Trek Domane AL Gen 4
Endurance road · 7 sizes
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- Bike
- Trek Domane AL Gen 4 · Endurance road · 7 sizes
- Geometry
- api.trekbikes.com, fetched 29 Aug 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
- 6 September 2026 · 210 bikes, 43 makes, 1,262 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.
In the maker's words
Kept whole, as I read it off api.trekbikes.com.Complete bikes ship with Trek's two-piece stem and bar (RCS stem or Bontrager Elite / Pro bar, sizes per build, not per frame); the frameset carries no bar.
Cockpit and seatpost, in the maker's words · 49 words
Complete bikes ship with Trek's two-piece stem and bar (RCS stem or Bontrager Elite / Pro bar, sizes per build, not per frame); the frameset carries no bar. Spacer heights, top-cover height and maximum spacer stack are not in the sizing feed. stock_stem_length null unless the feed carries geometryLengthStem.
OFFICIAL SOURCE: Trek OCC sizing feed for the Domane AL 5 Gen 4 (code 80404), geometry asset MY24_Domane_AL_2050x1500_Geometry_Lines, seven numeric sizes 44-61 cm (aluminium frame. 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
the carbon Domane Gen 4 is a different table, see trek-domane-gen-4.json). Front centre not published (null). Model year 2024 from the asset id. UNITS: Trek publishes the table in centimetres to one decimal and angles in degrees; every length was multiplied by 10 to give millimetres, no rounding was needed. 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, geometryFrontCenter -> front_centre (where present). Stack and reach are Trek's frame stack/reach to the head tube top. The feed lists only the sizes of the chosen SKU, so the SKU with the fullest size run was used; where Trek publishes saddle-rail height ranges (short and tall seatposts) they are in the feed but not in the schema.
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/80404/sizing, fetched live 2026-08-29, HTTP 200)