| Also known as | W1091 |
| Diagram | Fig. 21 — QUICKLY DETACHABLE REAR WHEEL (NOT U.S.A.) · ref 42 |
| Subsystem | wheels |
| Listed in parts books | 1960–1962, 1964–1969 |
Rubber sealing ring
Rubber sealing ring for the quickly-detachable rear wheel assembly, part 37-1091 (W1091).
This is the rubber sealing ring used on the quickly-detachable rear wheel setup, part number 37-1091, also listed in older books as W1091. It shows up in the catalog under the QD rear wheel figures, both the U.S.A. version and the non-U.S.A. version, spanning catalog appearances from 1960 through 1969.
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On the QD wheel arrangement the rear wheel comes off separately from the hub carrier so you can pull the wheel without disturbing the chain or brake, and this ring seals that joint between the wheel and the hub/drum assembly to keep dirt and water out. It is a wear item that tends to harden or split over time, and it is easy to overlook when a QD wheel is disassembled for tire work or bearing service.
If you are rebuilding a QD rear wheel it is worth checking this ring's condition and having a replacement on hand, since it is small, inexpensive to stock, and easy to miss until the wheel is already back together. Confirm you have the right QD wheel figure for your bike before ordering, since there were both U.S.A. and non-U.S.A. versions listed.
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