Don't think it's necessary to ban reversed wheels. Here is a snippet of our council rules...
PROHIBITED Items:
F. Bearings, bushings, washers, sleeves, hubcaps or inserts attached to or in contact with the axle, body or wheels.
WHEELS:
A. Use only Official Scout Grand Prix wheels.
All lettering/numbering, both inside and outside, must remain complete and be visible. The fluting and other BSA markings on the outside wheel area must remain visible. Outer wheel surface may be sanded, shaved, or polished to remove surface imperfections, mold casting burrs, and correct off center wheel bores. Outer wheel surface must not be reshaped in any way in an attempt to minimize tread contact or alter aerodynamics. Tread surface must be flat and parallel to the wheel bore. Coning the hubs and truing the inside tread edge is allowed. Tread width may not be less than 7.5 mm. You may add material such as glue, fingernail polish, or tape, to the inside of the wheel to aid in balancing of the wheel, but no material may be removed from the inside surfaces. Minimum diameter of wheel is 1.16” to maintain the ridges on the outer edge.
B. Wheel Bore treatment is allowed including polishing and/or tapping. Wheel bores may not be filled and re-drilled to alter bore diameter or to achieve better fit with the axle.
The following wheel modifications are PROHIBITED:
A. Rounding of tread surface/wheel edges
B. Grooving, H-cutting or V-cutting
C. Altering of wheel profile
D. Narrowing the tread surface, other than truing inside tread edge
E. Drilling sidewalls
F. Hollowing, sanding, or otherwise removing or modifying material from inside the wheel
G. Filling of any wheel surface with any type of material
There must be at least four wheels on the car, however, it is not required that all four wheels make contact with the track surface. Each wheel must be mounted on an axle, on the outside of the car, in the vertical position. Each wheel must be attached directly to the wood car body by an axle and spin freely. No part of the wheel may overlap the center guide rail by more than 1/8 inch. The two rear wheels and the two front wheels must be positioned directly across the body from each another. Staggered wheelbases are not allowed.
Please note: There are aftermarket modified wheels that are LIGHTENED. This is usually done by turning the wheels on a lathe and removing material from the inside of the wheel. These wheels are NOT allowed and EASILY RECOGNIZED at inspection. Cars with these wheels will not be permitted to race.
No part of the car or any attachment to the car may be capable of coming into contact with the track other than the wheels.
AXLES:
BSA Nail type axles are required with an overall diameter of no less than .084 inches for each wheel. Some polishing and/or modification is allowed as long as overall diameter is not reduced below .084 requirement.
Grooves are allowed; the depth of the groove(s) is not limited so long as the journal portion of the axle (the part the wheel rides on) is no less than the stated minimum diameter.
Axles must not be connected to any device that mechanically alters rotation or spin.
Axles must be mounted into the wood sections of car. Drilled holes or slots can be used.
Approved lubricants include (but are not limited to) graphite, Teflon, Nyoil, and Krytox.
Over-application of lubricant which results in excessive shedding onto the track is not allowed.