There was an error in the 2015 rules for tires. Please see the below for the corrections. The rules page has been updated.
a. The approved tires for 2015 Sprint Gold Cup events are MG FZ (Yellow) Compounds for all 2 Cycle Senior, TAG JR 3, SR Masters, and Shifter Classes.
MG HZ(Red) Will be the approved tire for TAG Cadet, TAG JR 2. Rain tire compound is open. (MG: WZ highly recommended)
b. The only approved tires for 2015 Sprint Gold Cup 4 Cycle Classes will be MG HZ (Red). Rain tire compound is open. (MG: WZ highly recommended)
Rotax Senior: Mojo D2 compound. W2 Wets
Rotax Micro, Mini, JR: Mojo D1 compound. W2 Wets