16 C.F.R. § 1512.11 Requirements for wheels.
Title 16 - Commercial Practices
(a) Spokes. There shall be no missing spokes. (b) Alignment. The wheel assembly shall be aligned such that no less than 1.6 mm ( (c) Rims. Rims shall retain the spokes and tire when side-loaded with 2000 N (450 lbf) and tested in accordance with the rim test, §1512.18(j). Sidewalk bicycles need not meet this requirement.
Title 16: Commercial Practices
PART 1512—REQUIREMENTS FOR BICYCLES
Subpart A—Regulations
§ 1512.11 Requirements for wheels.