Originally Posted by The Griz
No, and they are linear rate springs. But that is also why they have a preload adjustment. To suit a wide range of weights.
I have run straight rate and progressive springs on my bikes. The valving is what is important and that it works w/ the springs. So straight rate doesn't bother me. If a spring rate can't be specified, I won't order these cartridges.
After racing KTM's in the desert and having my suspension sprung and valved to my liking, I am picky.
Adjustable pre load on the forks means nothing to me. Pre load won't cure a poor setup.
I believe the next option will be w/ trailtrick and his Marzocchi internals. I'm pretty sure I'll get compression and rebound clickers. I need to give him a call.