The Complete Guide to Tennis Gear: Rackets, Strings, and More (2025)

Tennis equipment is genuinely confusing. Racket manufacturers use vague marketing language alongside real technical specs, and the relationship between specs and on-court feel isn't always intuitive. This guide cuts through the noise: here's how rackets, strings, and accessories actually work, what specs matter, and how to build a complete setup that works for your game.

Part 1: Understanding Rackets

Head Size

The head size (measured in square inches) is the most visible spec on any racket. It determines two things: the size of the sweet spot, and the power potential of the frame.

• 95 sq in and under: Tour-level precision frames for expert players only. Tiny sweet spot, maximum control.
• 97–98 sq in: The sweet spot for advanced players. Used by most professionals. Small enough for precise control, large enough to be manageable.
• 100 sq in: The most versatile size. Works from beginner through advanced. Good power, good feel, forgiving enough for recreational play.
• 102–105 sq in: Beginner-intermediate range. Larger sweet spot, more power, less precision at high swing speeds.
• 115+ sq in: Maximum forgiveness, minimum control. Pure beginner frames.

Weight

Racket weight is listed unstrung in grams. Add approximately 14–18g for strings when thinking about what you'll actually hold.

• Under 275g: Very light. Easy to swing but lacks stability at contact. Common in beginner pre-strung frames.
• 275–290g: Light performance range. Good for players who want maneuverability without sacrificing all stability.
• 295–305g: The most common performance range. Used by the majority of competitive club players and most tour professionals.
• 310–320g: Heavy players rackets. Requires a well-developed swing but delivers exceptional stability and plow-through.

The counterintuitive truth: Very light rackets can actually stress the arm more than properly weighted ones. When a light racket gets knocked back by a heavy incoming ball, your arm muscles have to work harder to stabilize. A well-balanced 305g racket often feels more effortless than a 265g one.

Balance

Balance is measured in millimeters from the butt of the racket to the balance point. The midpoint of a standard 27" racket is 343mm. Lower numbers are head-light; higher numbers are head-heavy.

• Head-light (315–330mm): Weight sits toward the handle. More maneuverable, preferred by advanced players and serve-and-volley players.
• Even (330–345mm): Balanced weight distribution. All-around feel.
• Head-heavy (345mm+): Weight sits toward the head. More power on groundstrokes, more difficult to volley with. Common in lightweight beginner frames that need the extra mass up front to generate pace.

Stiffness (RA Rating)

The RA (Racket Advisor) stiffness rating measures how much the frame deflects under load. Higher number = stiffer frame.

• Below 60: Flexible. Comfortable on the arm, excellent feel, less built-in power. Wilson Clash 100 v2 (RA 55) and Wilson Shift 99 (RA 58) are the most extreme examples.
• 60–67: Moderate flex. Good balance of power, feel, and comfort. HEAD Speed MP (RA 62), Yonex EZONE 100 (RA 66).
• 68–72: Moderately stiff. More power, less comfort. Babolat Pure Aero (RA 67), Babolat Pure Drive (RA 71).
• 73+: Very stiff. Maximum power transfer, maximum arm stress. Only appropriate with soft strings at lower tensions.

String Pattern

The string pattern describes how many main strings (vertical) and cross strings (horizontal) are in the stringbed.

• 16×19 (open pattern): More space between strings. Strings move more freely, generating more spin. The ball bites into the stringbed and is launched with topspin. Better power, slightly less durability.
• 18×20 (dense pattern): Tighter, more controlled. Strings move less, producing a flatter, more precise response. Better for players who want to control their own spin without the frame doing it for them.

The overwhelming majority of recreational players use 16×19. The 18×20 is primarily for advanced players who generate their own pace and want maximum precision.

Swing Weight

Swing weight (measured in kg·cm²) is a more meaningful measure of how heavy a racket actually feels in motion than static weight alone. A head-light 305g racket can swing lighter than a head-heavy 290g racket. Most players fall in the 300–330 range; higher swing weights provide more plow-through on groundstrokes.

Part 2: Understanding Strings

Strings are the most underinvested piece of equipment for most club players. Changing strings can have as much impact on performance as changing rackets — and costs a fraction as much.

String Types

Polyester (co-poly): Monofilament construction. Low elasticity, high durability, excellent spin. Best for competitive players with fast swings. Can cause arm issues in players with incomplete technique or existing injuries. Examples: Luxilon ALU Power, Solinco Hyper-G, Babolat RPM Blast.

Multifilament: Hundreds of micro-filaments bundled together. High elasticity, excellent comfort, good power. Ideal for beginners, recreational players, and anyone with arm issues. Examples: Wilson NXT, Tecnifibre X-One Biphase, Tecnifibre NRG2.

