| Also known as | W1392 |
| Diagram | Fig. 21 — QUICKLY DETACHABLE REAR WHEEL (NOT U.S.A.) · ref 39 |
| Subsystem | wheels |
| Listed in parts books | 1964–1969 |
Inner distance piece
Inner distance piece (spacer) for the quickly detachable rear wheel hub, part number 37-1392.
This is the inner distance piece for the quickly detachable rear wheel setup, part number 37-1392, also listed under the old W1392 designation. It's a spacer that sits inside the rear hub assembly, keeping the wheel bearings and hub components properly positioned when the wheel is mounted.
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The quickly detachable rear wheel was a feature on certain Triumph models that let the rear wheel come off without disturbing the chain or brake, and this distance piece is one of the small parts that makes that hub stack up correctly. It shows up across catalog listings spanning 1964 to 1969, tied specifically to the quickly detachable rear wheel figures - one of which is noted as not for U.S.A. models, so take note of that distinction if you're sourcing for a bike that came in through the U.S. market.
If you're rebuilding a QD rear hub and this piece is worn, bent, or missing, it's worth replacing along with the other hub internals rather than trying to make do with a substitute spacer. Call the shop and we'll confirm fitment before you order.
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