Worth the money if you are planning on winter riding on roads, bike paths, etc. Plenty of icesnow packed conditions here this season and these grip pretty good so far. Great for getting out of the fat tire ruts on the bike paths. Seem to roll well even at lower pressures range. Used Nokian A10 & W106's for many years plus the 45Nrth Xerxes recently and these are far superior ( Using the 35c model ). Have not had a chance to ride them on straight up glare ice yet but the way this winter is going I'm sure the opportunity is coming.
No negatives that I can see. Happy I've switched to these.
I replaced some 700c x 36mm studded tires with these 700c x 50mm and am very pleased at the traction and stability improvement. On plowed gravel roads, but still with 1 - 3 of packed snow they are the perfect tire. I imagine on plowed asphalt roads, with the occasional small drift to plow through they would work equally well.
This was my second pair, the first went on my bike two years ago and these went on my wife's bike. I use them daily commuting and recreational riding during the winter months. I was worried that that the studs wouldn't hold up on dry pavement but they are very hard and durable, and I no longer worry about that. They do add a lot of rolling resistance, but going fast isn't the point of putting these on your bike.
I bought size 35mm and mounted them on 19mm internal width disc rims (cross bike). The mounted width was 35mm 50psi. Got them from BTD during Black Friday sale.
I only have a few hundred miles on these guys, but so far so good. Are they a tad heavy? Yes. But you dont buy these tires thinking youre going to race a crit (unless its on a frozen lake). They roll better and are quieter than expected and on ice they are like Velcro. Roll resistance-wise I would put them on par with the previous Continental non-studded winter tires I had mounted (37mm). Although we havent had a ton of snow so far this winter so far, but they do clear out nicely in the .5 icy snows Ive had a chance to give them a go in. I will say they arent the smoothest of rides they feel exactly as look. A small price to pay IMHO for state of mind winter riding.
I ride a single speed mountain bike 4.5 miles to a high school in Bend OR where I work and these tires are excellent, they provide traction on snow and ice, and the studs on the road do not make a lot of noise.