Natural Gut: The original tennis string, made from cow intestine. Unmatched feel, exceptional power, best-in-class tension maintenance, maximum arm-friendliness. Expensive ($40–55/set) and fragile in wet conditions. Examples: Babolat VS Touch, Wilson Natural Gut.

Synthetic Gut: Budget all-rounders made from nylon. Solid across the board but excellent at nothing. Fine for beginners or as a cost-effective option between restrings. Examples: Prince Synthetic Gut Duraflex, Wilson Synthetic Gut Power.

String Gauge

Gauge is the string's diameter. Thinner strings generate more spin and feel but break faster; thicker strings are more durable.

• 15g (1.35–1.41mm): Thick, very durable. Rare outside of extreme string-breakers.
• 16g (1.26–1.34mm): Standard. Good durability and feel for most players.
• 16L / 1.25mm: The most popular gauge for polyester strings on tour.
• 17g (1.20–1.25mm): Thinner. More spin and feel, less durable. Popular for advanced players on poly.
• 18g (1.10–1.19mm): Very thin. Maximum feel, breaks quickly.

When to Restring

A useful heuristic: restring as many times per year as you play per week. Playing twice a week? Restring twice a year. Playing four times a week? Four times a year.

Polyester strings go dead much faster than gut or multi. Even if they're not broken, poly loses 20–30% of its tension within a few weeks and becomes "dead" — overly stiff with poor feel and low spin potential. Playing on dead poly strings is bad for your arm.

Part 3: String Tension

Tension interacts with both string type and racket stiffness. The short version:

• Lower tension: More power, more spin (snapback effect), more comfort, better for slow swingers
• Higher tension: More control, firmer response, better for fast swingers who want precision

Recommended starting points: 46–50 lbs for polyester, 53–57 lbs for multifilament, 54–58 lbs for natural gut.

Stiff racket + high tension is the most arm-unfriendly combination. If your arm bothers you, dropping tension 4–6 lbs is often faster relief than switching strings entirely.

Part 4: Dampeners

Vibration dampeners sit between the main strings below the bottom cross string. They dampen the high-frequency "ping" sound at contact and change the feel slightly. What they don't do: protect your arm from the low-frequency vibration that causes tennis elbow. That vibration is at a much lower frequency than what dampeners affect.

That said, many players — including most tour professionals — use them for the subjective feel change. Button-style dampeners (Wilson Pro Feel, Babolat Custom Damp) are the most common. Worm-style dampeners (Wilson Shock Shield, Gamma Shockbuster II) thread through multiple strings for more comprehensive vibration reduction, which some arm-sensitive players find helpful.

Use one if you prefer the feel. Don't rely on one to protect an arm injury — the string and racket choice matters far more.

Part 5: Grips and Overgrips

Grip size is measured in eighths of an inch or as an L-number (L1–L5). The most common sizes are L2 (4¼") and L3 (4⅜"). If your grip is too small, you grip harder to compensate, increasing forearm tension and injury risk. If too large, racket manipulation becomes difficult.

A quick test: hold the racket with an Eastern forehand grip and slide the index finger of your non-dominant hand between your fingers and palm. If it fits snugly with a small gap, you have the right size. No space means too large; too much space means too small.

Overgrips go over your existing base grip to add tackiness, moisture absorption, or cushion. They need replacing every 3–6 hours of play (sooner in hot, humid conditions). Wilson Pro Overgrip and Yonex Super Grap are the most popular for tackiness. Tourna Grip Original is the go-to for heavy sweaters who need absorbency over tackiness.

Replacement grips swap out the base grip entirely. If your base grip is compressed, cracked, or just worn out, replace it before adding an overgrip — you're just padding a broken foundation otherwise.

Building a Complete Setup: Budget Tiers

Budget ($100–150 total): HEAD Ti.S6 or Babolat Boost Aero (pre-strung, no string purchase needed). When it breaks or goes dead, restring with Prince Synthetic Gut Duraflex at 55 lbs.

Mid-range ($200–280 total): Dunlop FX 500 or Yonex EZONE 105 + Tecnifibre X-One Biphase or HEAD Velocity MLT multifilament at 53–55 lbs. This is a genuinely solid club setup.

Performance ($300–400 total): Wilson Blade 98 v9 or Babolat Pure Aero + Solinco Hyper-G or Luxilon ALU Power poly at 46–50 lbs. This is the range where setup matters as much as technique.

Premium (no limit): Best frame for your style + Babolat VS Touch natural gut crosses / RPM Blast mains (hybrid) or Wilson Natural Gut in the mains. This is what most tour professionals play.

The Complete System

The most important thing to understand: racket, strings, and tension work as a single integrated system. A stiff racket with stiff poly at high tension is very different from the same racket with natural gut at lower tension. The frame determines the possible range; strings and tension tune within that range.

Rather than guessing at the right combination, RacketIQ analyzes your player profile — skill, style, speed, physical considerations, budget — and recommends a complete setup tuned to your game.