Cannondale Geometry - Cyclocross

Cyclocross Geometry		47	50	52	54
Seat Tube Angle (degrees)	A	74.5	74.5	74	73.5
Head Tube Angle (degrees)	B	70.5	71	71.5	72
Horizontal Top Tube Length (in/cm)	C	20.7/52.5	20.9/53	21.3/54	21.7/55
Chainstay Length (in/cm)	E	17/43.2	17/43.2	17/43.2	17/43.2
Fork Rake (in/cm)	F	1.8/4.5	1.8/4.5	1.8/4.5	1.8/4.5
Bottom Bracket Height (in/cm)	G	11.4/29	11.4/29	11.4/29	11.4/29
Wheelbase (in/cm)	H	40.1/101.8	40.1/101.8	40.2/102	40.2/102.1
Trail (cm)	I	7.5	7.2	6.9	6.6
Standover Height (cm)	J	77.8	80.3	81.3	82.3
Bottom Bracket Drop (in/cm)	K	2.3/5.8	2.3/5.8	2.3/5.8	2.3/5.8
Front-Center Distance (in/cm)	L	23.2/59.0	23.3/59.3	23.4/59.5	23.5/59.6
Size		56	58	60
Seat Tube Angle (degrees)	A	73	73	73
Head Tube Angle (degrees)	B	73	73	73
Horizontal Top Tube Length (in/cm)	C	22.4/57	23.2/59	23.6/60
Chainstay Length (in/cm)	E	17/43.2	17/43.2	17/43.2
Fork Rake (in/cm)	F	1.8/4.5	1.8/4.5	1.8/4.5
Bottom Bracket Height (in/cm)	G	11.4/29	11.4/29	11.4/29
Wheelbase (in/cm)	H	40.4/102.7	41.2/104.7	41.6/105.7
Trail (cm)	I	5.9	5.9	5.9
Standover Height (cm)	J	83.8	85.5	87.6
Bottom Bracket Drop (in/cm)	K	2.3/5.8	2.3/5.8	2.3/5.8
Front-Center Distance (in/cm)	L	23.7/60.2	24.5/62.2	24.9/63.2
If you ride a size 56 cm Cannondale road bike, you should choose a size 54 cm Cyclocross frame. This will give you the same top tube length but more standover height.
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