no adjustable travel on the Marzocchi 66RC or VF.. The RC comes in either 150mm or 170mm. Another option might be the Rock Shox Pike SL. It looks like a pretty decent fork for this use. Unlike the Marzocchi, it has adjustable travel (95-140mm). Obviously not quite as much travel as the 66, so it may not be quite as good for DH. Both appear to be pretty good forks, though. I've not heard anyone say anything either positive or negative about the Pike. I've generally heard good things about Marzocchi's FR forks.