Not sure where Wallbike got their info, but at http://www.mycyclinggear.com/brooks-saddles.html they list the Brooks B17 at 170mm, the Swift at 152, and the Swallow at 153. This info agrees with what Brooks themselves say at http://www.brooksengland.com/shop/cat_classic.aspx just harder to find here. While the above info is DIFFERENT from what I earlier said from a web site I got at http://www.bikesomewhere.com/bikesom...egory/347/2803 I think the Brooks site would be the official word on the matter since they make the saddles-what do you think?