 60g is the standard driver weight, 50g for smoother or slower swings, 70–80g for strong swings and fairway woods.

Frequently asked questions

What do the numbers on HZRDUS shafts mean?

They're Project X's flex ratings: 5.5 equals Regular, 6.0 equals Stiff, 6.5 equals X-Stiff, and TX is Tour X. There's no industry standard for flex, and HZRDUS runs firm for its label — a 6.0 plays stouter than most brands' Stiff.

What swing speed do you need for an HZRDUS 6.0?

Roughly 100–110 mph of driver speed in the stout Black, or 95–105 mph in the livelier Red — the same number wants a bit more speed in the lower-launching models. On the borderline, go 5.5: the family's firm feel punishes under-speeding more than over-speeding.

Is HZRDUS 5.5 a regular flex?

Yes, 5.5 is the Regular designation — but it plays firmer than a typical R. It fits roughly 85–100 mph driver speeds depending on the model, which overlaps territory where many brands would put you in Stiff.

What's the difference between HZRDUS Black and Blue?

Black is the low-launch, low-spin model for aggressive 105+ mph swings. Smoke Blue RDX is the mid-launch all-rounder that fits the broadest range of speeds and tempos. If you don't have a clear spin problem, start with Blue.

Which HZRDUS launches the highest?

Among current models, the Red CB Gen 4 — counterbalanced, lighter weights, mid-high launch and spin. In the Smoke RDX line, Red RDX is the high-launch option.

Is the stock HZRDUS in my driver the same as the aftermarket version?

Usually not. OEM stock ("non-handcrafted") versions are made-for-manufacturer builds that can differ in materials and profile from the aftermarket Handcrafted line, even under the same color name. Check the exact version printed on the shaft before assuming chart specs apply.

Related reading

• Project X Shaft Selector Chart: Flex by Swing Speed — The full family selector, irons included, with HZRDUS Black and Red speed bands.
• Project X Shaft Weights & Specs Chart — Every gram figure for the steel iron side of the family: PX, LZ, IO, LS.
• Golf Swing Speed Chart: Shaft Flex by Club Head Speed — The brand-neutral flex chart, plus how to measure your speed.
• Golf Shaft Weight Guide — Why 60g vs 70g changes more than you think.

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Know the shaft. Now check the whole bag. The FitMyGolfClubs app grades all 14 clubs across eight fitting factors — shaft flex and weight included — straight from your specs. Free to start.