A Wilson RF 01 300 Extended
We want to share the specifications of an extended (70.0mm/27.559) Wilson RF 01 300.
The lengthening process involves removing the staples holding the butt on, which needs to be done carefully for the integrity of the foam pallet, before proceeding with the next steps.
Any time the butt cap comes off a racquet, the first step is to fill the open shaft with a stopper, preferably cotton, to the desired depth for fitting or protection. If the racquet is “foamed” some of it is removed.
Numerous small details go into the extension we design and print, so we will not go into all of those right now.
The area that will accept the extension is filled with a new two (2) part epoxy made by Starbond. This epoxy is nearly fully cured after several minutes; however, we prefer to let it cure overnight before proceeding with any other work.
After the curing cycle, the butt cap is installed. We do not use staples in most cases, only a chemical adhesive. Staples can easily damage the original foam pallet and the extension if the location is not ideal.
If you make it to the end of this data table, you will find some comparison data. This data is a glance at what has changed from the original 27-inch length. This is a specific racquet, so your specifications, if extended, may differ.
This is enough small talk, so let’s take a look at the results of the extension.
| Manufacturer | Wilson |
|---|---|
| Racquet Model | RF 01 300 Long |
| Reference Tension | 56 |
| String | Wilson Duramax NXT |
| Machine Used | Baiardo |
| String Bed Stiffness - RDC | 47 |
| String Bed Stiffness -FlexFour | 57 |
| Strig Bed Stiffness - SBS | 50.4 |
| String Bed Stiffness - ERT | 32 |
| Racquet Flex, RDC | 62 |
| Racquet Flex, FlexFour | 50.4 |
| Racquet - In Plane Stiffness | 450.6 |
| Weight, Grams | 355 |
| Weight, Ounces | 12.52 |
| Balance, mm | 314 |
| Balance, Inch | 12.36 |
| Length, Cm | 70 |
| Length, Inch | 27.559 |
| Head Width | 9.70 |
| Head Length | 12.80 |
| Head Area, cm2 | 629.1 |
| Head Area, Sq. Inch | 97.5 |
| Beam Height @ Grip, mm | 23 |
| Beam Height @ Mid, mm | 23 |
| Beam Height @ Tip, mm | 23 |
| Beam Width @ Grip, mm | 11.5 |
| Beam Width @ Throat, mm | 12 |
| Beam Width @ Mid, mm | 12 |
| Beam Width @ Tip, mm | 12 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio | .639 |
| Main String Grid Inch/mm | 7.42/188.5 |
| Cross String Grid Inch/mm | 10.56/268.2 |
| Density (% of head filled with string) | .804 |
| Average Cross String Space | .556 |
| Average Main String Space | .464 |
| Dynamic Tension, Kp, ERT | 32 |
| Dynamic Tension, Lbs/in | 178.9 |
| First Moment, Nm | .850 |
| Polar Moment | 356 |
| Torsional Stability | 17 |
| Swing Weight, Kg/cm^2 | 339 |
| Swing Weight, Ounces | 11.96 |
| Swing Weight Calculated | 350.0 |
| Power, RDC | 55 |
| Control, RDC | 41 |
| Manueverability, RDC | 61 |
| Power, Calculated | 2151.9 |
| Head Points | 11.34 |
| Head Weight, % | 44.9 |
| Center of Percussion | 21.5 |
| Dwell Time, ms | 6.83 |
| Efective Stiffness - lbs | 26.7 |
| K, Lb/In | 150.6 |
| Recoil Weight | 178.85 |
| Twist Weight | 250.25 |
| End Weight | 153.9 |
| Tip Weight | 200.4 |
| 9 O'Clock | 95.7 |
| 3 O'Clock | 94.4 |
| Butt End | 163.6 |
| COF, Main | .304 |
| COF, Cross | .386 |
| Property | Original | Extended | Change % |
|---|---|---|---|
| Overall Weight | 319 | 355 | 10.1 |
| Swing Weight | 310 | 339 | 8.5 |
| Length | 27.0 | 27.55 | 2.0 |
| Power Calculaton | 1892.8 | 2151.9 | 12.0 |
| Recoil Weight | 149.4 | 178.8 | 16.4 |
| Twist Weight | 224.87 | 250.2 | 10.1 |
Posted on December 7, 2025 Sun, in Custom Racquets, Customization!, Dwell Time, Extended, Weight, Wilson. Bookmark the permalink. Leave a comment.
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