Butterfly Tenergy 05 Hard vs Yasaka Rakza Z: Which Should You Buy?

UltraSpin comparison · 2026-06-11 · rubber

Butterfly Tenergy 05 HardYasaka Rakza Z
Our rating8.5/108.6/10
best_sideforehandforehand
control5.5high
speed13.0medium
spin11.5extreme
sponge_hardness43 degrees (hard)50 degrees (medium-hard; Extra Hard version around 57 degrees)
typetensorhybrid tacky tensor
weight_uncut_g7172

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Butterfly Tenergy 05 Hard delivers speed-first precision (13.0 speed, low throw) for aggressive attackers. Yasaka Rakza Z (8.6 rating) excels at extreme spin and heavy tacky control, particularly on serves, backspin openings and forehand loops. Rakza Z is described as having exceptional, low-slip spin—matching Tenergy’s spin output (11.5) but with a tacky topsheet feel.

The key trade: Tenergy 05 Hard is lighter, more versatile and more durable. Rakza Z is heavier (72 grams) and can cause arm or wrist fatigue on carbon blades. Rakza Z’s high throw angle requires a more closed blade angle; it weakens at less than full power or out of position. Both suit forehand, but Tenergy’s low-arc geometry contrasts with Rakza Z’s strong, linear kick on full strokes.

Choose Tenergy 05 Hard for speed-based power attacking with minimal fatigue. Choose Rakza Z if you love heavy spin, do not mind commitment to full strokes, and are willing to accept lower speed and more weight in exchange for tacky grip and heavy topspin pressure.

FAQ

Which produces more spin?

Both rate similarly—Tenergy 11.5 versus Rakza Z extreme. Tenergy emphasizes flat-hit speed over spin; Rakza Z maximizes spin on loops, backspin openings and serves.

Why is Rakza Z so heavy?

Rakza Z is a hybrid tacky tensor at 72 grams uncut. The tacky topsheet and thick sponge add weight; this can cause arm fatigue, especially on carbon blades.

Is Rakza Z weaker for passive shots?

Yes—Rakza Z is weak and slow at less than full power or when out of position. It requires committed full strokes to excel, unlike Tenergy which performs across power levels.

Which is better for blocking?

Tenergy 05 Hard blocks better—it is spin-insensitive and reliable. Rakza Z has surprisingly high control but is not optimized for passive play.

Which lasts longer?

Tenergy 05 Hard offers better long-term performance. Rakza Z is described as durable but the tacky topsheet requires more maintenance and care.