Do springs grow old? Ans: kinda probably, cheap to renew anyway.

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anthonym
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ok so wifey weighs 50kg (shh), we can balance her on top (as she is a dancer) and I can measure the compression?

SM25T
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Have the paramedics on standby.
garybee
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I don't think 50kg is going to give you enough compression for an accurate calculation. You're only going to get about 1/2" of compression so any error in your measuring will be quite large relative to the travel. Never mind the hilarity you'd have trying to actually line a rule up with the top of the spring with someone's foot wobbling around on it. On second thoughts it's a great idea, can you post the video on here please?

SM25T
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Or even send it to you've been framed. Worth £250. You need a 100kg handyman !
anthonym
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You volunteering ? ;-)

maybe I won't tell her she's not heavy enough...

Golf Juliet Tango
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Take a drill press.

A pair of bathroom scales.

A steel rule.

 

Place spring and rule vertically on scales, the spring under the chuck.  Zero the scale.  Wind drill press down, compressing the spring a measured amount as seen on the rule alongside.  Read the scales.

Voila . . .

Something on the scales under the spring to spread the load helps. 

Excellent (if i owned a pair of scales, it would help).

Stephen Hubbard

Democratic dissent is not disloyalty, it is a positive civic duty

SM25T
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Dont think Anthony has a drill press ... but Georges will have.
anthonym
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Georges will just squeeze it between his fingers and measure with his eagle eye.

Bricol
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Its the only reason I own one :) .  Argos special from when I was trying to work out what I needed on the trials car.

When you do own one - remember to measure the spring relative to the platform on the scales so you get the spring deflection only - not spring and scales.

anthonym
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I found the original purchase invoice from 2000, it specifies race shocks.