Colnago G3-X
Gravel · 5 sizes
Sign in and add the bike you ride, and this table will say what each size needs for your position.
Sign in
This is the bike I ride
No account is needed to read the table. Report a wrong number · Correct this bike
- Bike
- Colnago G3-X · Gravel · 5 sizes
- Geometry
- 139650070.fs1.hubspotusercontent-eu1.net, fetched 20 Oct 2026, re-checked, no differences
- Cockpit
- Generic stem and bar, assumed
- Solved with
- cover 15 mm (assumed), max spacers 40 mm (assumed), stem clamp centre 20 mm (assumed), so every verdict carries ±10 mm at the bar
- Sheet
- 22 October 2026 · 686 bikes, 74 makes, 3,984 sizes in the catalogue
Geometry, every size, from the maker's table
The tinted row is the size drawn beside it. Press a size to draw it.The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 52s drawn to scale from the table, with no build on it. Stack and reach run from the bottom bracket to the top of the head tube; every size is solved from those two. One square is 100 mm. A dashed tube is a number the maker left out (est.).
The maker's cockpit
No stock cockpit I can name, so every size is solved on a generic stem and bar unless you choose one on the sheet.Generic stem and barAssumedNo bar is listed for this frame.
Frame facts
not read off the maker's page yet: 139650070.fs1.hubspotusercontent-eu1.net- Tyre clearance
- not recorded yet
- Bottom bracket
- not recorded yet
- Axles and brakes
- not recorded yet
- UDH
- not recorded yet
- Seatpost
- not recorded yet
- Frame weight
- not recorded yet
In the maker's words
Kept whole, as I read it off 139650070.fs1.hubspotusercontent-eu1.net.No cockpit is named in the chart; the G3-X has no current product page.
Cockpit and seatpost, in the maker's words · 14 words
No cockpit is named in the chart; the G3-X has no current product page.
OFFICIAL SOURCE: Colnago's geometry chart https://139650070.fs1.hubspotusercontent-eu1.net/hubfs/139650070/Geometrie%20schede/G3-X-Geometry%20Chart.pdf (hosted by Colnago, no current product page). Source: image_table in a pdf (official Colnago geometry chart "G3-X-Geometry Chart.pdf", hosted by Colnago: the PDF holds the chart as a picture with no text layer, so every number was read by eye at full resolution; image and PDF NOT stored; fetched 2026-10-20
How I read the maker's table
Column mapping: fork (fork length, axle to crown) not in the schema; Sc -> seat_tube_angle; A (BB centre to front axle) -> front_centre; C -> chainstay; Hs -> head_tube_length; Ss -> head_tube_angle; bbdrop -> bb_drop; O (top tube, drawn horizontal from the head tube top to the seat tube line) -> top_tube_effective; Stack; Reach. Size labels as printed (46s, 49s, 52s, 55s, 58s). DRAWING (read only for its letters and datums, not stored): Stack and Reach are drawn from the BB centre to the top of the head tube (no headset cover named, so stack_datum is null); O is drawn horizontal from the head tube top to the seat tube line; the size is drawn along the seat tube from the BB centre to its top. Not published, so null: wheelbase, standover, trail, fork rake, seat tube length, stock stem, stock bar. SOURCE: the chart PDF is hosted by Colnago and listed in the colnago.com site data (the same "Geometrie schede" folder as the current charts), but no current product page links it. Sizes printed 46s to 58s ("s" for sloping). The chart prints no seat tube length, rake, trail or wheelbase. model_year 2020 is the Bike Insights version of the G3-X; the maker prints none.
Source: image_table in a pdf (official Colnago geometry chart "G3-X-Geometry Chart.pdf", hosted by Colnago: the PDF holds the chart as a picture with no text layer, so every number was read by eye at full resolution; image and PDF NOT stored; fetched 2026-10-20, HTTP 200)