Racket balance and swingweight explained

Balance: where the mass sits

Balance is measured as the distance from the butt cap to the racket's balance point. On a standard 27-inch frame the midpoint is 13.5 inches, and balance is quoted as points away from that midpoint — one point is one eighth of an inch.

• Head light (HL) — balance point closer to the handle. Quicker through the air, easier at the net. Most performance frames are 4-8 points HL.
• Even balance — balance point at the midpoint. Rare in modern frames.
• Head heavy (HH) — balance point toward the hoop. More momentum through the ball, slower to reposition. Common on light beginner frames.

The logic manufacturers follow is consistent: light frames are made head heavy so they still carry momentum, and heavy frames are made head light so they remain maneuverable. Balance is the compensating variable.

Swingweight: the number that combines them

Swingweight is the moment of inertia about an axis near the handle, measured on a specialist machine and quoted as a unitless number in the high 200s to low 300s. It combines how much mass there is with how far that mass sits from your hand.

Because distance is squared in the underlying physics, where the mass sits matters disproportionately. That is why a 275 g head-heavy frame can out-swing a 278 g head-light one by 21 points.

Read that table from the bottom up and the point lands: the two highest swingweights belong to two of the three lightest frames, because both are head heavy.

Twistweight, the third number

Less commonly published but worth knowing. Twistweight is resistance to rotation about the racket's long axis — how much the face turns when you hit the ball off-center toward the edge.

It is why two frames with the same swingweight can feel differently stable on a stretched return. Mass at 3 and 9 o'clock raises twistweight; mass at 12 o'clock raises swingweight. That is the basis of the most common customization in the sport — see how much should a tennis racket weigh.

Which number to shop on

1. 01Swingweight first. It predicts whether you will be on time. Under 305 for a developing swing, 305-318 for club play, 318-330 for competitive.
2. 02Static weight second. It predicts stability against pace and fatigue over three sets.
3. 03Balance third. It is mostly a consequence of the first two, but it tells you how the frame will feel at the net specifically.

Changing them yourself

Lead tape is cheap, reversible and the standard tool. Two grams at a time, one session between changes:

• 3 and 9 o'clock — raises twistweight substantially, swingweight modestly. The first thing to try.
• 12 o'clock — raises swingweight sharply. Two grams here is very noticeable.
• Under the grip — raises static weight while lowering swingweight. Used to counterbalance hoop weight.

Play a frame stock for at least a month first. You cannot judge whether a racket needs weight until you know what it does without it.