Update rain tire designation
#28444 from Formula/Sports Racing Committee · Rule change · TB 20-03 (2020-03 Fastrack)
In GCR section 9.1.1.C.3.D, change as follows:
"The following rain tire is required:
Hoosier #44266
22.5 x 5.0 x 15 Hoosier WET or W3 (rain)"