This is not really something to be too bothered by since most racquet lengths for adult racquets are 27 inches or 68.58 cm.
However, there are so-called “plus” or “XL” racquets that are either 27.5 or 28 inches (71.1 cm). Yes, there are also some models around 27.25 inches (69.2 cm), but 27.5 (69.85 cm) is the most popular among extended racquets.
Why do some players want a longer racquet length? Well, the extended racquet gives you a higher swing weight and more power without adding weight to your frame. It will also allow you better reach and power on serves especially.
The downside of an extended racquet is maneuverability. It will generally be more sluggish to swing. A longer frame also has a different contact point, which can take some time to get used to.
Many shorter players on the tour use extended racquets for better leverage and power. Diego Schwartzman is a prime example, but there are also taller players like the now-retied John Isner and Serena Williams who enjoy longer racquets. Consider an extended frame if your serve is one of your key shots.
It’s not easy to find extended racquets on the market. Babolat and Yonex usually create plus versions of their popular models Pure Drive, Pure Aero, Ezone and VCORE, but it’s relatively rare.
I am specifically curious about testing the Babolat Pure Aero Plus, but have not had the possibility yet. Personally, I’m never a hundred percent comfortable with longer racquets.
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