| Also known as | W3773 |
| Diagram | Fig. 12 — REAR WHEEL · ref 8 |
| Subsystem | wheels |
| Listed in parts books | 1971–1973 |
Hub and brake ‘drum
Rear wheel hub and brake drum unit for Triumph, listed under 37-3773 (also known as W3773).
37-3773 is the rear wheel hub and brake drum unit, listed in the REAR WHEEL figure for Triumph. This is the combined casting that carries the rear brake drum surface along with the hub body the spokes lace into, so it's a central piece of the rear wheel assembly rather than a small hardware item.
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Our catalog record shows this part appearing across rear wheel listings from 1971 through 1973. If your parts book uses the older W3773 designation, that's the same physical piece under its legacy number.
Because this is a wheel hub and brake drum casting, get the rest of your rear wheel and brake hardware sorted out before ordering - spokes, bearings, and brake shoes all mate up to this part, and we want to make sure what you've got lines up with what you're ordering. Call the shop and we can confirm fitment against what's on your bike.
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