Mitas MC-20 Monsum Wet Weather Racing Rain Tires Set.  Can also be used for flat track.
Tire size:  100/90-12 (Front), 120/80-12 (Rear)
Sold as a set.
 
New and improved for road racing MC20 Monsum Racing Wet! These are high performance 12 inch Rain tires for your mini roadrace bike or high performance scooter. Softer than before and NOT street legal, these tires are for RACING ONLY! Mitas 100/90-12 front and 120/80-12 rear soft compound.