18 gauge (1.20mm) tennis strings
18 gauge — 1.18 to 1.20mm — is the thinnest standard string thickness, used by spin specialists who prioritise grip and feel above all else. The thinner construction lets the strings deflect and snap back more aggressively on contact, biting the ball harder and generating noticeably more spin than 16 or 17 gauge. The trade-off is significant: 18 gauge breaks faster than any other thickness, often within 5-10 hours of heavy hitting. For dedicated spin players who restring frequently anyway, the spin gain is worth it.
How to choose
If you go through 1-2 sets per month already and want maximum spin, 18 gauge is for you. If you string less often or hit flatter, look at 17 gauge instead. Browse spin tennis racquets for matched frame options.
Frequently asked questions
Is 18 gauge tennis string fragile?
Yes — significantly more fragile than 16 or 17 gauge. Most heavy spin players break 18 gauge in 5-10 hours of play.
Why use 18 gauge then?
Maximum spin and touch. The string grips and snaps back more aggressively, generating more rotational energy on the ball.
Is 18 gauge string good for beginners?
No — beginners typically benefit from durable thicker strings that won't break during practice. Stick with 16 gauge.
What gauge do most pros use?
17 gauge is the most popular tour gauge. Some heavy-spin specialists use 18, particularly in hybrid set-ups.
Can I use 18 gauge in a hybrid?
Yes — common set-up is 17 gauge poly mains plus 18 gauge multi crosses. Best of spin and comfort.
