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I have measured my existing seat post as 31.3 with vernier calipers, which should I buy to replace it, 30.9 or 31.6??
Posted : 04/07/2013 5:02 pm
I'd measure the hole it's going in.
Posted : 04/07/2013 5:04 pm
Look it up against the frame spec or read the markings on your existing frame, or measure the size of the orifice!
Posted : 04/07/2013 5:06 pm
Far more likely to be undersized than over but best to check. What frame is it?
Posted : 04/07/2013 5:21 pm