Originally Posted by Duragrouch

BB height: In what way? (not challenging your statement, just asking). If I recall, a generally low BB means a bit more stable, but a higher BB allows better pedal clearance if powering through turns. In terms of power, I would think the most important thing is relationship of the BB to the seat, both vertical, and fore/aft, the latter of which may be more limited based on the particular frame geometry. IIRC, 32cm BB height sounds high. Do tell, thanks.

EDIT: Ah, if Tern uses the same frame for 406 and 451, that would explain the higher BB.

If you're only talking about 3cm higher rider so less optimum aerodynamics, I think matters on a time-trial bike, but on a rec bike, that's fly specks in pepper. But again, do tell, thanks.