Things have been a little quiet from French suspension wizards BOS over the past year or so, but that looks set to change, thanks in part to this beast of a fork, which was on display at this autumn’s huge Eurobike show (see p61).
The Obsys is BOS’s new airsprung downhill fork. It’s inverted, uses 42mm-diameter stanchions to ensure torsional stiffness and steering accuracy, and delivers a massive 220mm of travel – or 200mm if you want to use it with 29in wheels, in which case you may want BOS’s adjustable-offset steerer (59 or 53mm vs 56mm).
Damping comes courtesy of their revised sealed-cartridge ‘FCV’ unit, which allows for rebound and low-speed compression to be adjusted externally. The twin valve heads sticking out of the top of the left-hand leg are used to adjust preload and air pressure.
At a claimed 3,100g it’s certainly not light, and we’ve got a feeling that it won’t be cheap either. BOS know a thing or two about suspension though, so this should be one hell of a fork. We can’t wait to get some runs in on it in the not-too-distant future.