Astrox 55
Model AX-55
Price history
Not enough dated pre-owned sales yet for a price chart — our threshold is 3. 1 verified sale on record so far.
1 verified transaction on record · USD · methodology
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Astrox 55: the 5U Astrox Yonex built for teenage “future aces”
Built for future aces
Yonex launched the Astrox 55 in September 2018 for school players, not professionals. Its Japanese release was headlined as a racquet to back the “future aces” (未来のエース), and said it was aimed mainly at intermediate junior-high and high-school players, whose most common request was a faster smash. Yonex’s English release put the target age at 13 to 18. The answer was weight. The 55 came in 5U, an average of 78 g, and Yonex’s footnote pointed out that every other model in its Astrox series was 3U (88 g) or 4U (83 g). That made it the lightest Astrox in Yonex Japan’s range when it went on sale worldwide in mid-September 2018. It was made in Japan.
The Astrox system, scaled down
Yonex’s aim was more smash speed without the mass of the senior models. The 55 kept the series’ Rotational Generator System, which places weight at the frame top, the T-joint and the grip end so the racquet recovers quickly after a swing, and Yonex said the lighter build made it easier to maneuver on power shots. The shaft used Namd, Nitta Corporation’s method of coating carbon fibers with carbon nanotubes, which Yonex described as flexing deeply on the swing and snapping back at impact. The frame is high-modulus graphite and tungsten, without the Nanometric of the 77, 88 and 99, and the cap is Yonex’s Control Support Cap rather than the Energy Boost Cap of the 88 and 99. Yonex listed a medium flex, a frame 10 mm longer than standard and 19–24 lbs recommended tension. The Japanese price was ¥19,000 before tax, and Yonex USA’s 2019 catalog listed it at $245.
No professional on record
No professional is documented using the Astrox 55. Yonex’s Japanese product page rated it for intermediate men and women only, leaving the advanced and beginner columns blank. Yonex’s best-known professionals in 2018 used the senior models: Kento Momota and Marcus Fernaldi Gideon on the 88 D, Viktor Axelsen on the 88 S, and Momota on the 99 from August. The one star name attached to the 55 comes from a misreading. Yonex’s launch release says the Astrox series had won the trust of top players including Akane Yamaguchi, and retail copy repeats that line for the 55, but the sentence describes the series, not this model.
Light Silver, Shine Pink and the 55 A
Light Silver was the launch color. Yonex Japan added Shine Pink as a “new design” in mid-September 2019, with the same AX55 code and specifications, so a 2019 date belongs to the pink finish rather than the racquet. Both colors were still in Yonex Japan’s catalog in May 2022. By November Yonex had listed its replacement, the Astrox 55 A, released in mid-December 2022. Despite the name it is a different racquet: still 5U and made in Japan, but with Volume Cut Resin in the frame, Namd and Ultra PE Fiber in the shaft, and Shine Purple or Champagne finishes; it has its own page. The 55 came last in Yonex Japan’s 2018 Astrox list, after the 99, 88 S, 88 D, 77 and 66. Abroad, Yonex sold the Astrox 22 from the same month, a 2F frame averaging 68 g, so the “lightest Astrox” description holds only for Yonex Japan’s range, and there only until the 2F Astrox 00 of 2020; both have their own pages.
Four years in the catalog
Verified sales of the Astrox 55 are few so far, all pre-owned and from the Asian resale market, so the value in the price panel above is an estimate. The verified sales shown are of the 2018 original; the Astrox 55 A is a separate model with its own page. The 55 was a catalog model for about four years, sold worldwide in two colors, and Yonex never published production figures or sold it as a limited edition. With no professional association, its appeal is as a playing racquet from the first seasons of the Astrox line, and condition is what separates one example from another.
Mistaken identity
No counterfeit aimed specifically at the Astrox 55 has been documented. The practical risk is confusion with the Astrox 55 A. The two share the number, the 5U weight, the Japanese origin and the 19–24 lbs tension range, so a listing that says only “Astrox 55” can mean either. The original came only in Light Silver and Shine Pink, the 55 A only in Shine Purple and Champagne.
A brief Yonex kept
Yonex kept the idea after the 55 left the catalog. The Astrox 55 A took over the 5U intermediate slot in December 2022, and Yonex Japan described it as pairing maneuverability with a shaft designed to flex more for a stronger power smash, the same brief in new materials. The 55 itself shows how Yonex tiered the early Astrox range: the Rotational Generator System and Namd shaft of the pro models, brought down in weight for teenagers learning to smash.
Start with the marking: Yonex lists the Astrox 55 as made in Japan in both colors. Then make sure it is the 2018 original and not the 2022 Astrox 55 A. The original has the code AX55 and came only in Light Silver or, from 2019, Shine Pink; the 55 A is Shine Purple or Champagne. Yonex’s specification is 5U at an average of 78 g unstrung, grip sizes G5 and G6, medium flex, a frame 10 mm longer than standard, a high-modulus graphite and tungsten frame with a Namd shaft, and 19–24 lbs recommended tension. Yonex’s own authenticity test is the hologram sticker, which should resist lifting with a fingernail. Retailer guides add that genuine serial numbers are laser-engraved as well as printed. If in doubt, Yonex advises contacting its customer support.
The Astrox 55 is a player’s racquet with a clear design brief and no professional history, so its interest lies in condition and in its place among the first Astrox models. Its verified sales are still too few to judge the market by. The main thing to check in any listing is that it describes the 2018 original rather than the 2022 Astrox 55 A, which shares the number but not the construction.
Verified prices last updated Sep 2026. All data based on tracked secondary market transactions.