Giant Defy Advanced / Advanced Pro
Endurance road · 6 sizes
The Defy Advanced / Advanced Pro on giant-bicycles.com
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- Bike
- Giant Defy Advanced / Advanced Pro · Endurance road · 6 sizes
- Geometry
- giant-bicycles.com, fetched 22 Oct 2026, re-checked, no differences
- Seat angle convention
- Calculated from Giant's table
- 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
- 22 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.| Size | Stack (mm) | Reach (mm) | Head angle (deg) | Seat angle (deg) | Head tube (mm) | Chainstay (mm) | Wheelbase (mm) | Standover (mm) |
|---|---|---|---|---|---|---|---|---|
| XS | 522 | 370 | 70.5 | 74.5 | 120 | 420 | 995 | 731 |
| S | 546 | 374 | 71.8 | 74 | 140 | 420 | 995 | 760 |
| M | 567 | 377 | 72.5 | 73.5 | 160 | 420 | 998 | 786 |
| ML | 586 | 381 | 72.5 | 73 | 185 | 420 | 1010 | 816 |
| L | 605 | 390 | 72.5 | 73 | 205 | 420 | 1025 | 835 |
| XL | 624 | 398 | 72.5 | 72.5 | 225 | 420 | 1040 | 856 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The ML 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 and bar per sizeXS 80 x 400, S 90 x 400, M 100 x 420, ML 100 x 420, L 110 x 440, XL 110 x 440 (stem length x bar width, mm)
Frame facts
not read off the maker's page yet: giant-bicycles.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 giant-bicycles.com.Defy Advanced Pro 1 (2020), Giant UK spec: Handlebar "Giant Contact SLR D-Fuse"; Stem "Contact SL Stealth" (no angle printed; lengths per size only in the geometry table's Stem Length row, 80/90/100/100/110/110).
Cockpit and seatpost, in the maker's words · 59 words
Defy Advanced Pro 1 (2020), Giant UK spec: Handlebar "Giant Contact SLR D-Fuse"; Stem "Contact SL Stealth" (no angle printed; lengths per size only in the geometry table's Stem Length row, 80/90/100/100/110/110). Fork "Advanced-Grade Composite, full-composite OverDrive 2 steerer, disc". Seatpost "Giant D-Fuse SL, composite". The 2021 page lists Stem "Giant Contact SL" and Seatpost "Giant D-Fuse SLR, composite".
OFFICIAL SOURCE: Giant UK archive page for the Defy Advanced Pro 1 (2020), title "Defy Advanced Pro 1 (2020) | Giant Bicycles UK", frame "Advanced-Grade Composite, disc". Source: html table (official Giant UK archive bike page, section "Sizing Guide and Geometry", the HTML <table class="geometry"> with mm and inch spans; fetched 2026-10-22
How I read the maker's table
The Defy between the MY2018 one (giant-defy-2018.json, 42 of 78 cells differ) and the MY2022 one (giant-defy-2022.json). Against the MY2022 table every stack, reach, angle, top tube, seat tube, chainstay, wheelbase, BB drop, rake and standover is the same; the head tube is 120 on XS and 140 on S here against 125 and 135 there, and the trail is printed to whole millimetres (71/63/58). The Defy Advanced Pro 1 (2021) page (https://www.giant-bicycles.com/gb/defy-advanced-pro-1-2021) prints this table again with the trail to one decimal (71.3/63.1/58.2), so it ran MY2020 to MY2021. Six sizes XS, S, M, M/L (table header ML), L, XL in the table; the spec Sizes line reads "S, M, ML, L, XL". Giant does not say whether the seat angle is effective or actual (null), does not publish front centre (null) and does not state the stack datum (null). Stock tyre "Giant Gavia Fondo 1, tubeless, 700x32, folding"; the 2021 page adds "(max tyre width possible: 35mm)".
Source: html table (official Giant UK archive bike page, section "Sizing Guide and Geometry", the HTML <table class="geometry"> with mm and inch spans; fetched 2026-10-22, HTTP 200)