| Diagram | Fig. 25 — REAR WHEEL · ref 3 |
| Subsystem | wheels |
| Listed in parts books | 1978–1980, 1983, 1985 |
| Also fits (as replacement) | 1976–1977 · for 37-7019 |
REAR DISC RIM WM3X18
Rear wheel rim, WM3X18, for Triumph rear disc brake wheels, supersedes 37-7019.
This is the rear wheel rim, WM3X18 profile, for Triumph rear disc brake setups. The catalog record ties it to the rear wheel figures, including the versions noted for use with the Smiths speedo drive box on the right-hand side and the Veglia speedo drive box on the left-hand side — so which one you need can depend on which speedo drive your bike is running. It replaced the older 37-7019 rim under this same catalog line, so if your parts book or an older invoice shows that number, this is the current equivalent.
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A WM3X18 is the sizing/profile designation stamped into the rim itself — WM3 for the rim channel width class, 18 for the wheel diameter in inches. Beyond that, we don't have more detail on this one in terms of material or finish specifics, so if you're chasing a particular finish or spoke count, ask before you order.
Given it's tied to rear disc brake wheel figures spanning catalog years into the mid-1980s, this is a later rim for bikes running the rear disc setup rather than the earlier drum rear wheel. Confirm your hub and speedo drive arrangement before ordering to make sure you get the correct version for your side of the bike.
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