Isometric 25
Model ISO-25
Price history
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0 verified transactions on record · USD · methodology
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Isometric 25: a new steel-shafted aluminum Isometric in Yonex’s 2000 Asian catalog
New in 2000, aluminum on steel
The Isometric 25 appears once in Yonex’s records: a block on page 12 of the 2000 Asian catalog, tagged NEW, with an aluminum frame, a steel shaft and the U weight class (95–99 g), photographed in Lime Green. It shares the page with the heavier 3L Isometric 20 and follows the 50 MF, an aluminum Isometric with a graphite shaft. No later Yonex catalog, list or page is known to show a racquet under this name.
What the catalog prints
The block gives the composition (frame aluminum, shaft steel), the weight U (95–99 g) and a stringing recommendation: Yonex recommends 16–20 lb (7–9 kg), one range for mains and crosses. Unlike the graphite Isometrics on the page before, it prints no flex rating and no grip sizes, and the spec chart at the foot of the same page has no column for it, so Yonex rates neither its flex nor its power or control. Besides NEW, its only tag is ISO. No balance point, length, country of manufacture, item code or price is documented.
No named player
Yonex names no player for the Isometric 25, and the catalog block gives no playing level.
Its page-mate and the later 25DF
On the same page the Isometric 20 has the same aluminum-and-steel build in the heavier 3L class (100–104 g); it has its own page. The 50 MF on page 11 pairs an aluminum frame with a graphite shaft in U. Later Yonex aluminum-and-steel models in U include the Isometric-20 that Yonex USA listed from 2002 (the 20 VF, rated Stiff) and the Isometric-25DF of Yonex’s 2007 export catalog, made in China. Yonex prints no text linking the 2000 Isometric 25 to either, so the number it shares with the 25DF is not evidence of one frame.
One catalog, 2000
The 2000 catalog is both the earliest and the last Yonex record of the Isometric 25, so 2000 is its first and last documented year; the NEW tag points to a 2000 introduction but does not prove a first sale. No production end is documented. It is absent from Yonex USA’s Isometric pages of 1999–2000 and 2002–04, from Yonex Japan’s 2001 racket index and from Yonex’s international Isometric lists of 2008–12. No Yonex price for it is known. No verified sales are recorded yet.
Checking a frame
No counterfeit of the Isometric 25 is documented. The catalog photograph shows a dark frame with lime-green accents and an “ISOMETRIC” print on the shaft. The checks are the build and the class: an aluminum head on a steel shaft at U weight. A graphite shaft points to the 50 MF, a 3L label to the Isometric 20, and a “25DF” print to the 2007 model.
A starter with one record
The Isometric 25 matters mainly to collectors of Yonex’s aluminum Isometrics from around 2000, a line Yonex renamed often. Its record is one catalog block and a photograph, so the name on the shaft and the U class are what tie a frame to it.
Yonex documents only an aluminum frame, a steel shaft and the U class (95–99 g) for the Isometric 25, and recommends 16–20 lb (7–9 kg); no flex, balance, item code or country of manufacture is documented. The 2000 catalog shows it in Lime Green. A graphite shaft, a 3L or 3U label, or a “DF” or “VF” after the number points to another model. On an aluminum frame more than 20 years old, check the hoop for bends or a twisted head, the shaft for corrosion and the joint where the shaft meets the frame.
The Isometric 25 suits a collector completing Yonex’s 2000 Isometric range or its aluminum starters. With a single catalog as its source, any made-in country, flex or balance a seller quotes is not Yonex’s. Confirm the name on the shaft and the steel shaft before treating a frame as this model, and expect club wear on a starter frame.