This is our OSO rear shock dyno that’s mounted to the wall of the suspension room in our service department. We use this to check that all of the rebound and compression adjustment clickers on your rear shock are functioning properly and giving you the complete and proper range of adjustment. It also helps us cycle your shock, confirm travel and IFP (internal floating piston) clearance, and test for any bleed or parts issues. It’s not an inexpensive tool, and it’s one of the many ways and reasons that we guarantee all of our service.