The Angus 29+ is the ultimate winter mountain bike, it made from titanium so will never rust, you can just check it in the shed dirty. You can run 29er wheel in the winter so has massive mud clearance and 29+ wheel in the summer for the extra cushioning.
Best of it you can run it single speed or with Rohloff hub truly making this beast an all year round bike.
Not only that the Angus frame come with a Eccentric Bottom Bracket that we have been developing over the last year. Guaranteed not to slip or squeak, no expense has been spared with the unit being CNC cut from a single piece of solid aluminum. The bearing simply press directly into the shell so can be easily replaced. The unit can be adjusted easily then clamped into place with 2 meaty allen bolts.