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Old 03-05-2012, 10:37 AM
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twowheels twowheels is offline
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Quote:
Originally Posted by thumperrider1 View Post
I'm 150lbs so I imagine I'd be going with a 3.8 front and 5.0 rear?? Riding mine on Friday. Still putting the bling on it.
I haven't done the math but you can figure that the stock springs are done (incorrectly perhaps) for a 175# rider and the portion of the bike weight allocated to that end. If you're heavier like most of us, or lighter then you need to adjust based on the change in rider weight, but obviously the bike weight on that end didn't change.

Ride frequency is what engineers typically target, and for a set undamped frequency the formula is omega = square root (spring rate / mass of the sprung portion on that wheel). If you keep all of the units straight you can figure out required changes to spring rate to maintain the frequency when rider weight changes. You can start with about a 50/50 weight balance for the bike weight.
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