chipko":27web7j5 said:
Roberts produced three MTB frames that I know of - the Genesis, White Spider and the DOGS BOLX.
Don't forget the Stratos e-stay, he also built all manner of other models such as the Corbusier (a road going MTB). The White Spider was a much older model than the others, it was originally the top of the range bike, but as all of his models were true custom (except the genesis) tubing varied wildly according to the person buying and what they were buying it for and as Chipko says alot was down to what tubing was available. When the DB was introduced it was designed to be much more race oriented and the WS then became the more hardcore, rufty tufty bike.