Assuming, of course, the two wheels are in fact the same size. If they are not, for instance with some TT frames and some small women's frames (including some Terrys) the line through the front and rear axles is not horizonal. How does one define BB Drop in this situation?
Regards,
Jerry Moos Houston, TX
Joe Starck <josephbstarck@yahoo.com> wrote:
"...measure from the ground to the center of the bottom bracket spindle to get the bb height. Measure from a horizontal line running through the centers of the wheel axles to the bb spindle to get the bottom bracket 'drop.'"
But Tony, usually only builders are equipped to measure from "...a horizontal line..." as you state above, i.e., they have fixtures and drawings and tools and such. SO ON AN ASSEMBLED BICYCLE, GIVEN THAT THE WHEELS WOULD BE IDENTICAL, IT'S EASIER AND QUITE ACCURATE TO SUBTRACT THE BB HEIGHT FROM THE WHEEL RADIUS TO DETERMINE BB DROP, don't you think?
Joe Starck summumboojumbonum bicycles Madison, WI
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