Butterfly Tenergy 19 vs Nittaku Fastarc G-1: Which Should You Buy?

UltraSpin comparison · 2026-06-10 · rubber

Butterfly Tenergy 19Nittaku Fastarc G-1
Our rating8.7/108.8/10
best_sideforehandboth
controlhigh — extended dwell time provides greater margin for error than other Tenergy variantsmedium-high
speed13215.0 (Nittaku)
spin11712.5 (Nittaku)
sponge_hardness36 degrees (approx 48 degrees ESN)47.5°
typeinverted / pimples-in tensortensor inverted
weight_uncut_gapprox 49 g69

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Tenergy 19 excels at spin with extended dwell and customizable thickness (1.7–2.1 mm), ideal for forehand loop-focused players. Nittaku Fastarc G-1 is a proven, hugely popular all-court attacking rubber for either wing, offering high throw, heavy spin, real speed together, and Tenergy-class durability at lower cost. G-1 has a firm 47.5-degree sponge that rewards committed, technically sound strokes and is noticeably heavier. Both are premium-tier; Tenergy 19 is slightly spinnier and more forgiving, while G-1 is more versatile and offers better value. G-1 suits intermediate-to-advanced all-court players; Tenergy 19 suits forehand spin specialists.

FAQ

Which is faster?

G-1 is rated 15.0 Nittaku scale vs. Tenergy 19’s 132. G-1 has real speed advantage.

Which is more versatile?

G-1 works on both wings for intermediate-to-advanced players. Tenergy 19 is forehand-optimized.

Which is heavier?

G-1 is on the heavier side (~69g uncut) vs. Tenergy 19’s ~49g. G-1 weight is noticeable for some players.

Who should pick Tenergy 19?

Intermediate-to-advanced forehand attackers prioritizing spin margin, wanting customizable thickness.

Who should pick G-1?

Intermediate-to-advanced all-court players wanting heavy spin, real speed, high throw angle, and Tenergy-class durability at lower cost.