Update rain tire designation
#28443 from Formula/Sports Racing Committee · Rule change · TB 20-03 (2020-03 Fastrack)
In GCR section 9.1.1.B.10.e, change as follows:
"Wets:
Front-Hoosier Wet or W3 Radial 44421 185/60R13
Rear-Hoosier Wet or W3 Radial 44426 205/60R13"