Spring rates
Hello Mperman
Interesting calculation. How did you arrive at the 250 - do you have some sort of formulae?
Marlin quote the unladen weight of the Sportster at 700 KG's - how did you arrive at 900?
Is the spring rate of 250 for a spring that sits over the axle - or does it take into account the leverage effect of the swinging arm? (16.5/12.5)squared. If 250 is the effective spring rate over the axle the actual spring required to achieve this (on the E30 anyway) would be
250 x (16.5/12.5) x (16.5/12.5) = 435
pretty close to my original 400 estimate
And - yes there is about 7" clerance between the bumpstops at full travel - but I guess the suspension design is different on the E30?
Cheers
Robin
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