Isometric 250 Long
Model ISO-250L
Price history
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Isometric 250 Long: the Medium Stiff Advanced Isometric of Yonex’s 1996 catalog
An Advanced-level Long, tagged New
In Yonex’s 1996 Asian catalog the Isometric 250 Long stands under the heading “Long,” beside the 150 Long. It is one of three Advanced-level frames on the spread, all with the Built-In T-Joint, and it carries a New tag and the line “High speed touch player.” The catalog is undated on its pages; the 1996 year comes from the collector who scanned it, and a New tag is evidence of a recent launch, not proof. Advanced is the level below the Professional Tour 800 and Power 600.
Graphite, Flex 4, Medium Stiff, 2U
The catalog prints a graphite frame on a high-modulus graphite shaft and rates it 4 for flex, power and control. Yonex USA’s Isometric page of 1999 gives Medium Stiff, 2U (90–94 g), grip size G4 and a recommended 16–18 lb on the mains and 18–20 lb on the crosses; Yonex’s spec chart of the same period plots it at the second mark from Stiff. No Yonex document gives a balance point, a length, a made-in country or an item code, and the catalog does not say what “Long” means.
No named player
Yonex names no player for the 250 Long. “Advanced” in the catalog is a player level, not a user, and the spread carries no player photographs.
Two Advanced siblings and a Japanese 250
The Power 200 shares its high-modulus shaft but is rated 3 for flex; the 150 Long has a plain graphite shaft and 3 across the board. Yonex USA’s page also lists an Isometric Tour 300 with the same printed specification under a different name; it has its own page. Yonex Japan sold a separate Isometric 250, item code ISO-250, in 3U with an all-carbon frame; no Yonex document ties it to this export model. In the photo the hoop is green and the soft cover is dark blue, printed ISO 250 LONG. Yonex names no color, and no edition is documented.
Listed from 1996 to 1999
After the 1996 catalog it appears on Yonex’s spec chart of 1999 and on Yonex USA’s Isometric page, first recorded in May 1999 beside the Tour-800, Tour 300 and 90 Light; the 90 Light has its own page. That page stayed online unchanged to at least May 2000, which dates no sale. The 2000 Asian catalog’s Isometric pages open with the Ti Swing Power, Swing Power-500 and 750 Muscle and omit it, so 1999 is its last documented year and no production end is documented. No Yonex document found prints a price for it. No verified sales are recorded yet.
Checking the name
No counterfeit of the Isometric 250 Long is documented. The identity problem is the name: a listing for an “Isometric 250” may be Yonex Japan’s 3U ISO-250, a different record, and the “Tour-300” and “90 Light” are separate Yonex models. The only weight class Yonex documents for the 250 Long is 2U.
Between the 500 and the Swing Power
The 250 Long belongs to the Isometrics between the 1992 Isometric 500 and the Swing Power series of 1998. With the Tour 800 it is one of only two frames from the 1996 spread that Yonex’s 1999 export chart and the Yonex USA page still listed. Its record is one catalog photograph, one chart column and one US page.
Yonex USA documents this model as 2U (90–94 g) with a G4 grip and a Medium Stiff flex; a 3U frame is not a documented 250 Long. In its catalog photo Yonex printed ISO 250 LONG on the soft cover; how the name appears on the frame is not documented, so match the full name “Isometric 250 Long”, not a bare “250”, “Tour-300” or “90 Light”. Yonex documents no item code, country of manufacture or colorway for it. On a frame about 30 years old, check the throat, the hoop and the grommets for cracks.
Unlike its two Advanced siblings, the 250 Long has a second Yonex record, in the 1999 chart and Yonex USA’s page, so its identity is clearer. Confirm the full name, the 2U weight and the flex before assuming a match, treat any link to a player as unsupported, and keep it apart from Yonex Japan’s ISO-250.