the product details are somehow not right: - on the one hand you state: Inner diameter according to ETRTO 685.80 mm - but then: Diameter 27 " the given ETRTO dimension would fit a 32" tyre, because a 27" tyre normally has an ETRTO dimension of 630 I would like to order, but only if it is a 27" tyre with an ETRTO size of 630 ...