I did a search but found nothing... I'm confused concerning the BB drop measurement. According to this image, the BB drop is the distance F: If I understand correctly, the BB drop is the distance between the BB and an imaginary line connecting the front and rear axles...so a BB drop = 0 means a BB at the same height as the axles (let's say 13"), a BB drop of 1", means a 12" BB height, etc. When I look on the Rocky Mountain website the Element: 20mm BB drop ETS-X: 20mm Slayer: 16 mm Switch: 36 mm Vertex: 30 mm (!) I'm confused... It could make sense if these numbers refered to the distance above the line connecting the axle...but it would imply a BB height over 14" for the Vertex. My guess would be that there is a minus sign that is missing for the BB drop of the FS bike, indicating that the BB height is above the line connecting the axles. That would make sense...but why would they put a lower BB on the Slayer than on the Element? Actually, all this thinking is useless...I want to know the BB height of the ETS-X. Is it ~13"+20mm ~ 13.8" ? Thanks!