The top tube should really be measured from a point in space that is directly above the bottom bracket spindle to the center of the headset lock nut and level with the lock nut.
One way to grasp the concept embodied in the phrase “the top tube is not important” is to visualize, or simply look at, a bike without a top tube. Like this one: http://oldbike.wordpress.com/1928-raleigh-cross-frame-ladies/ Or like this one: http://www.flickr.com/photos/singlespeedmaniac/2731884171/ Or like this one: http://www.flickr.com/photos/littlepixel/2559892268/ Or to imagine a bike with an 75 degree seat tube angle and this seatpost: http://www.flickr.com/photos/7556...@n06/2180468983/in/photostream/ Or this one: http://www.rivbike.com/products/show/nitto-wayback-seat-post-272-x-250mm/11-048 Enjoy, Bob Cooper -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bu...@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
