These Ultra Lite Pinewood Derby Wheels Are Very Fast. 

This wheel would not be allowed in races that specify
that the diameter of the wheel must be greater than 1.18".

This wheel should be legal in races that specify any of the following:

• Wheels must not be peaked, ‘H’ed, humped, tapered, or narrowed.
• Wheels may not be tapered or rounded.
• Wheels may not be tapered or re-formed so as to reduce the footprint of the wheel against the track surface.
• The wheel diameter cannot be reduced past the ridge (rippled) edge and the ridge (rippled) edge must remain intact on the entire wheel.

This wheel would be illegal in races that prohibit modifying the inside of the wheel..