Measuring shock spring rate or what rate do you have on your 83GS750?

[salty_monk]

Is there a reliable way to measure rate? I'm thinking of something like adding a 5kg weight and seeing how many mm it moves from free length or something?

For those with the 750 monoshock model, doyoi have any spring rates listed?

Thanks

Dan

 

[Steve]

Somewhere on the Progresive Suspension site is a Technical Specifications page that shows what is available. Most of the dual-shock models have rates that range between about 70 and 150 or so, and that is pounds per inch.

In the case of your monoshock, I think you would be surprised to see how high the rate is. Since there is only one shock, you would automatically have to double the dual-shock rate, then factor in the extra leverage imposed by the design. Looking at page 15 of the spec page, I see some that have rates of 800/900 pounds per inch. No idea what they fit, but as you can see, the rates get really high, dpending on the application.

Somehow, I don't think your 5 kg mass is going to have enough gravitational attraction to even be noticed.
Start your testing with 50 kg, it will be much easier to see (and measure) the deflection.

.

 

[salty_monk]

Makes sense.. the stocker doesn't deflect much when I stand on it... I weigh about 75kg with my clothes on.

 

[posplayr]

If you had a calibrated strain gauge, and could clamp the spring, then measure the revolutions of the spring compressor. The amount of change in strain could be converted to spring constant:

K = Del Force/Del Position

http://www.sensorland.com/HowPage002.html

 

[salty_monk]

I think I better wait for Billy or someone to come along & give me the figure off that works shock...

I can hope anyway! :lol:

 

[Nessism]

If you had a calibrated strain gauge, and could clamp the spring, then measure the revolutions of the spring compressor. The amount of change in strain could be converted to spring constant:

K = Del Force/Del Position

http://www.sensorland.com/HowPage002.html

Hey Jim,

Gotta link to a strain gauge setup we can buy from Harbor Freight?

 

[posplayr]

Hey Jim,

Gotta link to a strain gauge setup we can buy from Harbor Freight?

If you are inventive you could use a "strain gauge" torque wrench or any other for that matter.

 

[posplayr]

http://www.thegsresources.com/_forum/showthread.php?p=1207643#post1207643