The United States Racquet Stringers Association explains the lab test procedure as follows: All strings were tensioned to 62 pounds and allowed to sit for 200 seconds. Then the string was hit five times with a force equivalent to hitting a 120 mph serve. The tension loss represents the total amount of the relaxation over both time and impact. The stiffness value is a calculation derived from the amount of force created at impact to stretch the string. Lower values represent softer strings and lower impact forces. Higher values represent stiffer strings and higher impact forces.
STRING NAME
GAUGE
TOTAL TENSION LOSS LBS
STIFFNESS
Durafluxx 128
16 (1.28mm)
16.87
244
Durafluxx 123
17 (1.23mm)
15.67
231
Durafluxx 118
18 (1.18mm)
20.27
196
Ghost Wire 127
16 (1.27mm)
16.27
188
Ghost Wire 122
17 (1.22mm)
14.77
181
Ghost Wire 117
18 (1.17mm)
18.69
167
Ghost Wire 110
19 (1.10mm)
23.77
146
Strike Force RIP 128
16 (1.28mm)
20.49
199
Strike Force RIP 123
17 (1.23mm)
21.94
183
Strike Force RIP 118
18 (1.18mm)
19.31
171
Firewire 130
16 (1.30mm)
14.18
236
Firewire 125
17 (1.25mm)
13.85
221
Firewire 120
18 (1.20mm)
15.41
195
Black Knight 128
16 (1.28mm)
14.95
203
Black Knight 123
17 (1.23mm)
15.39
197
Black Knight 118
18 (1.18mm)
17.84
173
Tour Status 130
16 (1.30mm)
14.66
217
Tour Status 125
17 (1.25mm)
16.49
206
Tour Status 120
18 (1.20mm)
15.86
203
Atomos 130
16 (1.30mm)
19.93
320
Atomos 125
17 (1.25mm)
18.88
309
Atomos 120
18 (1.20mm)
19.65
297
Triumph 130
16 (1.30mm)
12.13
174
Triumph 125
17 (1.25mm)
12.35
146
String Comparison
STRING NAME
Diameter
TOTAL TENSION LOSS LBS
STIFFNESS
Babolat RPM Blast
1.25mm
17.13
273
Luxilon Alu Power
1.25mm
17.13
242
Head Lynx Edge
1.25mm
21.59
181
Head Hawk Touch
1.25mm
14.97
287
Yonex PolyTour Spin
1.25mm
15.41
212
Yonex PolyTour Rev
1.25mm
17.33
279
Tecnifibre Black Code
1.27mm
18.03
225
Luxilon 4g
1.24mm
13.3
249
Diadem Solstice Black
1.25mm
21.10
262
Solinco Confidential
1.25mm
14.95
285
Solinco Hyper G
1.25mm
15.56
290
Mayami Big Spin
1.25mm
17.18
247
Mayami Hepta Power
1.24mm
14.53
268
Tourna Big Hitter Silver
1.25mm
13.41
198
Ytex Hexagon X
1.25mm
13.12
303
Ytex PolySpin
1.27mm
18.99
284
String Performance Guide
OUR FULL STRING LINEUP — HOW THEY COMPARE
The comparable strings listed below are based on extensive research across the tennis community, including player discussions on Talk Tennis forums, independent string reviews on tennis blogs, and official customer reviews. These comparisons reflect real-world player feedback — not manufacturer claims.
The comparable strings listed below are based on extensive research across the tennis community, including player discussions on Talk Tennis forums, independent string reviews on tennis blogs, and official customer reviews. These comparisons reflect real-world player feedback - not manufacturer claims.
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