Cannondale Topstone Carbon
Gravel · 6 sizes
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- Bike
- Cannondale Topstone Carbon · Gravel · 6 sizes
- Geometry
- cannondale.com, 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.| Size | Stack (mm) | Reach (mm) | Head angle (deg) | Seat angle (deg) | Head tube (mm) | Chainstay (mm) | Wheelbase (mm) | Standover (mm) |
|---|---|---|---|---|---|---|---|---|
| 47 | 554 | 364 | 69.9 | 73.1 | 97 | 420 | 1009 | 716 |
| 51 | 561 | 373 | 70.7 | 73.1 | 101 | 420 | 1012 | 741 |
| 54 | 579 | 378 | 70.7 | 73.1 | 123 | 420 | 1026 | 772 |
| 56 | 597 | 383 | 70.7 | 73.1 | 142 | 420 | 1036 | 800 |
| 58 | 615 | 389 | 70.7 | 73.1 | 164 | 420 | 1050 | 831 |
| 61 | 646 | 397 | 70.7 | 73.1 | 196 | 420 | 1069 | 864 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 56 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.
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.
Stock stem per size47 70 mm, 51 70 mm, 54 80 mm, 56 90 mm, 58 90 mm, 61 100 mm. The maker publishes no bar width per size.
Frame facts
read from the maker's words, not a table: cannondale.com- Tyre clearance
- not recorded yet
- Bottom bracket
- not recorded yet
- Axles and brakes
- not recorded yet
- UDH
- not recorded yet
- Seatpost
- 27.2 mm round
- Frame weight
- not recorded yet
In the maker's words
Kept whole, as I read it off cannondale.com.Two-piece cockpit on the Topstone Carbon 2 GRX 2x: handlebar "Cannondale 2 ShortDrop, 7050 alloy, 12 deg flare drop" (widths per size not printed on this build); stem "Cannondale C1 Conceal, Alloy, 31.8, -6 deg: 70mm (47-51m), 80mm (54cm), 90mm (56-58cm), 100mm (61cm)" ("47-51m" sic).
Cockpit and seatpost, in the maker's words · 66 words
Two-piece cockpit on the Topstone Carbon 2 GRX 2x: handlebar "Cannondale 2 ShortDrop, 7050 alloy, 12 deg flare drop" (widths per size not printed on this build); stem "Cannondale C1 Conceal, Alloy, 31.8, -6 deg: 70mm (47-51m), 80mm (54cm), 90mm (56-58cm), 100mm (61cm)" ("47-51m" sic). Fork "1-1/8" to 1.5" steerer, 55mm OutFront offset" (round steerer). Seatpost "Cannondale 2 Carbon, 27.2x350mm (47-58), 400mm (61)" (offset not printed).
OFFICIAL SOURCE: Cannondale GB product pages for the Topstone Carbon 2 GRX 2x (SalsifyId 3884-COLL2025) and the Topstone Carbon 1 Lefty AXS (3892-COLL2025), MY2025 in the product data feed. Source: image_table (official Cannondale GB product page, "Geometry" section is a single image
How I read the maker's table
both show the same geometry image, cy25_topstonecarbon_geotable, so the maker gives one table for the rigid-fork and the Lefty builds (the Lefty's own fork numbers are not printed separately). The data feed carries Geometry null for every variant, so the image is the only table. SIZE LABELS: the table header prints 47.0/51.0/54.0/56.0/58.0/61.0; the shop's size selector says 47/51/54/56/58/61, which is what size_label holds. UNITS: lengths printed in centimetres to one decimal; every length here is the printed value x 10, angles as printed. No Wheel Size row; 700c from the spec. The 47's stack (55.4) sits only 7 mm below the 51's (56.1) on a 4 mm shorter head tube at a 0.8 deg slacker angle; as printed. STACK DATUM: O is drawn to a horizontal through the top of the head tube where G starts. MAKER INCONSISTENCY in the spec (not the table): the tyre is named "WTB Riddler TCS Light, 700x45c" while the feed's TireSize field says 37; tyre_width_mm takes the named 45. stock_stem_length is the C1 Conceal stem length per size from this build; stock_bar_width is not printed (null).
Source: image_table (official Cannondale GB product page, "Geometry" section is a single image: https://www.cannondale.com/-/media/images/my25/bikes/road/gravel/topstone-carbon/pdps/cy25_topstonecarbon_geotable.ashx, 2000x2992 px, diagram + table headed "Topstone Carbon"; numbers read from the image by the collector, image NOT stored)