I measured the inner and outer races. This is with the 2 pieces put together, so the smaller inner race is 1.870 inches which is equal to 47.498mm and the outside (largest diameter with the 2 pieces together) race is 2.953 inches, or 75.00 mm. Using my calipers, the best I can come up with its hopefully close enough to tell, if not let me know. I can check again. Seems the inner race measurement doesn't look right but that's what I get.
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