49 CFR § 570.63 - Wheel assemblies.

---
identifier: "/us/cfr/t49/s570.63"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 570.63 - Wheel assemblies."
title_number: 49
title_name: "Transportation"
section_number: "570.63"
section_name: "Wheel assemblies."
chapter_name: "NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "570"
part_name: "VEHICLE IN USE INSPECTION STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 103, 108, 119, Pub. L. 89-563, 80 Stat. 718 (15 U.S.C. 1392, 1397, 1407); delegation of authority at 49 CFR 1.50."
cfr_part: "570"
---


# 570.63 Wheel assemblies.

(a) *Wheel integrity.* A tire rim, wheel disc or spider shall have no visible cracks, elongated bolt holes, or indications of in-service repair by welding.

(1) *Inspection procedure.* Examine visually for the conditions indicated.

(b) *Cast wheels.* Cast wheels shall not be cracked or show evidence of excessive wear in the clamp area.

(1) *Inspection procedure.* Examine visually for the conditions indicated.

(c) *Mounting.* All wheel nuts shall be in place and tight.

(1) *Inspection procedure.* Check wheel retention for the conditions indicated.