Here’s the direct answer: start in the middle of the tension range printed on the racquet’s throat. That’s it — that’s the rule that covers 90% of juniors. Tension is fine-tuning, not magic, but getting the range right matters for power, control, and arm comfort. Below are the numbers by string type and the simple logic behind them.
The Tension Ranges by String Type
| String Type | Tension Range |
|---|---|
| Nylon / synthetic gut and natural gut | 50–60 lbs |
| Polyester | 44–54 lbs (about 5 lbs looser than multifilament) |
| Hybrids (poly mains + soft crosses) | 46–56 lbs |
Notice the pattern: stiffer strings get strung looser. Polyester at 55 lbs would feel like a board and punish a young arm; the same kid on synthetic gut at 55 lbs is right in the comfort zone.
Looser vs. Tighter: What Changes
Two sentences explain all of string tension:
- Looser = more power and more comfort. The strings act like a trampoline, giving the ball extra spring and absorbing more shock.
- Tighter = more control. The ball leaves the strings with less trampoline effect, so big swings stay in the court — at the cost of comfort.
For juniors, this tradeoff almost always resolves toward the looser side: young players need help generating depth, and their growing arms need the comfort.
The Golden Rule: Middle of the Throat Range
Every racquet has a recommended tension range printed on the throat (the shaft just above the handle). Start dead in the middle of that range. Play a few weeks, then adjust: balls flying long? Go a couple of pounds tighter. Balls landing short with no pop? Go a couple of pounds looser. Small steps — 2 lbs at a time — and only change one thing at once.
Be the Wall: Don’t Make Tension a Drama
Some parents treat string tension like a secret formula, interrogating their kid after every miss about whether the strings felt “right.” Don’t. Be the wall: set a sensible middle-of-the-range tension, let them play, and adjust calmly if something’s clearly off. No yelling about shanks, no shaming, no equipment inquisitions — your kid has to love the game, and nobody loves a game that comes with a post-match interrogation about string bed stiffness.
Quick Takeaway Checklist
- Start in the middle of the tension range printed on the racquet throat
- Nylon/synthetic gut and natural gut: 50–60 lbs
- Polyester: 44–54 lbs — about 5 lbs looser than multifilament
- Hybrids: 46–56 lbs
- Looser = more power and comfort; tighter = more control
- Adjust in small 2-lb steps, one change at a time
- When in doubt, juniors go looser — power and comfort beat marginal control
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