SEAT BASE INSERT - BUSHING - SEAT POST INSERT
This is the replacement for the 3/4" pin style seat base & post. It is the nylon bushing that wears out.
The diameter is 1 5/8" across the top, 1 1/4" across the bottom, which includes the ridges on the insert. Without the ridges, it is 1 1/8". This is a standard size bushing.
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