Colnago TT1
Time trial · 3 sizes
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- Bike
- Colnago TT1 · Time trial · 3 sizes
- Geometry
- colnago.com, fetched 20 Oct 2026, re-checked, no differences
- Cockpit
- Generic stem and bar, assumed
- Solved with
- cover 10 mm (assumed), max spacers 40 mm (assumed), stem clamp centre 20 mm (assumed), so every verdict carries ±10 mm at the bar
- Sheet
- 23 October 2026 · 879 bikes, 79 makes, 4,979 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 M 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: colnago.com- 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 colnago.com.Time trial: "Colnago TT1 handlebars + Stem cover included"; no dimensions published.
Cockpit and seatpost, in the maker's words · 12 words
Time trial: "Colnago TT1 handlebars + Stem cover included"; no dimensions published.
OFFICIAL SOURCE: Colnago's TT1 page (https://www.colnago.com/en-us/products/tt1-bike) and the geometry chart it links, https://139650070.fs1.hubspotusercontent-eu1.net/hubfs/139650070/Geometrie%20schede/TT1%20Geometry%20Chart.pdf. Source: pdf (official Colnago geometry chart "TT1 Geometry Chart.pdf", linked from the model page as its size guide; the table read from the PDF's text layer by script; fetched 2026-10-20
How I read the maker's table
Column mapping: P (seat tube from the BB centre along the tube to its top) -> seat_tube_length; Sc -> seat_tube_angle; C -> chainstay; Ss -> head_tube_angle; BBdrop -> bb_drop; Stack; Reach. Size labels as printed (S, M, L). 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, front centre, fork rake, head tube length, top tube, stock stem, stock bar. THE PAGE AGAINST THE CHART: the page's own size tabs print 21 of these cells; 7 differ, and the chart is kept (it is the table the page offers as its size guide): S Reach: page tab "396.5 mm", chart 396.55; S Stack: page tab "471.7 mm", chart 471.73; S BB drop: page tab "72 mm", chart 70; M Reach: page tab "406.5 mm", chart 406.55; M Stack: page tab "490.7 mm", chart 490.75; L Reach: page tab "426.5 mm", chart 426.55; L Stack: page tab "490.7 mm", chart 490.75. The chart's P is the seat tube length (drawn from the BB along the seat tube to its top). Its drawing measures C (chainstay) horizontally from the BB to the rear axle, unlike Colnago's road charts. Stack and reach are printed to two decimals (471,73 / 396,55). Medium and large share stack 490,75. Model year is not printed (null).
Source: pdf (official Colnago geometry chart "TT1 Geometry Chart.pdf", linked from the model page as its size guide; the table read from the PDF's text layer by script; fetched 2026-10-20, HTTP 200)