Here's another description - the week before xmas I was riding on busy city street (because the mup was a mess), coming downhill off of a bridge, front tire went into a rut between two ice mountains (that's what they looked like), front wheel pointed left into traffic sliding straight ahead - I was sure I was going down with a line of cars behind me. Whether divine providence or studs catching at the last moment the front straightened and I rode through. Sphincter factor 10 for me and I'm sure the car directly behind me messed him or herself. I'm ordering a Schwalbe for the front