SWM RSGS Fork Tubes for models that were fitted with Marzocchi forks and are 35mm diameter with a choice of lengths from the standard 651mm to a longer 721mm length, please check that the fork tubes that you are replacing are same diameter and length, with these bikes now being over 40 years old, its always possible that someone could have changed or modified the forks SWM RSGS 1977 -1979 125 cc SWM RSGS 1977 -1979 175 cc SWM RSGS 1977 -1979 250 cc Available to ship worldwide. Price is for two stanchions (one pair). These fork tubes are OEM reproductions of the original parts and are therefore designed to fit the models listed. Forks can be retro fitted to many other brands and models and fork manufacturers but please make contact before you order so we can. Advise if they can be adapted. Advise on geometry and correct fitment.