Tennis Strings Explained (Without the Jargon)

Why strings matter more than you'd think

The string bed is the only part of the racquet that touches the ball. Its material and tension shape power, spin, control and comfort more than almost anything else you can tweak — and swapping strings is the cheapest way to meaningfully change how a racquet plays.

The four families of string

Almost every string on the shelf falls into one of four types, from most comfortable to most demanding:

• Natural gut — the gold standard for feel, power and comfort, and the kindest to your arm. Expensive and sensitive to damp weather.
• Multifilament — soft, powerful and arm-friendly; it mimics gut at a lower price. The go-to for comfort seekers.
• Synthetic gut — the cheap, dependable all-rounder. A great default for beginners and recreational players.
• Polyester ('poly' or co-poly) — control, spin and durability for players with big, fast swings. Stiff and hard on the arm — the main tennis-elbow culprit, so approach with caution.

Gauge = string thickness

Gauge is just how thick the string is, and the numbers run backwards: a higher number is thinner. Thinner strings (17 or 18) grip the ball for more spin and feel but break sooner; thicker strings (15 or 16) last longer and offer a touch more control. If you're unsure, 16 gauge is a sensible default.

Tension: the big dial

Every frame lists a recommended tension range. Lower tension gives you more power and comfort (and a little more spin from the trampoline effect); higher tension gives more control and a crisper feel. Start in the middle of the range and adjust from there.

Two things to know: string 'dies' — it loses tension and liveliness over a few weeks even if it never breaks — and if your arm complains, dropping a few pounds of tension is one of the first things to try.

Hybrids: the best of both

A hybrid uses two different strings — most commonly polyester in the mains (the up-and-down strings, for spin and control) and gut or multifilament in the crosses (for comfort). It's the famous Federer-style setup, and a smart middle ground between a harsh full-poly bed and a soft full-multi one.

Because the mains do roughly 70% of the work you feel, this gets you most of poly's control with much of a soft string's comfort. Stringing the crosses a few pounds looser is common.

The arm-health rule

If you have any hint of tennis elbow — or want to avoid it — this is the most important line in the guide: choose a multifilament or natural gut over a full bed of stiff polyester, and string toward the lower end of the range. This single choice matters more for your arm than the racquet itself.

How often should you restring?

The old rule of thumb: restring per year as many times as you play per week. Play three times a week, aim for roughly three restrings a year — more if you break strings or chase peak feel. Dead strings quietly sabotage your consistency long before they snap, so don't wait for a break to change them.

Quick picks by player type

• Beginner or recreational player: synthetic gut or a soft multifilament, mid-range tension.
• Spin and power seeker with a full, fast swing: a co-poly, or a poly hybrid for a little more comfort.
• Anyone with arm niggles: multifilament or natural gut, strung on the lower side.