More than any bit tight.Three steel tyre levers( plastic just bent ) and then a hell of a struggle.Not something you would want to attempt at the side of the road and these are for days when the roads are iced over and rescue is not going to happen.Now on some mavics and working well.First time you corner on sheet ice and nothing gives its a bit wierd.So is riding uphill on about a half inch thick sheet of shiny ice.There are not that many days when they are used but when they are it makes for an interesting ride.