At Tennis Warehouse, we use the Babolat Racquet Diagnostic Center (RDC) to measure racquet specifications. The RDC is the most sophisticated multi-task diagnostic equipment commercially available. These specifications (on strung racquets) and the resultant rating of maneuverability are included in our racquet descriptions and reviews.

Here's a brief explanation of each:

• Weight: racquet is measured strung. Weight offered in grams and ounces.
• Stiffness: frame stiffness measured at or about the throat area. This is generally recognized as the main flex point of a frame during ball contact. The higher the number, the stiffer the frame. The stiffer the frame, the more power it provides, all other things being equal. This is a relative number but generally, less than 55 is flexible, 55-60 is medium flexible, 60-65 is medium stiff, 65-70 is stiff and 70+ is very stiff.

  

• Inertia - also known as dynamic swingweight. This measurement quantifies how heavy a racquet feels in motion. The higher the number, the heavier the swingweight and less maneuverable the racquet. This can be a little confusing, though, because some lightweight, head-heavy racquets have similar (or higher) swingweights as heavy racquets. Keep in mind that weight and balance influence swingweight. A lower swingweight racquet is more maneuverable but provides less power if swung at the same speed.

  

• Maneuverability: Measured on a scale of 1-100, a higher score indicates a more maneuverable racquet. Calculated by combining Weight and Inertia (swingweight).