Super Isometric 10
Model ISO-S10 · Peter Gade
Price history
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Super Isometric 10: the 1996 “razor frame” Yonex Japan listed for Peter Gade into 2004
The world’s first razor frame
Yonex launched the Super Isometric 10 in Japan in early 1996 under the headline “the world’s first razor frame is born.” The frame and a built-in T-joint were molded at the same time as one hollow piece, which let Yonex make the frame’s cross-section 30% slimmer and, it said, cut air resistance by 10% for faster smashes. Looking back in 2017, Yonex said that a hollow one-piece frame was then found on this model alone in the world, that it was known for a sharp swing, and that it earned the trust of many top players. It is the second racquet on Yonex’s timeline of landmark isometric frames, after the 1992 Isometric 500 and before the 1998 Isometric Swing Power 900.
Launch: ¥20,000, all carbon
The launch ad ran on the back cover of the March 1996 issue of Japan’s Badminton Magazine, dated February 20, 1996, with a “new release” badge. It listed an all-carbon frame and a super-slim carbon shaft, two weights, 3U and 2U, each with grips 4 and 5, and a price of ¥20,000 before tax with a full racquet case. Yonex stressed strength and resistance to twisting alongside the slimness, and kept the square isometric head for its large sweet spot and its rebound on smashes and receives. Yonex Japan’s staff pages give the item code as SISO-10. No product page survives: Yonex Japan’s pages in the web archive begin in late 1998, and none of its archived lineups names the model. Yonex published no balance, flex rating or country of manufacture for it.
Peter Gade’s listed racquet
The player Yonex tied to the model is Peter Gade. Yonex Japan’s advisory-staff page listed his racquet as the SISO-10 in every archived version from its first capture, in late June 2003, to April 2004; by mid-June 2004 the entry read MP-80. The page records a player’s current racquet, not what he used in a given match, and the results printed beside it, from the 1999 All England to the 2002 Denmark Open, are not linked to the frame. Years later, Yonex’s Legendary Players feature on Gade pictured an Isometric Slim 10, dated 1997, under the label of his 1998 Yonex Open Japan title; the Slim 10 may be the export name of this racquet, but Yonex never equates the two. Its marketing told a different story in 1999, when it advertised the new Ti10 as used by the world No. 1, Gade. Wikipedia’s equipment list for him gives an “Isometric Slim 10” for 1997–2004 and the Ti10 as “limited use” in 1999, citing no Yonex source. Nothing links it to the 1996 Atlanta Olympics either: Poul-Erik Høyer-Larsen, the Yonex player who won the men’s singles there, was reported to be using a six-year-old “lucky” racquet. No other player is listed on the SISO-10.
Names that cause confusion
A Yonex export catalog of about 1996 shows a new Isometric Slim 10, also built around a built-in T-joint, rated for professional players and labeled a “high speed power player” frame, but painted green and yellow rather than the dark finish in the Japanese ad. The two other Professional-level Isometrics on that spread, the Tour 800 and Power 600, have their own pages. Yonex never says whether the two are one racquet sold under two names. A listing that says only “Isometric 10” could be either. Neither is the navy 1992 Isometric 500 or the 1998 Swing Power 900, whose shafts carry colored type tabs. Yonex documented no other colorway and no edition of the Super Isometric 10.
A short, thin record
All of Yonex’s records of the Super Isometric 10 on sale date from 1996, and no production end is documented. The Yonex Japan homepages of December 1998 and October 1999 promote only the Swing Power 900 and the titanium frames, and its 2002 old-model index does not name the S10; those pages show new or selected models, so its absence there dates nothing. The code itself stayed current in Yonex’s player records, on Gade’s staff entry, until spring 2004. Yonex published no production figures. No verified sales are recorded yet.
Copies and condition
No counterfeit of the Super Isometric 10 is documented. The practical risks are mistaken identity and age. Because the frame and T-joint were molded as one hollow piece, Yonex’s ad shows no separate joint piece at the throat. A frame from 1996 has spent three decades as a strung racquet or in storage, so the head, the molded throat and the shaft deserve close inspection, and a grip or butt cap may have been replaced.
Before the titanium era
The S10 sold at ¥20,000, the same price as the 1998 Swing Power 900, which followed it on Yonex’s timeline with a different idea: one model in four tuned types. In spring 1999 the Ti10 arrived at ¥24,000, the titanium-mesh frame that Yonex now advertised with Gade. The razor-frame name outlived the racquet: the 2019 Nanoflare 800 revived it for a different, streamlined frame. The S10’s appeal is as a Yonex landmark from before the titanium era and as the frame Yonex Japan named for Gade into 2004.
Read the printed name: the model is the Super Isometric 10, item SISO-10 on Yonex Japan’s staff pages. Yonex’s launch ad shows a dark frame with an orange-gold stripe along its edge, a gold Yonex logo at the throat and no visible joint piece. Yonex sold it in 3U and 2U only, grips 4 and 5, so a 4U example does not match the launch specification. Yonex published no balance, flex or country of manufacture for it, so treat a seller’s figures as unverified. A green-and-yellow frame printed Isometric Slim 10 is the export model, which Yonex never equated with this one; a frame with colored tabs near the handle is a Swing Power model.
The Super Isometric 10 is a piece of Yonex’s isometric history: the frame Yonex launched as the world’s first “razor frame,” and the racquet Yonex Japan listed for Peter Gade into 2004. Buy it on the printed name, the dark finish and the weight class, and inspect a thirty-year-old frame for cracks. Treat any claim that a frame was Gade’s own, or was used to win a title, as unproven.