Butterfly Tenergy 80 vs Nittaku Hammond Z2: Which Should You Buy?

UltraSpin comparison · 2026-06-11 · rubber

Butterfly Tenergy 80

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Read the full Butterfly Tenergy 80 review →

Nittaku Hammond Z2

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Read the full Nittaku Hammond Z2 review →

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When the radar says tie but the rubber says otherwise

Six axes, six near-ties: speed is identical at 9.3, spin differs by just 0.1 (9.4 vs 9.3), control by 0.1 (9.0 vs 9.1), tackiness is tied at 2.1, and even throw and durability differ by less than a point (0.6 and 0.4 respectively). If you are choosing between Butterfly Tenergy 80 and Nittaku Hammond Z2 purely off the numbers, there is functionally no winner here - every one of those gaps is inside normal batch-to-batch and stroke-to-stroke variance. Anyone telling you one of these rubbers is measurably faster or spinnier than the other is reading more into a 0.1-point radar gap than the data supports.

So if the axis data does not separate them, what does? Sponge hardness. Tenergy 80 runs a soft 36-degree Spring Sponge; Hammond Z2 runs a firm 52-degree sponge - a 16-degree gap that dwarfs every radar delta above. That is not a rounding difference; it is a completely different mechanical relationship between your stroke and the ball.

The real fork: passive-friendly vs. active-only

This is where the pros and cons sections do the work the radar cannot. Tenergy 80’s whole selling point, per its own pros list, is forgiving blocking from a medium-low throw, where passive and active blocks both come easily. Hammond Z2’s cons list says almost the opposite in plain language: it demands active, well-timed strokes and is very unforgiving of passive contact. Those two sentences describe two different players. If your game leans on blocking, chopping the pace off incoming loops, or you are still building a fully committed stroke, Tenergy 80’s forgiveness is doing real work for you that Hammond Z2 will not.

If you are already an aggressive looper and counterlooper who commits fully to every stroke, Hammond Z2’s pros lean the other way: exceptional looping and counterlooping power, active blocks and smashes described as extremely dangerous, and excellent serve spin generation. It also carries one of the highest Revspin ratings in its category, per its own review consensus, and Reddit’s r/tabletennis threads on Japanese tensors back up its reputation as a distinctive, non-ESN alternative to the usual German sheets.

Durability, weight, and the migration question

Hammond Z2 edges out Tenergy 80 on durability (8.1 vs 7.7) and is rated above-average for durability compared to typical ESN tensors in its own pros list - a real, if modest, advantage for players who grind through rubber quickly. It is also 2 grams heavier uncut (70g vs 67g), which some players notice on the blade per its own cons list, though on a 5-ply OFF blade that is unlikely to be decisive on its own.

If you already play Tenergy 80 and are weighing a switch: you will not gain speed, and you will not gain meaningful spin or control on paper. What you would be trading is Tenergy 80’s blocking forgiveness for Hammond Z2’s flexibility across OFF-minus and more flexible blades, plus a slightly harder-hitting counterloop game if your strokes are already active and well-timed. For most players who already have Tenergy 80 working, that is not a compelling reason to switch. The better use of this comparison is for a player choosing their first Tenergy-tier rubber: pick Tenergy 80 if you block a lot or your technique is still developing, and Hammond Z2 if you are already an active, committed looper who wants a harder, more Japanese-tensor feel with slightly better durability. Racket Insight’s independent review of the Z2 reaches the same conclusion from the other direction, framing it as a rubber for players who have already outgrown forgiving sheets.