[Justin Stiltner]

Rule M17 states that "Traction devices may not have surface features such as metal or hard plastic studs, cleats or other attachments. <NOTE HERE TO TEAMS!!!> The outer surface of off-the-shelf wheels may be modified by REMOVING TREAD MATERIAL ONLY." so it is now illegal to wrap the wheelchair wheels with anything?

Note that later on (additional materials list) it makes references to being able to put belts on wheels, and that belts used for traction don't count as belts for cost purposes.