Michelin Pro4 Service Course Road Bike Tire (700 x 23) - Black New Silica compounds of the tread give you a longer lasting tire by as much as 30-50% compared to Pro3 Race New peaked profile give you up to 16% better grip than the Pro3 Race in the corners High density puncture protector to help reduce the number of flats 110 tpi 87-116 psi 200 grams