String & Racket Finder
Isospeed tennis strings compared
Every Isospeed string bed on the bench — 27 setups rated across eight axes, including arm friendliness, which is the axis most string charts leave out.
How the range scores
Across these 27 beds the range averages 7.9 for spin and 6.9 for arm friendliness. Its strongest axes are spin (7.9) and power (7.5); its weakest is sound (6.1). That makes it middling on arm friendliness — neither a comfort range nor a punishing one. 16 of the 27 are named hybrids rather than full beds. Gauges represented: 1.20 · 1.25 · 1.30 mm.
Compare these strings in the finder →Ratings
Each row is a string bed rather than a reel: a full bed of one string, or a named hybrid. Axes are spin, power, control (flat), precision, feel, sound, longevity, arm friendliness, each rated 0–10.
| String | Setup | Spin | Pwr | Ctrl | Prec | Feel | Snd | Life | Arm |
|---|---|---|---|---|---|---|---|---|---|
| ISOSPEED Baseline Control 1.30 | full bed | 7 | 7 | 8 | 8 | 5 | 6 | 9 | 5 |
| ISOSPEED Baseline Speed 1.25 | full bed | 8 | 6 | 8 | 8 | 6 | 6 | 8 | 6 |
| ISOSPEED Baseline Spin 1.20 | full bed | 9 | 6 | 9 | 8 | 6 | 7 | 8 | 5 |
| ISOSPEED Professional Classic 1.20 | full bed | 9 | 8 | 7 | 7 | 8 | 6 | 6 | 8 |
| ISOSPEED Professional 1.20 | full bed | 9 | 8 | 6 | 7 | 8 | 6 | 6 | 8 |
| ISOSPEED Control Classic 1.30 | full bed | 7 | 7 | 8 | 8 | 5 | 6 | 8 | 5 |
| ISOSPEED Energetic 1.30 | full bed | 4 | 9 | 4 | 5 | 9 | 6 | 6 | 9 |
| ISOSPEED Pyramid 1.30 | full bed | 8 | 7 | 8 | 8 | 5 | 7 | 7 | 5 |
| ISOSPEED Black Fire 1.25 | full bed | 8 | 6 | 8 | 8 | 5 | 6 | 7 | 5 |
| ISOSPEED Grey Fire 1.25 | full bed | 8 | 7 | 7 | 8 | 6 | 6 | 7 | 7 |
| ISOSPEED AXON Multi 1.25 | full bed | 5 | 9 | 3 | 4 | 9 | 6 | 5 | 9 |
| ISOSPEED Baseline Spin 1.20 | TOROLINE Wasabi X 1.20 | 9 | 6 | 9 | 8 | 7 | 6 | 7 | 6 |
| ISOSPEED Baseline Spin 1.20 | WILSON NXT Control 1.30 | 8 | 8 | 8 | 7 | 8 | 6 | 7 | 7 |
| ISOSPEED Professional Classic 1.20 | BABOLAT Addiction 1.30 | 8 | 9 | 6 | 6 | 9 | 6 | 6 | 9 |
| ISOSPEED Professional Classic 1.20 | BABOLAT Touch Tonic 1.30 | 8 | 9 | 6 | 6 | 9 | 7 | 7 | 9 |
| ISOSPEED Professional Classic 1.20 | GAMMA TNT2 1.27 | 8 | 9 | 6 | 6 | 9 | 5 | 6 | 9 |
| ISOSPEED Professional 1.20 | BABOLAT Xcel 1.30 | 8 | 9 | 5 | 6 | 9 | 6 | 6 | 9 |
| ISOSPEED Baseline Control 1.30 | ISOSPEED Professional Classic 1.20 | 8 | 8 | 8 | 8 | 7 | 6 | 8 | 7 |
| ISOSPEED Baseline Spin 1.20 | LUXILON Element 1.25 | 9 | 7 | 8 | 8 | 7 | 6 | 8 | 7 |
| ISOSPEED Baseline Spin 1.20 | LUXILON Natural Gut 1.30 | 8 | 8 | 7 | 7 | 8 | 7 | 8 | 7 |
| ISOSPEED Baseline Control 1.30 | ISOSPEED Baseline Speed 1.25 | 7 | 7 | 8 | 8 | 6 | 6 | 9 | 6 |
| ISOSPEED Baseline Spin 1.20 | RESTRING Zero | 9 | 7 | 8 | 8 | 7 | 6 | 8 | 6 |
| ISOSPEED Baseline Control 1.30 | WILSON Revolve Spin | 8 | 7 | 8 | 8 | 6 | 6 | 8 | 6 |
| ISOSPEED Baseline Speed 1.25 | LUXILON Element 1.25 | 8 | 7 | 7 | 8 | 7 | 6 | 8 | 7 |
| ISOSPEED Baseline Speed 1.25 | BABOLAT RPM Soft 1.25 | 8 | 7 | 8 | 8 | 6 | 6 | 8 | 7 |
| ISOSPEED Control Classic 1.30 | TOROLINE O-Toro | 8 | 7 | 8 | 8 | 7 | 6 | 8 | 6 |
| ISOSPEED Control Classic 1.30 | TIER ONE Tour Status 1.25 | 8 | 7 | 8 | 8 | 5 | 7 | 8 | 5 |
Swipe the table sideways for the remaining columns.
Matching a string to your racket
A string only makes sense in a frame. A stiff polyester in an already stiff, powerful racket is the most common cause of arm trouble in club tennis, and the same string in a flexible control frame can be excellent. The finder scores the pairing rather than the string alone.