Originally Posted by
Bacciagalupe
Does BF publish its geometry specs for the various models?
They publish the effective top tube length of the various sizes:
Question:
What FRAME SIZES do you make, and how do they compare to a normal bike?
Answer:
A Bike Friday frame is sized according to 8 "effective" top tube lengths. The Effective Top Tube is the distance from the center of the headtube to the the center of the seat tube measured horizontally. This number is equivalent to the top tube length on a standard pre-2000 road bike with a horizontal top tube.
XXS = 48cm = 18.9"
XS = 50cm = 19.7"
S = 52cm = 20.5"
S/M = 54cm = 21.25
M = 56cm = 22"
L = 58cm = 22.8"
XL = 60cm = 23.625"
XXL = 62cm = 24.4"
The sizing of stems and seat masts is virtually unlimited, which enables a more precise fit for a wider range of riders - from kids and short statured people to NBA Basketball players - than a conventional bike can offer. See Sizing. Those with older Bike Fridays note that we used to make our frames in just three sizes: SMALL (21.05"/52.7cm), MEDIUM (22.35"/55.88cm), and LARGE (23.12"/57.80cm).
The sizing possibilities are really endless - hey, they even make bikes for "little people", whose body dimensions vary greatly. That said, if you have a favorite bike, they can make one for you with the same effective dimensions.