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Old 08-16-2002, 05:08 PM   #1
Scooby Specialist
Member#: 20437
Join Date: Jun 2002
Chapter/Region: Tri-State
Location: Downingtown, PA
1999 Impreza RS
STI Ver7

Default newbie question about Sway bars - please help


I have a question about sway bars. What does it mean to say sway bar is 20mm? What does 20mm mesures? I first thought that it would be a diameter of the bar. But when the sway bar is adjustible from 18-20-22mm then how does that works, you can't really change a diameter.

Please can some one explain it to me?

Thank you

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Old 08-16-2002, 05:27 PM   #2
Scooby Newbie
Member#: 4577
Join Date: Mar 2001
Location: Victoria, British Columbia
1998 2.5RS
Black Diamond Pearl


Hi Osgood30

If you have a non-adjustable 20mm anti-roll bar, the bar will in all probability measure 20mm in diameter.

An adjustable bar, such as a 18-20-22, simulates different diameters by using different attachment points at the bar ends (three in the example). Each attachment point creates a different effective length and therefore a different rate.

Is that clear?
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Old 08-16-2002, 05:34 PM   #3
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Join Date: Feb 2002
Location: san francisco, ca
90BJ Legacy LS ABS
AWD 946 Rio Red Jpn built


will in all probability measure 20mm in diameter
That is usually true. However different manufactures 20mm bar might be stiffer or softer than another so sometimes even though it says 20mm it might be something else, they tell you that its as strong as a standard 20mm
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