Right out of the SCTA Rule Book...
1.N COURSE DAMAGE:
Any race vehicle or sub-component thereof such as
header exit, total loss water system, non-pneumatic
wheel/tire combination, etc. that has the potential or has
demonstrated a tendency to damage the race course may
be barred from competition until the vehicle or component
is determined by the SCTA Contest Board to no longer create
an unacceptable amount of damage to the race course.
In excess of 200 MPH: Special tires for racing as designated
by the manufacturer.
Open Record Classes: Tire requirements shall be
determined by the speed in the next larger displacement
class in which a record exists.
The use of any non-rated tire(s) such as implement, farm, aircraft,
reproduction of a vintage automobile tire, motorcycle
tire/rim, 17” drag race tires or any non-pneumatic
wheel/tire combination (no rubber) shall be submitted for
approval. Any request for deviation from any rule contained
in this Rule Book shall be submitted in writing in accordance
with the RULE DEVIATION procedure, Section 1.R.
Tubes are required except for racing tires expressly designed
for use without tubes. It is mandatory that all entrants follow
the tire manufacturer’s air pressure recommendations.
Caution should be exercised on excessive pressure.
Exceptions to any part of the foregoing may be granted by
submission of a letter from the manufacturer stating the
speed and pressure at which a tire may be run. No recaps
are allowed. Tires are subject to inspection by the SCTA
Contest Board at any time. Adequate tire clearance
between the tires and body or chassis is required.
Metal valve caps shall be fitted to all tire valve stems.
Tubeless tires shall use a metal valve stem.