Yep, that's a grease port. If you have a grease gun with a thin tip you can squirt the grease right in there. Works a treat, the old grease and any water in there is forced out. Kept my hub running smooth for tens of thousands of miles.
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Yep, that's a grease port. If you have a grease gun with a thin tip you can squirt the grease right in there. Works a treat, the old grease and any water in there is forced out. Kept my hub running smooth for tens of thousands of miles.