The tennis string guide.

Gauge describes the thickness of the string. A lower gauge number means a thicker string, while a higher number means a thinner string.

Common tennis strings generally fall between 15 and 18 gauge, with 16 and 17 gauge among the most common choices.

Thicker strings generally provide greater durability and can be a good choice for players who frequently break strings.

Thinner strings can provide more feel, responsiveness, and spin potential because the strings can move and interact with the ball more easily. The tradeoff is reduced durability.

For many players, 16 or 17 gauge provides a good starting point before adjusting based on feel, performance, and how frequently strings break.

String tension describes how tightly the strings are installed in the racket and is usually measured in pounds.

Every racket has a manufacturer-recommended tension range, which provides a useful starting point when choosing your setup.

Lower tension generally creates a softer, more powerful string bed and can provide greater comfort and easier depth.

Higher tension generally creates a firmer, lower-powered response that some players find more predictable or controlled.

Small tension changes can noticeably affect how a racket feels. If you're unsure where to start, the middle of your racket's recommended tension range is usually a sensible baseline.

From there, tension can be adjusted depending on what you're looking for: slightly lower for more comfort and easy power, or slightly higher for a firmer, more controlled response.

Strings can change the performance of a racket just as meaningfully as many racket specifications.

Players looking for more power generally benefit from softer, more elastic strings and moderately lower tensions.

Players looking for more control often gravitate toward polyester strings, firmer setups, or higher tensions.

Players looking for more spin often benefit from polyester strings that allow the strings to slide and snap back during contact. Thinner gauges and certain string shapes can also influence spin potential.

There is no single "best" setup. The goal is to find a combination that complements both your racket and the way you swing.

Comfort and durability often involve a tradeoff when choosing strings.

Softer strings such as multifilament and natural gut generally provide greater comfort and can be particularly useful for players concerned about arm, wrist, or elbow discomfort.

Polyester generally provides greater resistance to breaking and excellent control, but it is also firmer and can lose its playing characteristics well before the string actually breaks.

This means a string doesn't have to break to need replacing. A setup that has lost significant tension, feels unusually stiff or unresponsive, or no longer provides predictable control may be ready for restringing.

Strings gradually lose tension and performance every time you play, even if they don't break.

There isn't one restringing schedule that works for everyone. How often you should restring depends on how frequently you play, your string type, how hard you hit, and the performance you expect from your equipment.

Occasional recreational players may go several months between string jobs, while frequent players—particularly those using polyester—may restring much more often.

Rather than waiting only for a string to break, pay attention to how the racket plays. Noticeable loss of control, reduced responsiveness, excessive string movement, or a significant change in feel can all indicate that it's time for fresh strings.

For newer players, the most important thing is simple: you don't need to overthink your first string setup. Start with a comfortable, versatile string at a moderate tension and adjust as you learn what you prefer.