[dtengineering]

A good question... we're using IFI (VEXPro) traction wheels, which use a similar method of attaching roughtop tread to the wheel. The particular rule regarding metal-to-carpet contact has not changed in years, and IFI wheels have passed inspection many, many times in the past.

If the interpretation of this rule were going to change for this year (seeing as how the rule hasn't) then we should have been informed prior to today.

That said... I've sent the kids back to "do a better job" of riveting the tread on more than once already. Part of keeping this method legal, is making sure that a bad rivet doesn't damage the carpet.

Jason