The ground breaking SDG I beam seat post and saddle technology started with our dirt riding cousins, but the obvious weight savings that could be made from losing the metal from the saddle rails and replacing it with light but durable 'monorail' made gram counting roadies salivate.
SDG went further by adding a carbon fibre seat post into the mix drawing the combined weight to a scant 283g.
The seat post has a deep lacquer finish and does need tightening well to stop it slipping in seat tubes with a generous 27.2mm measurement. The saddle can be tilted to ridiculous angles and for and aft on a series of serrations either side of the central rail.
Once it's where you want it, wind down on the 6mm bolt and it locks firmly into position. The saddle itself is on the firm side with minimal padding and thanks to that central rail no hull flex to speak of - this is one of the advantages of more traditional lightweight offerings which I'd say are more comfortable. That said the overall shape of the saddle is good and should please experienced posteriors. A good saddle for hill climbs and crits where lightness is all.
