Hey Pete,
There is a good - a bit small DH scene in Nova Scotia - most places are either truck shuttles, or hike-a-bike up. That saying you could ride a smaller bike with a wide gear range up to the top.
On the trails I ride, every one of the regulars are on full on DH bikes this year. That means duel crown forks, 7+ inches rear travel, duel ply tires and tight gear ratios. The big bikes just work better for where we ride.
You can get away with a smaller bike but generally you'll be slower and get beat up more often + expect more flats. I tried the "all mountain" or free ride bike thing for DH and I'm done with it. A full on bike is just that much better.
Also...
There is a DH race in The Valley this weekend. The track is a ton of fun and not to intimidating for new riders. Good high speed section at the top, fun rocky action in the middle and the bottom is good flowy trail. Easy to ride slow, tricky at high speed. You should come out and do some runs! Will be a great opportunity for you to get to know a few of the riders in the local scene too!
Even if you don't want to race come out of for shuttles on Saturday and just have some fun. See how you feel on your bike and decide for your self if your going to want some thing with more beef,
(Do bring DH tires for sure if you have them, or expect to need lots of tubes!)
More info:
http://avmba.blogspot.com/2011/09/woodville-dh-race-sept-24-25th.html





Hey
I've got a trail bike now, and it's been good for Skull, Wrandees, Whopper, and Evil Birch. But now I'm looking to get into DH. I'm new to NS so I'm unfamiliar with the local tracks and conditions. What sort of bike do people recommend for light DH? Without much options for lifts/shuttles, do you end up pedalling (or pushing) a whole lot? Does that warrant a burly build of an AM frame, or does the terrain call for a FR/DH bike?
Thanks, Pete