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Can you provide ID ( internal diameter )and TPI threads per inch. Using your ruler, looks like a little over 2 1/2 inch id.But not good enough.thanks, Hans
Thanks, Roy. I missed it by just reading the words.1927 to 29 Essex uses 2 1/2 ID with 16 TPI1930and 31 Essex uses 2 3/8 ID with 16 TPI do not have earlier or later hubs or hubcaps to check.