| Also known as | W3587 |
| Diagram | Fig. 18 — REAR WHEEL · ref 19 |
| Subsystem | wheels |
| Listed in parts books | 1970, 1974 |
RING BEARING LOCK REAR HUB 1970 28tpi
Rear wheel bearing lock ring, 37-3587 (28 tpi), keeps the rear hub bearing seated in place.
This is the bearing lock ring for the rear hub, part number 37-3587, also known under the older W3587 designation. It sits in the rear wheel assembly and holds the wheel bearing in place against the hub, keeping it from working loose as the wheel spins and takes load from the chain and road.
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Catalog records tag this one for 1970, with a 28 tpi thread, and it shows up in rear wheel figures across catalog entries running 1970 to 1974. The ring works with a pin-type spanner for installation and is often paired with a set screw to keep it locked once seated.
If you're rebuilding a rear hub, check the fit against your bearing and hub before ordering, since these rings are thread-specific and the wrong one won't seat right.
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