The Yonex ASTROX 100ZZ is already an aggressive frame by design.

It comes with:

• A clearly head-heavy balance

• A stiff to extra-stiff shaft

• A relatively compact sweet spot

• Short shuttle hold time

Because of this, your string and tension choice should complement the racket’s built-in power, not exaggerate it.

Your goal is simple:

Extract power smoothly.
Stabilize control.
Avoid unnecessary strain.

Not chase numbers.

Who Is This Racket Really For?

The 100ZZ suits:

• Intermediate to advanced players

• Fast swing speed

• Backcourt attack-oriented style

• Players willing to handle head weight + stiff shaft + smaller sweet spot

If your swing is slow or inconsistent, this racket will feel demanding — and high tension will only make that worse.

Setup Option 1: Thin String for Explosive Attack

EXBOLT 63 / EXBOLT 65

Best for:

• Fast-swinging male players

• Smash-heavy attacking style

• Players who want sharp sound and fast shuttle speed

Yonex EXBOLT 63

• Approx. 0.63mm

• Sharper repulsion

• Louder impact sound

• More explosive feel

Yonex EXBOLT 65

• Slightly thicker

• Better durability

• Still crisp and responsive

Recommended tension: 24–26 lbs (adjust slightly based on strength)

Logic:
Let the head-heavy balance combine with thin-string repulsion to create continuous acceleration.
Do not push into extreme high tension — the frame is already stiff.

Setup Option 2: Rally Control & All-Round Play

VBS 66 Nano

Best for:

• Players who play longer rallies

• Balanced attackers

• Those who need stable drives, clears, and defense

Victor VBS-66 Nano

• 0.66mm gauge

• Elastic and lively response

• Balanced feel front and back court

Recommended tension: 23–26 lbs
If rallies are your focus, lean slightly lower for easier depth.

Key point:
Control comes from clean technique — not simply increasing tension.

Setup Option 3: Solid Feel & Durability

Kizuna Z69

Best for:

• High training volume players

• Those who prefer a solid, stable contact feel

• Players who don’t want frequent restringing

Kizuna Z69

• Thicker gauge

• Durable

• Deep, solid hitting sound

Paired with the 100ZZ, this creates a stable, training-focused setup.

Recommended tension: 24–27 lbs
Slightly higher is acceptable compared to thin strings — but avoid extremes.

Choosing Based on Player Type

Backcourt Power Player

Fast swing, sharp attack
→ EXBOLT 63 / 65
→ 24–26 lbs

Rally-Based All-Round Player

Wants rhythm, drive control, stable clears
→ VBS 66 Nano
→ 23–26 lbs

High-Volume Training Player

Needs durability and consistency
→ Kizuna Z69
→ Mid-to-upper moderate tension

Final Reminder

The ASTROX 100ZZ already provides:

• Head weight

• Shaft stiffness

• Structural power

You do not need to turn it into a board.

A properly strung 24–26 lbs with even tension and stable frame support will often feel better than chasing 28–30 lbs just for ego.

Power comes from:

• Swing speed

• Timing

• Elastic rebound

Not from pulling the number higher.

If your wrist or elbow starts complaining, the setup is wrong — not your strength.