Isometric 20 VF
Model ISO-20VF
Price history
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Isometric 20 VF: the aluminum-and-steel Isometric sold as the Isometric-20 from 2002
Aluminum head, steel shaft
The Isometric 20 VF paired an aluminum Isometric head with a steel shaft, rated Stiff and offered only in the U class (95–99.9 g). From 2002, the first year its lists document it, Yonex USA sold it as the Isometric-20 and was calling it the Isometric-20VF by October 2005; Yonex’s 2007 export catalog showed it in orange, made in China. It was the heaviest adult model on Yonex USA’s Isometric page from 2005 on, joined in the U class by the 25 DF from late 2006.
What Yonex listed
Yonex USA’s Isometric page carried an Isometric-20 from August 2002, and its list of June 2004 gives it as Stiff, with an aluminum frame, a steel shaft and U (95–99 g). By October 2005 the same page called it the Isometric-20VF, with the same flex, frame, shaft and weight and a G4 grip. Yonex’s 2007 Badminton Catalogue prints the same build, U (95.0–99.9 g)/G4 and Made in China, and tags it NEW; its spec table gives the flex as Stiff. Yonex USA’s list from late 2007 adds that it was sold strung. No Yonex document gives a balance point, a length or a price.
No named player
Yonex names no player for the 20 VF, and its pages give no playing level for it.
Two names, then the 22 VF
Yonex does not explain the VF added to the name, and nothing in its listings separates the Isometric-20 from the 20 VF. In February 2008 Yonex’s international Isometric list showed an Isometric 22 VF in its place, also Stiff, aluminum on steel, U and made in China; Yonex never says whether it is the same frame, and it has its own page. The Isometric 25 DF, listed beside it from 2006, has the same listed build under another name; it has its own page. The Isometric 20 Jr is a junior model. Earlier still, Yonex’s 2000 Asian catalog shows an Isometric-20 with an aluminum frame and steel shaft in a heavier 3L class (100–104 g) and an Isometric-25 in U; no Yonex source says whether either is the same frame, and each has its own page.
Listed from 2002 to 2007
Yonex USA listed the racquet as the Isometric-20 from 2002 to at least mid-2004 and as the 20 VF from 2005. Its Isometric page last changed in 2007 and stayed online unchanged into 2008, while Yonex’s international list had moved on to the 22 VF by February 2008. The 2007 export catalog is the last Yonex catalog known to show it. No production end is documented, and it does not appear in Yonex Japan’s old-model index. No verified sales are recorded yet.
Telling the names apart
No counterfeit of the Isometric 20 VF is documented. The confusion is between names: the racquet was sold as the Isometric-20 and the 20 VF, the 22 VF and 25DF share its listed aluminum-and-steel build, and the 20 Jr is a junior racquet that Yonex USA lists at 21 inches in a 2U class. An Isometric-20 in the 3L class (100–104 g) is the 2000 catalog model; it has its own page.
A renamed starter line
The 20 VF is one step in a run of aluminum Isometrics that Yonex renamed every few years. Its whole record is a handful of Yonex USA lists and one catalog page.
Yonex documents the 20 VF as Stiff, U (95–99.9 g) with a G4 grip, an aluminum frame on a steel shaft, made in China; a graphite shaft, a 2U or 3U class or a G5 grip points to a different model. The 2007 catalog shows it in orange. Read the model name on the frame, since the 22 VF and 25DF share the listed build and its earlier name was Isometric-20. On an aluminum frame, check the hoop for bends and the shaft for corrosion.
Confirm the “20 VF” name and the U weight before treating a frame as this model. Yonex documents no balance, length or price for it, so a listing that quotes one is relying on another source. Expect ordinary club wear on a frame sold strung as a starter.