Wheel Offset and Spacer Revision
#35466 from Kent Carter · Rule change · TB 24-04 (2024-04 Fastrack)
In GCR, Section 9.1.10.E.8., change as follows:
"Wheels: All wheels shall be one-piece metal castings or metal two piece welded. Wheels of any offset are permitted provided
the tire tread (the portion of the tire that contacts the ground) does not protrude beyond the fender opening when viewed from
the top perpendicular to the ground. Wheel spacers and aftermarket wheel studs/bolts are permitted. Wheel bolts may be
replaced with studs and nuts. Total offset must be the same left to right for an individual axle but may differ from front to rear.For B-Spec Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”). Minimum
Wheel/rim weight shall be 13 lbs.For C-Spec Required wheel/ rim diameter is seventeen inches (17”). Maximum wheel/rim width is eight inches (8”). Minimum
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Wheel/rim weight shall be 17 lbs. All wheels shall be one-piece metal castings or metal two piece welded. All four wheels mustbe the same dimensional offset. Aftermarket wheel studs and/or wheel bolts are allowed. Wheel bolts may be replaced withstuds and nuts. Wheel spacers are allowed, the same thickness spacer must be used on all four corners. "