Rose Backroad
Gravel · 6 sizes
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- Bike
- Rose Backroad · Gravel · 6 sizes
- Geometry
- rosebikes.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) |
|---|---|---|---|---|---|---|---|---|
| XS | 544.7 | 384.4 | 70.5 | 75.93 | 102 | 425 | 1018.4 | 772 |
| S | 565.5 | 388.4 | 71 | 74.52 | 122 | 425 | 1024.8 | 792 |
| M | 580.6 | 396.4 | 71.25 | 74.18 | 137 | 425 | 1035.5 | 809 |
| M/L | 599.6 | 403.2 | 71.25 | 73.85 | 157 | 425 | 1048.7 | 823 |
| L | 610.5 | 412.3 | 71.5 | 73.78 | 167 | 430 | 1063.8 | 837 |
| XL | 624.3 | 430.2 | 71.5 | 73.62 | 182 | 430 | 1086.5 | 856 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The M/L 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
read from the maker's words, not a table: rosebikes.com- Tyre clearance
- not recorded yet
- Bottom bracket
- not recorded yet
- Axles and brakes
- not recorded yet
- UDH
- not recorded yet
- Seatpost
- proprietary
- Frame weight
- not recorded yet
In the maker's words
Kept whole, as I read it off rosebikes.com.Two-piece on the Backroad GRX 820: handlebar "Rose Gravel, 40cm", stem "Rose ALR 2.0, black sand 80mm" (the size shown); per-size stems and bars are not in the geometry feed.
Cockpit and seatpost, in the maker's words · 30 words
Two-piece on the Backroad GRX 820: handlebar "Rose Gravel, 40cm", stem "Rose ALR 2.0, black sand 80mm" (the size shown); per-size stems and bars are not in the geometry feed.
OFFICIAL SOURCE: https://www.rosebikes.com/p/rose-backroad-grx-820-2725742 (product SKU 2725742). Source: html table (official Rose product page for the Backroad GRX 820, its Frame geometry table as the page loads it: the page's own bikeGeometry JSON for product SKU 2725742; fetched 2026-10-20
How I read the maker's table
SOURCE: Rose (rosebikes.com, the maker's own shop). The product page's "Frame geometry" section is filled in the browser from the page's own GraphQL query bikeGeometry(productSku) at https://www.rosebikes.com/api/ (query text taken from the page's JavaScript bundle, no credentials sent), which returns, per frame size, identifier, name, unit and value for every row of the table and a drawing (cdn.rosebikes.de/geometry/<id>.svg, not stored). Rows used: a seat tube length (seat_tube_length), b "Top tube length" (top_tube_effective; the drawing was not read for its datum), c head tube length, d head tube angle, e "seat angle" (seat_tube_angle unless an e2 row is noted below), f BB drop, g chainstay length, h wheelbase, j reach, k stack, m "Standover height (100 mm in front of BB)" (standover), p Fork offset, p1 Trail where printed, v front centre where printed, w3 "Stem lengh" (sic) and w1 Handlebar Width where printed (stock_stem_length, stock_bar_width). Decimal commas converted by script (73,25 = 73.25); values otherwise exactly as returned. No stack datum is stated in words (stack_datum null). No model year is printed (model_year null). Stack, reach and wheelbase are returned to two decimals (544,7; 384,39; 1018,36), recorded as returned. Rows kept here only: a1 frame height 50/53/55/57/59/62 (unit printed as a translation key, "frame_geometry.unit.a1"); j1 Reach+ 533.12/537.86/555.99/562.81/582.01/599.89 and k1 Stack+ 637.12/657.4/674.51/693.45/705.79/720.01 (datum not stated); o stack to reach ratio; q Wheel diameter 28 in; r max. tyre width 2.1 in, r1 53 mm; u fork length 410; w necessary seat post diameter D-Shape; x recommended size (cm) 161-167/168-173/174-179/180-184/185-191/192-199; z system weight 120 kg. Fork "Rose Backroad ADV". Stock tyre "Continental Terra Adventure, black/black 700x45C". The earlier carbon Backroad (2020-2024) is not covered here. CROSS-CHECK NOTE: the 3 seat-angle cells that differ from Bike Insights are not a disagreement about one number: Bike Insights holds Rose e row (seat angle 75.5/74.5/74.25/74/73.75/73.5), this file holds Rose e2 row (effective seat tube angle); Bike Insights matches the e row exactly.
Source: html table (official Rose product page for the Backroad GRX 820, its Frame geometry table as the page loads it: the page's own bikeGeometry JSON for product SKU 2725742; fetched 2026-10-20, HTTP 200)