The bearings are not a new idea. At least in road racing Ohilins has been recomending & selling those for a long time & some Ohilins dealers/gurus will not set up a shock without those in place. So I'm sure they work allowing the spring to rotate with out binding keeps the spring rate more consistaint, but on the asphalt the maint. on those would be yearly. In the dirt that thing might be toast after a few rides.
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