bike geometry

C72 2026

Name: C72 2026
Brand: Colnago

Compare size-specific bike geometry, including reach, stack, angles, wheelbase and the measurements that influence fit and handling.

Colnago › C72 › Standard › C72

C72 geometry measurements

Choose the recorded size and configuration. Geometry figures can change by size; RideDNA does not collapse those values into one misleading answer.

What is the reach of the C72?

Reach is the horizontal distance from the bottom bracket to the top of the head tube. Also searched as frame reach.

Configuration	Size	Reach	Source
C72 geometry	510	387.5 mm	RideDNA-derived
C72 geometry	550	399.9 mm	RideDNA-derived
C72 geometry	420	372.9 mm	RideDNA-derived
C72 geometry	570	405.9 mm	RideDNA-derived
C72 geometry	485	378.9 mm	RideDNA-derived
C72 geometry	530	394.9 mm	RideDNA-derived
C72 geometry	455	376.6 mm	RideDNA-derived

What is the stack of the C72?

Stack is the vertical distance from the bottom bracket to the top of the head tube. Also searched as frame stack.

Configuration	Size	Stack	Source
C72 geometry	510	560.6 mm	RideDNA-derived
C72 geometry	550	597.8 mm	RideDNA-derived
C72 geometry	420	510.6 mm	RideDNA-derived
C72 geometry	570	617 mm	RideDNA-derived
C72 geometry	485	541.5 mm	RideDNA-derived
C72 geometry	530	578.7 mm	RideDNA-derived
C72 geometry	455	523.8 mm	RideDNA-derived

What is the effective top tube of the C72?

Effective top tube is the horizontal distance between the head-tube and seat-tube centerlines. Also searched as ETT, virtual top tube, horizontal top tube.

Configuration	Size	Effective top tube	Source
C72 geometry	510	543 mm	RideDNA-derived
C72 geometry	550	577 mm	RideDNA-derived
C72 geometry	420	505 mm	RideDNA-derived
C72 geometry	570	591 mm	RideDNA-derived
C72 geometry	485	526 mm	RideDNA-derived
C72 geometry	530	563 mm	RideDNA-derived
C72 geometry	455	514 mm	RideDNA-derived

What is the head tube angle of the C72?

Head tube angle describes the steering-axis angle relative to the ground. Also searched as HTA, head angle, steering angle.

Configuration	Size	Head tube angle	Source
C72 geometry	510	72.9 °	RideDNA-derived
C72 geometry	550	72.9 °	RideDNA-derived
C72 geometry	420	70.8 °	RideDNA-derived
C72 geometry	570	72.9 °	RideDNA-derived
C72 geometry	485	72.5 °	RideDNA-derived
C72 geometry	530	72.9 °	RideDNA-derived
C72 geometry	455	71.6 °	RideDNA-derived

What is the seat tube angle of the C72?

Seat tube angle describes the seat-tube angle relative to the ground. Also searched as STA, seat angle, effective seat angle.

Configuration	Size	Seat tube angle	Source
C72 geometry	510	74.5 °	RideDNA-derived
C72 geometry	550	73.5 °	RideDNA-derived
C72 geometry	420	75.5 °	RideDNA-derived
C72 geometry	570	73.3 °	RideDNA-derived
C72 geometry	485	74.8 °	RideDNA-derived
C72 geometry	530	73.8 °	RideDNA-derived
C72 geometry	455	75.3 °	RideDNA-derived

What is the wheelbase of the C72?

Wheelbase is the distance between the front and rear wheel axles. Also searched as axle-to-axle length.

Configuration	Size	Wheelbase	Source
C72 geometry	510	988.6 mm	RideDNA-derived
C72 geometry	550	1014.4 mm	RideDNA-derived
C72 geometry	420	973.9 mm	RideDNA-derived
C72 geometry	570	1026.3 mm	RideDNA-derived
C72 geometry	485	975.7 mm	RideDNA-derived
C72 geometry	530	1001.5 mm	RideDNA-derived
C72 geometry	455	974.9 mm	RideDNA-derived

What is the chainstay length of the C72?

Chainstay length, also called rear center, is the distance from the bottom bracket to the rear axle. Also searched as Chainstay, rear center, rear centre.

Configuration	Size	Chainstay length	Source
C72 geometry	510	403.6 mm	RideDNA-derived
C72 geometry	550	405.7 mm	RideDNA-derived
C72 geometry	420	401.2 mm	RideDNA-derived
C72 geometry	570	405.7 mm	RideDNA-derived
C72 geometry	485	401.6 mm	RideDNA-derived
C72 geometry	530	403.6 mm	RideDNA-derived
C72 geometry	455	401.2 mm	RideDNA-derived

What is the bottom bracket height of the C72?

Bottom bracket height is the vertical distance from the ground to the bottom bracket. Also searched as BB height.

