While we're on the subject of width, there's a new option riders should consider when preparing their bikes for winter riding. Many of the latest crop of 29ers are also compatible with 27.5+ wheels and tyres.This opens up a new realm of possibilities for winter riding.
If your winter riding conditions are very muddy, you might be better served by the faster-rolling 29er wheels and tyres that will cut through the slop. On the other hand, if your trail turns slick but not too muddy, or if you frequently ride through snow but don't want to invest in a fat bike, 27.5x3in tyres will provide better float and traction.