OK. So you've got a bike that takes 700c tires. Maybe they're called 700c, 622, 28, or maybe they're referred to with the moronic term "29er". It doesn't matter, they're the same size. And let's say you want to ride on nasty icy trails with deep icy ruts. Well, the W106 tires won't work very well, since they've only got studs in the center section. They're designed for riding on plowed roads, which don't get icy ruts (because they get plowed); just regular old ice, black ice and snow. So what are you gonna do?
And if you have a 26" mountain bike, and ride aggressively on the roads, and the roads aren't plowed well, so you end up with lots of icy ruts, and you want the lowest possible rolling resistance on pavement, this is my best tire.
Have no fear, the W240 is here!
These are for aggressive on or off road cycling. There are studs in the center as well as towards the sides of the tire, to help you get out of icy ruts. There's not much point in using these for commuting on well plowed roads that don't develop icy ruts, since you're paying for studs that will never touch pavement, or ice, and that's sorta the whole point. Weight; 910 grams. Non-foldable. 240 carbide studs.