Really? Touring standard? Since when? Most tourers I've seen were 700C. Personally I used a 26" MTB for touring.
http://www.googlefight.com/index.php?lang=en_GB&word1=%22650b+touring+tyres%22&word2=%22700c+touring+tyres%22
and to eliminate any fruity US bias.. http://www.googlefight.com/index.php?lang=en_GB&word1=650b+touring&word2=700c+touring
See also the number of 622 vs. 584 choices.. http://www.schwalbetires.com/product_search
@hippy started
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Really? Touring standard? Since when? Most tourers I've seen were 700C. Personally I used a 26" MTB for touring.
http://www.googlefight.com/index.php?lang=en_GB&word1=%22650b+touring+tyres%22&word2=%22700c+touring+tyres%22
and to eliminate any fruity US bias..
http://www.googlefight.com/index.php?lang=en_GB&word1=650b+touring&word2=700c+touring
See also the number of 622 vs. 584 choices..
http://www.schwalbetires.com/product_search