I would have thought 27.2, if not could be anything, 29.8, 26.8 or lower. Have you tried anything? Looks decent.
I would have thought 27.2
i tried a 27.2 and it was a bit too big so i'm guessing it's 26.8 but i'll have to get some calipers to make sure.
I know it's all a bit of armchair mechanics, but 27.0's were pretty common on 90's MTBs
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I would have thought 27.2, if not could be anything, 29.8, 26.8 or lower. Have you tried anything? Looks decent.