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

UltraSpin comparison · 2026-06-12 · rubber

Butterfly Tenergy 19Nittaku Fastarc S-1
Our rating8.7/107.9/10
best_sideforehandforehand or backhand
controlhigh — extended dwell time provides greater margin for error than other Tenergy variants70
speed13297
spin11796
sponge_hardness36 degrees (approx 48 degrees ESN)35 degrees
typeinverted / pimples-in tensorinverted
weight_uncut_gapprox 49 garound 41-43g

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Tenergy 19 (8.7) dominates spin generation through thinner pimples and extended dwell time, providing substantial margin for error. Medium-high throw keeps loops safely on table. Its premium price reflects elite-level spin potential and forgiving contact.

Fastarc S-1 (7.9) prioritizes lightweight speed (typically under 43g uncut) with genuine tensor speed and excellent blocking. Its grippy non-tacky topsheet offers pleasing tactile feedback and good medium-high throw angle. However, spin output noticeably lags Fastarc G-1 and top tensor rivals. Highly accessible for developing players.

For maximum spin and complete forgiveness: Tenergy 19. For lightweight, forgiving, speed-oriented tensors with good control: Fastarc S-1 excels.

FAQ

How much lighter is Fastarc S-1?

Fastarc S-1 is typically under 43g uncut. Tenergy 19 is approximately 49g uncut, so notably lighter.

Why does Fastarc S-1 have lower spin than G-1?

Construction differences between variants result in lower spin output, sacrificing spin for speed and control.

Which is better for beginners?

Fastarc S-1 is more accessible for developing players. Tenergy 19 is premium-tier and demands confident technique.

Can Fastarc S-1 work on carbon blades?

Yes, it suits both carbon and all-wood offensive blades. Tenergy 19 performs best on carbon or ALC blades.

Which has better value?

Fastarc S-1 offers strong value versus premium tensors. Tenergy 19 is very expensive but justifies it with spin ceiling.