Fairlight Strael 4.0
Endurance road · 10 sizes
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- Bike
- Fairlight Strael 4.0 · Endurance road · 10 sizes
- Geometry
- media.fairlightcycles.com, fetched 21 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) |
|---|---|---|---|---|---|---|---|---|
| 51R | 530 | 380 | 71.5 | 74 | 106 | 419 | 992 | 758 |
| 51T | 560 | 370 | 71.5 | 74 | 137 | 419 | 992 | 772 |
| 54R | 548 | 386 | 72.25 | 73.75 | 124 | 419 | 998 | 780 |
| 54T | 580 | 378 | 72.25 | 73.75 | 157 | 419 | 1001 | 795 |
| 56R | 566 | 394 | 73 | 73.5 | 140 | 419 | 1005 | 794 |
| 56T | 600 | 386 | 73 | 73.5 | 176 | 419 | 1007 | 815 |
| 58R | 584 | 402 | 73.25 | 73.5 | 158 | 419 | 1016 | 812 |
| 58T | 620 | 394 | 73.25 | 73.5 | 195 | 419 | 1019 | 833 |
| 61R | 602 | 410 | 73.25 | 73.5 | 177 | 419 | 1029 | 830 |
| 61T | 640 | 402 | 73.25 | 73.5 | 216 | 419 | 1033 | 851 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 56T 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: media.fairlightcycles.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 media.fairlightcycles.com.Frameset: no cockpit; two-piece bar and stem of the buyer's choice.
Cockpit and seatpost, in the maker's words · 27 words
Frameset: no cockpit; two-piece bar and stem of the buyer's choice. No bar is named and no stem or bar sizes are printed in the geometry sheet.
OFFICIAL SOURCE: Fairlight Cycles (Bristol, UK) all-models geometry PDF linked from every model page (https://fairlightcycles.com/strael-4-0/ and the others), page 4, "STRAEL 4.0", 10 sizes 51R, 51T, 54R, 54T, 56R, 56T, 58R, 58T, 61R, 61T. Source: pdf (official Fairlight Cycles "FAIRLIGHT FRAME GEOMETRIES, All models - v4.0 - updated 29/8/25" PDF, page 4 "STRAEL 4.0", text layer read by script; PDF not stored; fetched 2026-10-21
How I read the maker's table
Sizes come in R (regular) and T (tall) pairs at each nominal size, the T with a taller head tube and shorter reach, so stack and reach do not rise monotonically through the list (as designed, "proportional geometry"). The sheet's first pages give the headset top cup stack: Strael, Secan and Holt 8 mm (Hope Cup 2) / 8.2 mm (Chris King Inset 7) / 8 mm (FSA); Faran 17 mm (Hope Cup 1) / 17.7 mm (Chris King NoThreadSet) / 17 mm (FSA); stack is to the head tube top (stack_datum "head tube top"), the cup sits on top of it. The previous Strael 1.0 / 2.0 / 3.0 table is fairlight-strael.json (the same sheet's page 3 matches that file cell for cell). The page: "Newly developed Reynolds 853 Road DZB frame. c.200g weight saving versus the Strael 3.0 frame"; "Max measured width - 700 x 39"; Fairlight Anraed 4 fork. Model year: not printed (null).
Source: pdf (official Fairlight Cycles "FAIRLIGHT FRAME GEOMETRIES, All models - v4.0 - updated 29/8/25" PDF, page 4 "STRAEL 4.0", text layer read by script; PDF not stored; fetched 2026-10-21, HTTP 200)