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Dolan RDX

Endurance road · 5 sizes

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Bike
Dolan RDX · Endurance road · 5 sizes
Geometry
dolan-bikes.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)not published Wheelbase (mm)not published Standover (mm)not published
49cm 535.9 376.4 70 74 120
52cm 558.7 375 71 74 140
54cm 568.1 376.4 71 73 150
56cm 589 384.9 72 73 170
58cm 608.1 394.2 72 73 190

The table runs on to the right: 6 more columns after Reach. Scroll it sideways to read them.

Seat tube 540 mmHead tube 150 mmTop tube 550 mmDown tubeChainstay 410 mm (estimated)Seat stay (estimated)Fork (estimated) stack 568reach 376Head tube top 376 / 568BB 0 / 0

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. A dashed tube is a number the maker left out (est.).

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: dolan-bikes.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 dolan-bikes.com.
Two-piece bar and stem, chosen in the build configurator.
Cockpit and seatpost, in the maker's words · 146 words
Two-piece bar and stem, chosen in the build configurator. The page's sizing guide, written per rider size and separate from the geometry table, reads: "X-Small | 5'2" - 5'5" - 157.5-167.5cm | Crank Length: 170mm | Stem: 8cm | Bar Width: 40cm | Small | 5'4" - 5'8" - 162-172.5cm | Crank Length: 172.5mm | Stem: 9cm | Bar Width: 42cm | Medium | 5'8" - 5'11" - 172.5-180cm | Crank Length: 172.5mm | Stem: 10cm | Bar Width: 44cm | Large | 5'10" - 6'2" - 177.5-187.5cm | Crank Length: 172.5mm | Stem: 11cm | Bar Width: 44cm | X Large | 6'1" - 6'4" - 185-192.5cm | Crank Length: 175mm | Stem: 12cm | Bar Width: 46cm". Because the guide is not a row of the geometry table, stock_stem_length and stock_bar_width are left null rather than paired with the table's sizes by the collector.
OFFICIAL SOURCE: Dolan Bikes (Preston, UK, maker and seller of its own frames) product page, RDX disc road, five sizes 49cm to 58cm. Source: html table (official Dolan Bikes product page "RDX", "Sizing & Geometry" table in the page markup; fetched 2026-10-20
How I read the maker's table
The "Sizing & Geometry" HTML table prints, by letter: A Head Angle, B Head Tube Length (mm), C Effective Top Tube Horizontal (mm), D Seat Angle, E Seat Tube Length Center To Top (mm), F Stack (mm), G Reach (mm). Not printed, so null: chainstay, wheelbase, BB drop, fork offset, front centre, standover, trail. REACH FALLS from 49cm (376.4) to 52cm (375), as printed. Model year: not printed (null). Source: html table (official Dolan Bikes product page "RDX", "Sizing & Geometry" table in the page markup; fetched 2026-10-20, HTTP 200)