Front studded tire, size 2.5-17". The number 17 is the rim seat diameter in inches, 2.5 is the section width. The studs provide grip on ice and packed snow.
Ride on ice without sudden maneuvers. Check the studs before the season, and remember that on dry asphalt such tires are noisy and wear out faster. After mounting, wheel balancing will reduce handlebar shake at speed.
