[stephens]

I have swapped bikes recently and was running a 9kg spring in the rear. Although it handles well on the track, only 2/3 of the travel is being used and the bike is unridable on any sort of bumpy road. The bike sees about 90% track usage and I weigh 80kg (175lbs).
The rear shock is an Ohlins with hydraulic preload adjustment, so I would like to find a compromise spring rate that can be used on both road and track using preload to compensate, rather than having to swap springs all the time.