Trek Domane AL Gen 3
Endurance road · 7 sizes
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- Bike
- Trek Domane AL Gen 3 · Endurance road · 7 sizes
- Geometry
- api.trekbikes.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) |
|---|---|---|---|---|---|---|---|---|
| 44cm | 510 | 360 | 70.3 | 74.6 | 95 | 420 | 983 | 657 |
| 49cm | 540 | 368 | 70.8 | 74.6 | 123 | 425 | 1001 | 717 |
| 52cm | 561 | 371 | 71.3 | 74.2 | 145 | 420 | 1003 | 735 |
| 54cm | 575 | 374 | 71.3 | 73.7 | 160 | 420 | 1010 | 754 |
| 56cm | 591 | 377 | 71.9 | 73.3 | 175 | 420 | 1018 | 776 |
| 58cm | 611 | 380 | 72 | 73 | 195 | 425 | 1022 | 796 |
| 61cm | 646 | 385 | 72.1 | 72.7 | 235 | 425 | 1038 | 842 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 54cm 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.
Frame facts
not read off the maker's page yet: api.trekbikes.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 api.trekbikes.com.Trek's sizing feed carries no bar or stem rows; no cockpit was read for this file.
Cockpit and seatpost, in the maker's words · 16 words
Trek's sizing feed carries no bar or stem rows; no cockpit was read for this file.
OFFICIAL SOURCE: Trek OCC sizing feed for code 33085, the Domane AL 4 Disc (named by Bike Insights' citation of Trek's US page, which Bike Insights files as 2022), geometry asset Geometry_Lines_2050x1500_Road_DomaneSLR9, seven numeric sizes 44, 49, 52, 54, 56, 58, 61 cm. Source: html table (official Trek OCC JSON that renders the "Sizing and fit" geometry table of the trekbikes.com product page
How I read the maker's table
Trek's feed states no model year (null). FOR CARL: every cell equals trek-domane-al-gen-4.json except the 44 cm top tube, 501 here against 507 there; this file's 501 is the one its own stack, reach and seat angle close on (360 + 510 / tan 74.6 = 500.5), so the Gen 4 file's 507 may be a slip in Trek's Gen 4 feed (that file was not edited). UNITS: Trek publishes the table in centimetres to one decimal and angles in degrees; every length was multiplied by 10 to give millimetres (Decimal arithmetic, exact, no rounding). Column mapping from Trek's geometryDataHeaders: geometrySeattube -> seat_tube_length, geometryAngleSeattube -> seat_tube_angle, geometryLengthHeadtube -> head_tube_length, geometryAngleHead -> head_tube_angle, geometryEffToptube -> top_tube_effective, geometryBBDrop -> bb_drop, geometryLengthChainstay -> chainstay, geometryOffset -> fork_offset, geometryTrail -> trail, geometryWheelbase -> wheelbase, geometryStandover -> standover, geometryFrameReach -> reach, geometryFrameStack -> stack (Trek's frame stack and reach, so stack_datum head tube top). Front centre and saddle rail heights are not in this feed (front centre null). Bike Insights' 2022 Domane AL entry (citing Trek's US page for the same code) prints 507 for the 44 cm top tube and 1008 for the 56 cm wheelbase, where Trek's GB feed today prints 501 and 1018.
Source: html table (official Trek OCC JSON that renders the "Sizing and fit" geometry table of the trekbikes.com product page, https://api.trekbikes.com/occ/v2/gb/products/33085/sizing, Domane AL 4 Disc; fetched 2026-10-20, HTTP 200)