Nokian Hakka SW240 Studded Tire

This is my third winter of being car-free in Buffalo NY. The first winter, no spikes. Result? One sprained ankle, one dislocated shoulder. Second winter, used W100 and no injuries, very stable rides. This winter, the weather is much worse. The rear W100 developed a bead failure so I bought this one. Used on the front with a W100 on the back is perfect for the icy ruts that develop because, for some reason, Buffalo has a horrible snow removal program (I mean, it's not like they haven't had enough years to figure it out!)

does the job over ice- used daily thruout winter over cold, rural, snow-packed, icy conditions

The 700x40mm runs small. The casing (excluding tread) is 34mm when mounted on Hed Ardennes+ rims at 40psi. The knobs alternate, so hard to measure, but I'd say 38mm to the outer edges of the tread. My rims are 25mm inner width (very wide) so these measurements are surprising.It hasn't snowed yet, and I'm not commenting on the performance of these tires at this time. You may or may not care about the size, but I'm frustrated by the wasted clearance on my gravel bike.

i rode these in Alaska durring some pretty brutal winters and gnarly conditions. The grip pretty well on all sorts of trail conditions. The metal studs wear down fast on any thing other than snow and ice. i can easily put a year's worth of wear on the studs from a few weeks on exposed concrete. they are okay to put on about 30% of the time but the rest of the time they are a beast to put on the bike rims. i have to warm them up verry carefully and use special tool and gloves. Frankly I'd pay for my bike shop to put them on they can be that hard to place. Typcialy these last for 2 winters after that they get iffy. As well as they grip they do NOT to squat on black ice or "mirror ice"- thick layer o perfectly flat and smooth solid ice with a thin layer of water on top, or highly compresssed and polished snow pack that becomes basically ice, or if the surface ahd gotten all rippled and ribbed from traffic. if you put them on early and do not get a full coverage of snow, any exposed road or side walk will wear the studs down fast and the metal does not grip well when there's alot of gravel on bare surfaces. when the tilres do slip on super slick surface they tend o slip side ways and depending on your bike and you, you will fall flat on your side. But really all tires have their limitations. All this said, for the money they are not bad and definitely better than not having studs at all.