Butterfly Dignics 05 vs Nittaku Fastarc S-1: Which Should You Buy?

UltraSpin comparison · 2026-06-12 · rubber

Butterfly Dignics 05Nittaku Fastarc S-1
Our rating9.0/107.9/10
best_sidebothforehand or backhand
controlmedium-high70
speedhigh (Butterfly rating 86)97
spinvery high (Butterfly rating 85)96
sponge_hardness40 degrees (Butterfly scale)35 degrees
typetensor inverted (Spring Sponge X)inverted
weight_uncut_g70around 41-43g

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Butterfly Dignics 05 is a class-leading premium tensor delivering violently dipping topspin, immense power, and outstanding durability. Its 40-degree firm sponge enables complete play with excellent blocking and short-game control, positioning it as the choice for advanced attackers with developed technique.

Nittaku Fastarc S-1 is a lightweight, accessible tensor offering genuine speed without excessive stiffness, very lightweight at under 43g uncut, with excellent blocking stability and grippy non-tacky topsheet. Spin output is noticeably lower than premium rivals, and counter-topspin against heavy spin feels limited, making it less suited to spin-dominant players. Both are solid, but they target different players: Dignics 05 for tournament-level attackers maximizing power and durability, S-1 for developing and intermediate players seeking control alongside genuine pace. Choose Dignics 05 if performance at any cost matters; choose S-1 if you value accessibility, light weight, and strong fundamentals over extreme speed.

FAQ

Which is significantly lighter?

Fastarc S-1 at under 43g uncut is dramatically lighter than Dignics 05 at 70g, making swinging easier.

Which generates more spin?

Dignics 05 by a clear margin; Fastarc S-1 spin is noticeably lower than top tensor rivals.

Which suits intermediates?

Fastarc S-1 is explicitly designed for intermediate players and those transitioning from beginner rubbers; Dignics 05 requires advanced technique.

Which has better blocking stability?

Both excel; Fastarc S-1 is noted for excellent stability, while Dignics 05 is superb due to its firm sponge.

Which is more forgiving?

Fastarc S-1 is more forgiving overall due to its lighter feel; Dignics 05 demands power and clean technique.