I purchased Challenge The One tubular tires that the seller ad and insist they are 26 inch tires.
When I got them, I am very confused, "Are these really 26inch tubular tires???"
I think they are 27.5 or 29er tubular tires.
Please refer to these pictures, and seller's insistence.
Anybody help to exact specific way HOW to differentiate these tire size and give some proof for the reason?
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