Configuration	Size	Bottom bracket height	Source
C72 geometry	510	269 mm	RideDNA-derived
C72 geometry	550	269 mm	RideDNA-derived
C72 geometry	420	267 mm	RideDNA-derived
C72 geometry	570	269 mm	RideDNA-derived
C72 geometry	485	269 mm	RideDNA-derived
C72 geometry	530	269 mm	RideDNA-derived
C72 geometry	455	267 mm	RideDNA-derived

What is the front center of the C72?

Front center is the distance from the bottom bracket to the front wheel axle. Also searched as front centre.

Configuration	Size	Front center	Source
C72 geometry	510	589.3 mm	RideDNA-derived
C72 geometry	550	613 mm	RideDNA-derived
C72 geometry	420	577.4 mm	RideDNA-derived
C72 geometry	570	624.8 mm	RideDNA-derived
C72 geometry	485	578.6 mm	RideDNA-derived
C72 geometry	530	602.2 mm	RideDNA-derived
C72 geometry	455	578.4 mm	RideDNA-derived

What is the fork offset of the C72?

Fork offset is the perpendicular distance between the steering axis and the front axle. Also searched as fork rake, rake.

Configuration	Size	Fork offset	Source
C72 geometry	510	45 mm	RideDNA-derived
C72 geometry	550	45 mm	RideDNA-derived
C72 geometry	420	45 mm	RideDNA-derived
C72 geometry	570	45 mm	RideDNA-derived
C72 geometry	485	45 mm	RideDNA-derived
C72 geometry	530	45 mm	RideDNA-derived
C72 geometry	455	45 mm	RideDNA-derived

What is the head tube length of the C72?

Head tube length is the measured length of the frame's head tube. Also searched as Head tube, head tube.

Configuration	Size	Head tube length	Source
C72 geometry	510	148 mm	RideDNA-derived
C72 geometry	550	187 mm	RideDNA-derived
C72 geometry	420	101 mm	RideDNA-derived
C72 geometry	570	207 mm	RideDNA-derived
C72 geometry	485	129.5 mm	RideDNA-derived
C72 geometry	530	167 mm	RideDNA-derived
C72 geometry	455	112 mm	RideDNA-derived

What is the seat tube length of the C72?

Seat tube length is the recorded length of the frame's seat tube; measurement conventions can differ by manufacturer. Also searched as Seat tube, seat tube, frame size.

Configuration	Size	Seat tube length	Source
C72 geometry	510	510 mm	RideDNA-derived
C72 geometry	550	550 mm	RideDNA-derived
C72 geometry	420	420 mm	RideDNA-derived
C72 geometry	570	570 mm	RideDNA-derived
C72 geometry	485	485 mm	RideDNA-derived
C72 geometry	530	530 mm	RideDNA-derived
C72 geometry	455	455 mm	RideDNA-derived

What is the standover height of the C72?

Standover height is the ground-to-top-tube height at the manufacturer's stated measurement point. Also searched as Standover, stand over height, standover clearance.

Configuration	Size	Standover height	Source
C72 geometry	510	768.5 mm	RideDNA-derived
C72 geometry	550	805.2 mm	RideDNA-derived
C72 geometry	420	699 mm	RideDNA-derived
C72 geometry	570	824.1 mm	RideDNA-derived
C72 geometry	485	747.2 mm	RideDNA-derived
C72 geometry	530	786.4 mm	RideDNA-derived
C72 geometry	455	722.4 mm	RideDNA-derived

What is the fork length of the C72?

Fork length is the axle-to-crown distance recorded for the fork. Also searched as axle to crown, A2C.

Configuration	Size	Fork length	Source
C72 geometry	510	377 mm	RideDNA-derived
C72 geometry	550	377 mm	RideDNA-derived
C72 geometry	420	377 mm	RideDNA-derived
C72 geometry	570	377 mm	RideDNA-derived
C72 geometry	485	377 mm	RideDNA-derived
C72 geometry	530	377 mm	RideDNA-derived
C72 geometry	455	377 mm	RideDNA-derived

What is the wheel flop of the C72?

Wheel flop is a calculated steering-geometry value based on trail and head tube angle. Also searched as flop.

Configuration	Size	Wheel flop	Source
C72 geometry	510	16.3 mm	RideDNA-derived
C72 geometry	550	16.3 mm	RideDNA-derived
C72 geometry	420	22.1 mm	RideDNA-derived
C72 geometry	570	16.3 mm	RideDNA-derived
C72 geometry	485	17.3 mm	RideDNA-derived
C72 geometry	530	16.3 mm	RideDNA-derived
C72 geometry	455	19.8 mm	RideDNA-derived

Geometry

Available sizes: 510, 550, 420, 570, 485, 530, 455.

