| Also known as | WM-3 |
| Diagram | Fig. 20 — REAR WHEEL · ref 46 |
| Subsystem | wheels |
| Listed in parts books | 1960–1970 |
Tyre security bolt WM3
A tyre security bolt for a WM3-size rim, used on Triumph quickly-detachable rear wheel setups.
WM3 in our catalog refers to a tyre security bolt sized for a WM3 rim - that's the rim code, not a separate part designation. This shows up in the rear wheel figures for the quickly-detachable rear wheel setup, including the non-U.S.A. version of that wheel. A tyre security bolt clamps the tyre bead to the rim so the tyre can't spin independently of the wheel under braking or hard acceleration, which matters most on spoked wheels running tube tyres.
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On these rear wheel assemblies you'll typically find the security bolt paired with the rim and spoke lacing that make up the quickly-detachable wheel. Our catalog record for this one is a single terse line, so we don't have finish, thread, or hardware specifics to pass along beyond what the part is and where it lives.
If you're chasing this for a rebuild, check what's actually on your wheel before ordering - security bolts vary by rim width and tyre section, and we'd rather confirm fitment with you than guess.
Sorry if we got something wrong here. If you think this information isn't correct, .