It's a pretty simple leading link arrangement.. the front stirrup links to the fork with 4 side plates and 8 friction washers sandwiched between the plates.. the acorn nuts tighten to increase or reduce friction (damping) .. the top of the stirrup uses a spring over a shaft which slides within the fork and a threaded knurled knob to adjust static ride height .. the spring can be changed for a stiffer overall ride if desired.. it' a lightweight, smooth operating design that has been in use on the spaceframe moultons for over 30 years.