Suspension question..., ...probably for the racers amoung us Options

[BMXerror]

Anybody know the equivalent spring rates for some of the larger hollow torsion bars? 21-24 mm. I don't know what, say, '23mm' means in terms of spring rate at the wheel. Any help on where to find, or how to calculate such information would be great! Thanks.
Mark D.

[pcar916]

Long ago I measured the coil-spring equivalent rate for mine (solid 23mm bars) but I don't recall the lever-arm measurement. That's the distance from the middle of the torsion bar to the center-line of the wheel. Whip out your tape-measure and find that one!

Here's a site with a calculator and the terms included.

http://www.alternativecarparts.com/utiliti...orsionbars.html

The assumption with this calculator is the torsional resistance of our T-bars. If any of us knows the right number here please give it up. (IMG:style_emoticons/default/piratenanner.gif)

Don't include the splined portion of the T-bars in the length of the torsion bar.

Here's another one...

http://www.circletrack.com/car_racing_calc...r/photo_01.html

Here's another site with more general information.

http://www.spring-makers-resource.net/torsion-springs.html

Have fun!