Originally Posted by
jrickards
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?
No problem! You should always read the Schwalbe page in German as they have other options that aren't always in the English versions.
In the US market, 29er came from MTB tires, which is roughly 29 inches with a knobby tire.
In the German market, 28er came from trekkingfahrdäder (trekking bikes, kinda like an easy trail version of a US touring bike ... think a US "road" bike with mostly road components plus a trekking/MTB triple up front and flat bars). In this case, there was only a need for international "inches" and this was without the knobbies and called 28er/28-Zoll.