Butterfly Tenergy 05 FX vs Nittaku Fastarc G-1: Which Should You Buy?

UltraSpin comparison · 2026-06-11 · rubber

Butterfly Tenergy 05 FXNittaku Fastarc G-1
Our rating8.4/108.8/10
best_sidebackhandboth
control10medium-high
speed1315.0 (Nittaku)
spin11.512.5 (Nittaku)
sponge_hardness36 degrees (soft)47.5°
typeInverted / High-Tension tensor (Spring Sponge)tensor inverted
weight_uncut_g6469

We may earn a commission from links on this page. Learn more.

Tenergy 05 FX is a premium soft tensor perfect for backhand play and dwell-time touch. Its 36-degree sponge makes opening backspin easy and forgiving, ideal for advanced club players building spin-first games on the backhand wing.

Nittaku Fastarc G-1 delivers heavy spin, real speed together with a safe, high throw making opening loops consistent and forgiving. Its 47.5-degree sponge rewards committed, technically sound strokes. Tenergy-like durability means performance drops very slowly over months of use. It is a proven all-court attacking rubber for either wing, delivering Tenergy-class performance at lower cost. Heavier than some prefer, best suited to intermediate-to-advanced attackers who want both wings and strong durability without premium Tenergy pricing.

FAQ

How much faster is G-1?

Fastarc G-1 rates 15.0 (Nittaku scale) versus 05 FX at 13. A noticeable speed gap.

Which is softer?

05 FX at 36 degrees is much softer than G-1 at 47.5 degrees. Feel is very different.

Can both work on backhand?

05 FX is ideal for backhand; G-1 works both wings but is best suited to forehand attack.

Is G-1 worth less than 05 FX?

Yes, G-1 is cheaper and offers strong value with comparable durability and broad versatility.

Which suits mid-distance play?

Both excel. 05 FX favours close range with dwell; G-1 is stronger at mid to long range.