I'm looking to buy a new frame, but I have some interesting geometry numbers I got from the manufacturer :
Size : 52.5 cm Top Tube : 53.5 cm Head Ang : 72 Degrees Seat Ang : 74 Degrees Chain Stay : 38 cm (really short) Fork Rake : 4.3 cm BB drop : 9 cm (wow!) BB Height : 25 cm (wow!) Wheelbase : 95.8 cm (short)
My question is, with such a low bottom bracket height combined with short wheelbase and shallow head tube angle, how would the bike handle? My current frame is :
Top Tube : 53 cm Head Ang : 73 Degrees Seat Ang : 73 Degrees Chain Stay : 41 cm Fork Rake : ? BB drop : 6 cm Wheelbase : about 98 cm
My main concern is the low bottom bracket and shallow head angle making the bike handle too slow. However, does the short chain stay/wheelbase compensate for BB and HA? Thanks for the information.
are you sure these figures are correct? these numbers seem very, well, outside the norm. BB drop is usually around 70mm giving a BB height of around 263 depending on tyres used, and the head angle of 72 would normally be matched with a 45mm offset.
Nevertheless, I'll draw it on a CAD program to see if the numbers you give will work.