C72 geometry

Jump to size: 420 · 455 · 485 · 510 · 530 · 550 · 570

C72 geometry geometry by size
Size	Reach	Stack	ETT	HTA	STA	Trail	Wheelbase	Chainstay	BB drop	BB height	Front center	Fork offset	Head tube	Seat tube	Standover	Fork length	Wheel flop	Max tire
420	372.9 mm	510.6 mm	505 mm	70.8 °	75.5 °	—	973.9 mm	401.2 mm	—	267 mm	577.4 mm	45 mm	101 mm	420 mm	699 mm	377 mm	22.1 mm	—
455	376.6 mm	523.8 mm	514 mm	71.6 °	75.3 °	—	974.9 mm	401.2 mm	—	267 mm	578.4 mm	45 mm	112 mm	455 mm	722.4 mm	377 mm	19.8 mm	—
485	378.9 mm	541.5 mm	526 mm	72.5 °	74.8 °	—	975.7 mm	401.6 mm	—	269 mm	578.6 mm	45 mm	129.5 mm	485 mm	747.2 mm	377 mm	17.3 mm	—
510	387.5 mm	560.6 mm	543 mm	72.9 °	74.5 °	—	988.6 mm	403.6 mm	—	269 mm	589.3 mm	45 mm	148 mm	510 mm	768.5 mm	377 mm	16.3 mm	—
530	394.9 mm	578.7 mm	563 mm	72.9 °	73.8 °	—	1001.5 mm	403.6 mm	—	269 mm	602.2 mm	45 mm	167 mm	530 mm	786.4 mm	377 mm	16.3 mm	—
550	399.9 mm	597.8 mm	577 mm	72.9 °	73.5 °	—	1014.4 mm	405.7 mm	—	269 mm	613 mm	45 mm	187 mm	550 mm	805.2 mm	377 mm	16.3 mm	—
570	405.9 mm	617 mm	591 mm	72.9 °	73.3 °	—	1026.3 mm	405.7 mm	—	269 mm	624.8 mm	45 mm	207 mm	570 mm	824.1 mm	377 mm	16.3 mm	—

Length measurements are in millimeters; HTA and STA are in degrees. ETT means effective top tube.

Size-to-size changes

Differences are calculated from the recorded values; they are not fit recommendations.

C72 geometry: 420 → 455 — Reach +3.7 mm, Stack +13.2 mm, ETT +9 mm, HTA +0.8 °, STA -0.2 °, Wheelbase +1 mm, Chainstay +0 mm, BB height +0 mm, Front center +1 mm, Fork offset +0 mm, Head tube +11 mm, Seat tube +35 mm, Standover +23.4 mm, Fork length +0 mm, Wheel flop -2.3 mm
C72 geometry: 455 → 485 — Reach +2.3 mm, Stack +17.7 mm, ETT +12 mm, HTA +0.9 °, STA -0.5 °, Wheelbase +0.8 mm, Chainstay +0.4 mm, BB height +2 mm, Front center +0.2 mm, Fork offset +0 mm, Head tube +17.5 mm, Seat tube +30 mm, Standover +24.8 mm, Fork length +0 mm, Wheel flop -2.5 mm
C72 geometry: 485 → 510 — Reach +8.6 mm, Stack +19.1 mm, ETT +17 mm, HTA +0.4 °, STA -0.3 °, Wheelbase +12.9 mm, Chainstay +2 mm, BB height +0 mm, Front center +10.7 mm, Fork offset +0 mm, Head tube +18.5 mm, Seat tube +25 mm, Standover +21.3 mm, Fork length +0 mm, Wheel flop -1 mm
C72 geometry: 510 → 530 — Reach +7.4 mm, Stack +18.1 mm, ETT +20 mm, HTA +0 °, STA -0.7 °, Wheelbase +12.9 mm, Chainstay +0 mm, BB height +0 mm, Front center +12.9 mm, Fork offset +0 mm, Head tube +19 mm, Seat tube +20 mm, Standover +17.9 mm, Fork length +0 mm, Wheel flop +0 mm
C72 geometry: 530 → 550 — Reach +5 mm, Stack +19.1 mm, ETT +14 mm, HTA +0 °, STA -0.3 °, Wheelbase +12.9 mm, Chainstay +2.1 mm, BB height +0 mm, Front center +10.8 mm, Fork offset +0 mm, Head tube +20 mm, Seat tube +20 mm, Standover +18.8 mm, Fork length +0 mm, Wheel flop +0 mm
C72 geometry: 550 → 570 — Reach +6 mm, Stack +19.2 mm, ETT +14 mm, HTA +0 °, STA -0.2 °, Wheelbase +11.9 mm, Chainstay +0 mm, BB height +0 mm, Front center +11.8 mm, Fork offset +0 mm, Head tube +20 mm, Seat tube +20 mm, Standover +18.9 mm, Fork length +0 mm, Wheel flop +0 mm

RideDNA-derived values

These deterministic calculations use the recorded manufacturer inputs above. They are separate from manufacturer facts and are not fit recommendations.

C72 geometry size 510 stack Reach Ratio: 1.45
C72 geometry size 550 stack Reach Ratio: 1.49
C72 geometry size 420 stack Reach Ratio: 1.37
C72 geometry size 570 stack Reach Ratio: 1.52
C72 geometry size 485 stack Reach Ratio: 1.43
C72 geometry size 530 stack Reach Ratio: 1.47
C72 geometry size 455 stack Reach Ratio: 1.39