Butterfly Dignics 64 vs Nittaku Fastarc S-1: Which Should You Buy?

UltraSpin comparison · 2026-06-12 · rubber

Butterfly Dignics 64Nittaku Fastarc S-1
Our rating8.8/107.9/10
best_sidebackhandforehand or backhand
control8.570
speed9.597
spin8.596
sponge_hardness40 degrees (Shore A) / 50 degrees (EUR)35 degrees
typeinvertedinverted
weight_uncut_g47around 41-43g

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Dignics 64 and Nittaku Fastarc S-1 both appeal to intermediate-advanced players but diverge sharply. Dignics 64 is a backhand-optimized spin-insensitive tensor, delivering consistent blocking and flat-attack speed with reliable performance and superior durability. Fastarc S-1 is one of the lightest tensors available (under 43g), offering genuine speed without stiffness, accessible all-round play, and excellent value against premium rubbers. S-1 suits players transitioning from beginner rubbers, seeking lightweight versatility on either wing; Dignics 64 suits advanced backhand-focused players needing spin tolerance and counter-attack consistency. Both are intermediate-to-advanced tier, but S-1 bridges lower skill floors with lighter construction, while Dignics 64 is pure advanced backhand specialization.

FAQ

Which is lighter?

S-1 at around 41-43g is significantly lighter than Dignics 64 at 47g.

Which is better for all-round play?

S-1 works naturally on forehand and backhand. Dignics 64 is backhand-specialized and less all-round.

Which suits beginners upgrading?

S-1 is more forgiving for intermediate players bridging beginner rubbers. Dignics 64 is advanced-tier.

Spin generation?

Dignics 64 rates 8.5 spin; S-1 rates 96 and is notably lower. Dignics generates more spin.

Can S-1 handle backhand attacks?

Yes, S-1 is lightweight enough for backhand attacks. Dignics 64 is still better optimized for backhand play.