| Spec | Head Extreme Tour | Wilson Shift 99 Pro |
|---|---|---|
| Weight (unstrung) | 305g | 320g |
| Head Size | 98 sq in | 99 sq in |
| Balance | Head Light | Head Light |
| String Pattern | 18x20 | 16x19 |
| Swingweight | 328 | 343 |
| RA Stiffness | 73 | 72 |
| Strung Weight | 330g | 345g |
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