Butterfly Sriver FX vs Loki RXTON 1: Which Should You Buy?

UltraSpin comparison · 2026-06-07 · rubber

Butterfly Sriver FXLoki RXTON 1
Our rating7.8/108.0/10
best_sidebothboth
controlhighvery high
speedmediumlow to medium
spinmedium-highhigh
sponge_hardnesssoftmedium (around 38-39 degrees Chinese scale, roughly 50-52 ESN)
typehigh-tension inverted (soft)tacky inverted (budget)
weight_uncut_g6264

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Both rubbers put control first, so the decision is mostly about price and feel. The Sriver FX is a soft, forgiving classic with outstanding control, excellent for blocking, chopping and steady all-round play, and durable value at roughly 30 to 40 dollars. The RXTON 1 pushes control even higher and costs around 15 dollars, with usable spin for serves and rallies, a higher-quality top sheet than most budget rivals, and a light, easy feel ideal for beginners.

Neither is a power rubber. The Sriver FX feels slow and tame unglued and lacks modern catapult and throw, while the RXTON 1 has low outright speed and only mild tackiness that wears off over time. The RXTON 1 is treated mainly as a beginner or control option rather than a competitive sheet.

Go with the RXTON 1 if you want the cheapest, easiest entry point or a training rubber you can swap monthly. Go with the Sriver FX if you want a refined, durable Butterfly control classic and are willing to pay more for that pedigree and feel.

FAQ

Which is cheaper?

The RXTON 1 at around 15 dollars, versus roughly 30 to 40 dollars for the Sriver FX, so the Loki is the clear budget option.

Which has more control?

Both are control-first, but the RXTON 1 is rated very high for control, making the table easy to hit, while the Sriver FX is a soft, high-control classic.

Are either of these fast?

No. The Sriver FX feels slow unglued and lacks modern catapult, and the RXTON 1 has low outright speed and is not a power rubber.

Which is the better beginner rubber?

Both suit beginners, but the RXTON 1 is light, easy to handle and so cheap you can replace it monthly, making it ideal for a first inexpensive custom racket.