Butterfly Sriver FX vs Yasaka Rakza 7: Which Should You Buy?

UltraSpin comparison · 2026-06-07 · rubber

Butterfly Sriver FXYasaka Rakza 7
Our rating7.8/108.6/10
best_sidebothboth
controlhighhigh
speedmediumoffensive
spinmedium-highhigh
sponge_hardnesssoft45–47°
typehigh-tension inverted (soft)tensor inverted
weight_uncut_g6270

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Both rubbers rate highly for control, but the Rakza 7 layers serious spin on top. The Sriver FX is a soft, forgiving classic that is hard to beat for blocking, chopping and steady touch at a low price. The Rakza 7 brings huge grip from its natural-rubber topsheet, spin reviewers place close to Tenergy 05, and strong short-game control with no runaway catapult.

If you want the softest, most forgiving feel and a control or defensive game, stay with the Sriver FX. If you want to attack with heavy spin while keeping excellent control, the Rakza 7 is the upgrade, and it is one of the most recommended backhand rubbers at club level.

The Rakza 7 only asks that you supply pace, since its speed is moderate at around 80 percent of top rubbers, and it comes in 1.8, 2.0 and max to tune speed against control. It is a great first step up from entry rubbers without overwhelming you.

FAQ

Which has more spin?

The Rakza 7. Its natural-rubber topsheet grips hard and reviewers rate its spin close to Tenergy 05, well above the medium-high spin of the older Sriver FX.

Is the Rakza 7 hard to control?

No. It is praised for outstanding control and consistency, especially in the short game, blocks and pushes, with none of the runaway catapult some tensors show on touch.

Which is the better backhand rubber?

The Rakza 7 is one of the most recommended backhand rubbers at club level. The Sriver FX is fine for backhand control but offers less spin and pace.