Butterfly Tenergy 64 vs Yasaka Rakza 7 Soft: Which Should You Buy?

UltraSpin comparison · 2026-06-12 · rubber

Butterfly Tenergy 64Yasaka Rakza 7 Soft
Our rating8.6/108.2/10
best_sideboth wings, but especially the backhand and for speed-first attackersbackhand or both
controlmedium-high9+ (Yasaka scale)
speedvery high11 (Yasaka scale)
spinhigh but the lowest of the Tenergy line14+ (Yasaka scale)
sponge_hardnessapproximately 36 degrees on the Butterfly scale (around 48 degrees ESN, plays nearer 45)40 degrees (37-42 ESN range)
typespring sponge high tension tensor, inverted topsheettensor/inverted
weight_uncut_gapproximately 70 (around 47 g cut at 2.1 mm)approximately 42-44g

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Tenergy 64 (8.6) is the fastest Tenergy with spin-insensitive design and fantastic block feel. Outstanding backhand rubber, light weight, proven build. However, modest short game, premium price, and spin rated lower than most tensors.

Rakza 7 Soft (8.2) prioritizes exceptional control and high spin with easy brush activation. Soft sponge works beautifully with new poly balls; high throw angle clears net generously; excellent short game. Performs reliably on both wings; great value relative to premium tensors.

Tenergy 64 suits speed-first attackers and blockers seeking spin-insensitive play. Rakza 7 Soft suits intermediate and developing loopers valuing control.

FAQ

Which is better on backhand?

Tenergy 64 is outstanding backhand rubber. Rakza 7 Soft performs reliably on both wings.

Which has better short game?

Rakza 7 Soft excels: excellent serves, receive, and flicks. Tenergy 64 has modest short game.

Which is more forgiving?

Rakza 7 Soft’s soft sponge and high throw angle provide generous safety margin. Tenergy 64 prioritizes speed.

How do speeds compare?

Tenergy 64 is very high speed (highest rating). Rakza 7 Soft achieves 11 Yasaka scale (roughly 88 normalized).

Which is better value?

Rakza 7 Soft is great value relative to premium tensors. Tenergy 64 is premium-priced.