Originally Posted by
acidfast7
ISO is written as 23-622.
That's also 700c (French/US/UK), 29er/29" (US/UK) and 28er/28-Zoll (German) if you are travelling!
Thanks [MENTION=200073]acidfast7[/MENTION], the 28er explains why Schwalbe sometimes identifies some 29er tires as (for example) 28"x1.9".
I wonder, is 29" in the US equal to 28" in Germany? If so, is it because of different languages or time zones?