Mason Bokeh
Gravel · 8 sizes
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- Bike
- Mason Bokeh · Gravel · 8 sizes
- Versions
- Current, this table · 2023
- Geometry
- masoncycles.cc, 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) |
|---|---|---|---|---|---|---|---|---|
| 48CM | 524.9 | 364.1 | 69.5 | 74.5 | 100 | 435 | 1013.1 | 734.8 |
| 50CM | 540.9 | 363.7 | 70 | 74 | 115 | 435 | 1013.9 | 761 |
| 52CM | 555 | 374.7 | 70 | 74 | 130 | 435 | 1021.8 | 777.6 |
| 54CM | 569.1 | 378.7 | 70.5 | 73 | 145 | 435 | 1035.2 | 795.3 |
| 56CM | 580.5 | 383.5 | 71 | 73 | 155 | 435 | 1038.9 | 810.7 |
| 58CM | 589.9 | 398 | 71.5 | 72.5 | 165 | 440 | 1057 | 826.4 |
| 60CM | 608.9 | 402.7 | 71.5 | 72.5 | 185 | 440 | 1068 | 845.6 |
| 62CM | 634.7 | 400.7 | 72 | 72.5 | 210 | 440 | 1070 | 868.1 |
The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.
The 56CM 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 size48CM 70 x 400, 50CM 80 x 420, 52CM 90 x 420, 54CM 100 x 440, 56CM 110 x 440, 58CM 110 x 460, 60CM 120 x 460, 62CM 120 x 460 (stem length x bar width, mm)
Frame facts
read from the maker's words, not a table: masoncycles.cc- Tyre clearance
- 700c x 50 mm, 650b x 55 mm
- 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 masoncycles.cc.No cockpit with the frameset; complete builds come with bars, stem and cranks "pre-set to match frame size".
Cockpit and seatpost, in the maker's words · 83 words
No cockpit with the frameset; complete builds come with bars, stem and cranks "pre-set to match frame size". The chart's STEM row prints stem lengths 70, 80, 90, 100, 110, 110, 120, 120 (48CM to 62CM) mm and its HANDLEBAR (OUTSIDE DIMENSION) row prints 40, 42, 42, 44, 44, 46, 46, 46 for 48CM to 62CM (cm, outside dimension). Two-piece bar and stem; the frameset comes with a Deda headset, expander bung and top cap; no bar is named on the frameset page.
OFFICIAL SOURCE: Mason Cycles product page for the Bokeh 3.5 Frameset (page title "Bokeh 3.5 Frameset". Source: html table (official Mason Cycles product page "Bokeh 3.5 Frameset", the "Full geometry chart" table in the page markup; fetched 2026-10-20
How I read the maker's table
the URL still says bokeh-3), the aluminium gravel bike, eight sizes 48CM to 62CM, labels as printed. Some angle cells carry a degree sign in the markup (71.5º), stripped by the parser. Stack datum: the page's geometry diagram (/media/images/diagram-geometry.png, read for the datum only, not stored) draws stack and reach to the head tube top; no headset cover height is given. TRAIL carries the remark "Trail data for more wheel/tyres in full geo. chart (where applicable)" but only one trail row is printed and its wheel and tyre are not named, so tyre_width_mm is null; back-solved against the head angle and offset it implies a wheel radius of 342.6 mm on 48CM and 350.5-350.6 mm on 50CM to 62CM, the same pattern as the 650 x 47 / 650 x 55 rows of the Exposure chart, so wheel_size 650b. REACH DOES NOT RISE EVERYWHERE, as printed: 48CM 364.1 then 50CM 363.7, and 60CM 402.7 then 62CM 400.7 (the 62CM has the longest head tube, 210, and the steepest head angle). stock_bar_width is the HANDLEBAR (OUTSIDE DIMENSION) row, printed in cm, converted to mm (42 -> 420) where one width is printed; it is the bar's OUTSIDE dimension as the maker labels it, not centre to centre. Frame weights printed per size 1580g to 1860g; FORK WEIGHT PARALLAX 465g. Clearance: "650b x 55 [2.1”] or 700c x 50 wheel/tyre sizes". Model year: not printed on the page (model_year null). Bike Insights files a Bokeh "2026" version with a "3.5 Sram" build.
Source: html table (official Mason Cycles product page "Bokeh 3.5 Frameset", the "Full geometry chart" table in the page markup; fetched 2026-10-20, HTTP 200)