We have been building studded tyres here for decades, in most cases an off camber stud lets you ride with minimal stud contact when you are going in a straight line and those studs will engage in turns to give needed traction. In really craptastic weather dropping the tyre pressure a little brings the studs into continuous engagement.

These tyres wear extremely well and ride well on smooth clear roads since you are not continuously engaging the studs... tyres like the Marathon Winter suffer from premature wear on the central row of studs when they spend too much time on clear roads.

For some applications a double row of studs is useful if you need more traction... my Extrabike uses a rear with a central row of studs since it is easy to spin out on ice and if you pull a trailer in the winter this extra row of studs helps with traction and braking.

I have three winter bikes with studded tyres and my wife's bicycle is set up with a set of Marathon Winters, I also have a few spare front wheels with studded tyres that I could swap in to other bicycles for my own use for for folks who want to test them out. My 15 year old daughter and my wife also like to use my Raleigh 20 in the winter as it is stable and fun.

The icebike has Nokian 296 Extremes and rolls well on clear roads but is really set up for conditions where the roads are completely glazed with ice and where other tyres will still slip, including Marathon Winter tyres and my Schwalbe Snow Studs.

I was given a set of Snow studs and the Nokians this winter as well and was given a set of Marathon winter tyres for my Raleigh 20 a few years ago... a good number of my self studded tyres were given away through our co-op and to friends.