Tennis Racquet String Patterns Explained
16x18, 18x20, 16x19 ... what does that all mean?
We explain those numbers and how they can affect performance.
String Pattern Numbers
First things first, let's explain what those numbers mean. If you take a 16x18 racquet, for example, the number 16 refers to the number of main strings in the racquet. The main strings, or mains, are those that run vertically from the throat to the tip of the frame. The number of main strings is always listed first. The number 18 refers to the number of cross strings. The crosses, as they are often called, run horizontally across the racquet. The number of mains and crosses in your racquet affects performance.
Open String Patterns
The most common open string pattern racquets are 16x18 and 16x19. These are called open string patterns because the squares are larger, or another way to look at it is the string spacing is larger. The advantages of open string patterns are that is is easier to hit with depth, power and spin. A good comparison likens an open string pattern to an off-road tire. The open string pattern will dig in, grab the ball and send it out with a good amount of spin.
Dense String Patterns
For denser string patterns, the most common you'll find is 18x20. If you compare a racquet with 18 mains with one that has the same head size but only 16 mains, you'll notice that the holes are smaller. This tighter string spacing creates a denser pattern. These dense string patterns are great for players who hit flatter shots and don't use spin to control their shots. This pattern will help get the ball to drop inside the lines, while still allowing players to hit through the ball. That being said, dense string patterns can be great for hitting slice shots. Futher, because spin is heavily dependent on mechanics and swing speeds, some players will find denser string patterns plenty spin friendly
String Patterns Compared
| Open pattern (16x18 or 16x19) | Dense pattern (18x20) |
| Livelier (more power) | More control |
|
Easier access to spin |
More precise |
| Forgiving feel | Firmer feel |
| Higher launch angle (loopier shots) | Lower shot trajectory |
In-between Patterns
Although 16x18, 16x19 and 18x20 are the most common string patterns, there are some in-between patterns. You'll see racquets with a 16x20 or 18x19 pattern. The goal of these in between patterns is to give you a blend of the performance aspects of open and dense stringbeds.