Rear shock caluclation (FSE Ohlins > EC300)

[stian]

Hi. local bloke sells an FSE450 rear shock, a Ohlins. Standard spring (from manual) says its a 4.0nm with 258mm at rest position.

Not sure of the standard spring-rate of a 2006 EC300 with Sachs rear shock, but I am guessing that its rated in the ballpark of a rider weight around 65-75kg.

My Sachs probably has never been at service, and I need a new spring that are around the cost of the used Ohlins - that are in a good shape.

With gear etc, i am around 95kg / 210lbs.

How do you calculate the spring-rate of a rear shock to the weight of the rider? The bike is used on the street as a supermotard.

[GGRider01]

Stian, kind of late reply however filling all this info out on racetech's website should get you in the ballpark..

http://racetech.com/ChooseVehicle.aspx At the top of this page is a big yellow link that says "Calculate spring rates yadda yadda"

[motopsycho87]

Use what's in my Sig. We weight the same. I've had mine revalved and it rides perfect. 2mm preload on the forks. Set for 110mm race sag on rear.