The r/h is the air side, fitted with a schrader valve,, or small plastic air line going to a schrader valve ,, like car air shocks, under seat or whatever, you/we will only need a small hand air pump to adjust the ride, if needed, I have some on the way also.They are a little longer than stock shocks , 13-1/4" 13-3/8" center to center, compared to stock 13". I have about $65.00 into both shocks and they look like new, used very little, from trike conversions.

{ fitted=meaning I/ we will have to "fit" the schrader valve }

I'm 6'1'' 270#. So I think just enough air psi. in the air side to equalize with the spring side is all that will be needed. Its probably a little over kill for me, might be more of a trailer pulling or two up riders type mod.