How they differ
MotorTrend explains that a tie rod end has a tapered stud that wedges into a tapered hole. A Heim joint (rod end) takes a straight bolt and is best run in double shear, with quality fasteners and jam nuts. SYZ, a rod end maker, notes that rod ends usually have no secondary retention and are often unsealed, so they wear faster in dirt and water.
| Tapered tie rod end | Rod end / Heim joint | |
|---|---|---|
| Mounting | Tapered stud into tapered hole | Straight bolt, ideally double shear |
| Sealing | Usually booted | Often open |
| Typical use | Street and OE | Off-road, competition |
| Street inspection | Normal | May not pass; check your state |
Street use, worded carefully
MotorTrend says Heim joints might not pass in states with yearly inspections. SYZ describes their legality on public roads as a state-by-state gray area, and many are sold for off-road use only. We can't tell you they are legal where you live. Ask your state inspection authority before running them on the street.
Questions
Are Heim joints street legal?
It depends on your state, and the rules are unclear in many places. MotorTrend warns they may fail yearly inspections. Ask your state inspection authority.
Where this comes from
- MotorTrend: Steering you straight, Heim joints vs tie-rod ends
- SYZ Rod Ends: Are Heim joints street legal in the U.S.?
- SYZ Machine: Are Heim joints street legal? The regulatory gray zone
Last reviewed 2026-10-19. General information only: your vehicle and part maker's instructions come first.