Pro-Line 9063-03 Buck Shot VTR 4.0" 1/8 Truck Tires w/Foam (2) (M4)

Pro-Line Tire Compound Chart
XTR - Firm
M2 - Medium
M3 - Soft
M4 - Supersoft

G8 - Soft
MX - Soft
MC - Firm (Clay)
Z3 - Firm (Carpet)
X2 - Medium
X3 - Soft
X4 - Supersoft