Most club players string too tight. They hear that the pros play at 30 lbs or more, ask the stringer for 28, and spend the next three months wondering why their clears fall short and their elbow aches. Here are honest string tension ranges by level, what tension really does to your shots, and the one rule that voids your racket warranty if you ignore it.
What tension actually changes
Tension is the pull, in pounds (lbs) or occasionally kilograms, that the stringing machine applies to each string as it is woven. A typical club racket is strung somewhere between 20 and 27 lbs. Here is what moves as you go up.
Sweet spot. Lower tension means a bigger area of the string bed that returns the shuttle cleanly. At high tension the strings barely move, so a hit even a centimetre off centre loses a lot of its power. This is the single biggest reason new players should string low: their contacts are not yet consistent enough to use a small sweet spot.
Repulsion (power). Counter-intuitively, lower tension gives more power for a slow swing. The string bed deforms more, stores energy like a trampoline, and throws the shuttle back. At high tension the bed is stiff, and you only get power if your own racket-head speed is high enough to deform it. Fast swing, high tension: more power. Slow swing, high tension: less.
Control and feel. This is what high tension is actually for. A stiff string bed holds the shuttle for a shorter time and sends it exactly where the racket face points, with a crisper sound and sharper feedback. Players with a trained swing choose high tension because their placement improves, and they accept the smaller sweet spot because they rarely miss it.
Durability. Higher tension means more stress on every string and more notching at the crossings, so strings break sooner. Thin strings at high tension on a frame with sharp grommets can last a week. Thick strings at low tension can last a year.
Realistic ranges by level
| Level | Typical tension | Why |
|---|---|---|
| Beginner, first year | 19–22 lbs | Large sweet spot, free power, forgiving on mishits |
| Club intermediate | 22–25 lbs | Balance of power and control for a developing swing |
| Strong club / county | 25–27 lbs | Control for players who hit the centre consistently |
| Advanced and above | 27–30 lbs | Precision for fast, trained swings; sweet spot no longer a concern |
Those bands are deliberately conservative. If you are unsure, pick the bottom of your band. It is much easier to go up 1 lb at the next restring than to live for three months with a bed that is too tight for you.
Two adjustments. Doubles players who hit a lot of flat drives often like 1–2 lbs more than they would for singles, for the crisper response. And if you are coming back from an elbow or shoulder problem, drop 2 lbs: a softer bed absorbs more of the shock before it reaches your arm.
The max-tension warranty rule
Every racket frame has a maximum recommended tension printed on the shaft or inside the cone, and listed on our racket pages as “max tension”. Most current graphite frames sit between 27 and 30 lbs: the Yonex Astrox 99 Pro and Nanoflare 1000Z are rated to 28 lbs; the Victor Auraspeed 2800 and Li-Ning Axforce Cannon to 30; the Yonex Arcsaber 7 Tour to 27.
If you string above that figure and the frame cracks, the manufacturer will not replace it, and most stringers will ask you to sign a waiver before they do it. Plenty of advanced players do string above the limit on frames built to take it, and plenty of frames survive. But it is your risk, not the brand’s. If you want 30 lbs, buy a frame rated for 30 lbs.
There is a quieter point here too. The maximum is a structural limit, not a recommendation. A frame rated to 28 lbs plays perfectly well at 22.
Popular strings and what they are for
Gauge is the string’s thickness in millimetres. Thinner strings give more repulsion and a sharper feel but break sooner. Thicker strings last longer and feel softer. All figures below are the manufacturers’ stated gauges.
| String | Gauge | Character | Who it suits |
|---|---|---|---|
| Yonex BG65 | 0.70 mm | Multifilament nylon with braided outer; durability first, soft and forgiving | Beginners, heavy string-breakers, anyone who wants one restring a year |
| Yonex BG80 | 0.68 mm | Braided nylon core reinforced with Vectran; firm, quick repulsion | Hard hitters who want a stiff, controlled bed |
| Yonex Exbolt 63 | 0.63 mm | Thin “Forged Fiber” bonded construction; crisp, fast, lively | Players who want repulsion from a thin string with better-than-usual durability for the gauge |
| Yonex Aerobite | 0.67 mm mains / 0.61 mm crosses | Hybrid: a textured thicker main with a thin cross, sold as a pre-cut pair | Players who want spin on slices and a solid touch at the net |
| Li-Ning No.1 | 0.65 mm | Nylon multifilament, hard feel, high repulsion; Li-Ning quotes a 30 lb maximum | Attacking players after power with a crisp sound |
| Victor VBS-66N (VBS-66 Nano) | 0.66 mm | Nano core with nylon multifilament wrap; high resilience, sharp sound | Attackers who want power without losing control |
A few practical pairings.
If you are a beginner or you break strings often, BG65 at 20–23 lbs is the sensible default, and has been for decades. It is cheap and nearly every stringer has a reel.
If you want more feel and are already hitting the centre, BG80 or Victor VBS-66N at 24–27 lbs gives you a firmer bed without going very thin.
If you want maximum repulsion and accept more frequent restrings, Exbolt 63 or Li-Ning No.1 at 25–28 lbs.
Aerobite is a different proposition. Because the mains and crosses are different gauges, the string bed grips the shuttle and bites on slices and spinning net shots. It takes a few sessions to trust, and some players never like the feel. Try it once before buying a reel.
When to restring
The obvious answer is when a string breaks. The useful answer is earlier than that.
Strings lose tension from the moment they come off the machine. The first few pounds go in the first day or two, then the loss slows, but it never stops. A bed strung at 25 lbs in September is playing at something like 21 or 22 by Christmas, and you have adjusted your swing to compensate without noticing. Then the string breaks, you restring at 25, and the racket feels like a board.
Two rules of thumb. First, the old stringer’s rule: restring as many times a year as you play per week. Three sessions a week, three restrings a year, roughly every four months. Second, restring whenever the sound goes dull or the strings have shifted so far out of line that you are straightening them between points. Both mean the bed has lost its tension.
If you break strings constantly, before going thicker check your racket’s grommets. A cracked or worn grommet cuts the string at that point every time. Replacing one grommet costs almost nothing and can double string life.
Three things stringers wish you knew
Tension numbers are not fully comparable between machines or stringers. An electronic constant-pull machine will produce a tighter-feeling bed at “25 lbs” than an old crank machine at the same setting, because it keeps pulling as the string stretches. If you change stringer and the racket feels different at the same number, that is why. Pick a stringer you like and stay with them so your reference point stays fixed.
Some stringers pull the crosses 1–2 lbs tighter than the mains to keep the frame shape round. Others string both at the same figure. Neither is wrong, but ask which your stringer does, so you know what “25 lbs” means on your tape label.
And a racket with a freshly cracked frame is almost always a racket that was strung above its maximum, clashed with a partner’s racket, or both. Stringers can see a hairline crack you can’t. If yours refuses to string a frame, believe them.
Choosing in practice
- Find your racket’s max tension on our racket pages or on the shaft.
- Pick the bottom of the band for your level from the table above.
- Choose a string by what you break and what you want: durability (BG65), firm control (BG80, VBS-66N), repulsion (Exbolt 63, No.1), or spin (Aerobite).
- Note the date and tension on a strip of tape on the inside of the frame. Next time, change one thing, by 1 lb or one string, and compare.
If you are still deciding which frame to put the string in, the racket finder filters by level and flex, and our beginner racket guide covers the starter options.
