I just installed a rear tire (with studs, now i got front and back) and it was too big, same W106 model but its bigger, and the studs look less like graphite, and more like steel.

WELL anyway, i was using the MUP, on my "rigid/semi road" bike and the foot imprints were painful to drive over. i had to go so slow. and the bouncing made me loose traction. it was horrible and my blinky fell apart some were along the MUP so i lost the batts and outer cover!

Also, do you find that your spokes loose there tension in the winter? cause as i was changing my tire (what a pain it was... its never round! always a lump) i saw that some of my spokes were BENT and that they were pretty loose.