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Boardman SLR 8.9 Disc

Road · 4 sizes

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Bike
Boardman SLR 8.9 Disc · Road · 4 sizes
Geometry
boardmanbikes.com, fetched 29 Aug 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
6 September 2026 · 210 bikes, 43 makes, 1,262 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)not published Standover (mm)not published
SM 546 378 72 73.5 140 410
MD 567 387 72.5 73.5 160 410
LG 588 390 73 73 180 410
XL 603 401 73 73 195 410

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

Seat tube 525 mmHead tube 180 mmTop tube 570 mmDown tubeChainstay 410 mmSeat stayFork (estimated) stack 588reach 390Head tube top 390 / 588BB 0 / 0

The LG 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.
Stock stem and bar per sizeSM 90 x 400, MD 100 x 400, LG 110 x 420, XL 120 x 440 (stem length x bar width, mm)

In the maker's words

Kept whole, as I read it off boardmanbikes.com.
SLR 8.9 Disc (2021): Boardman alloy stem 90/100/110/120 mm and bar 400/400/420/440 mm per size (SM/MD/LG/XL) from the sizing panel, stored as stock fields; crank 170/170/172.5/175 mm.
Cockpit and seatpost, in the maker's words · 27 words
SLR 8.9 Disc (2021): Boardman alloy stem 90/100/110/120 mm and bar 400/400/420/440 mm per size (SM/MD/LG/XL) from the sizing panel, stored as stock fields; crank 170/170/172.5/175 mm.
OFFICIAL SOURCE: boardmanbikes.com product page for the SLR 8.9 Disc (2021 model year, the latest listing the maker keeps online for the SLR carbon disc frame). Source: html table (official Boardman Bikes product page, "Sizes & Fit" panel rendered as div rows, parsed by script; fetched 2026-08-29
How I read the maker's table
Wheelbase, standover, front centre and trail are not published (null). Rider height bands SM 170-179 cm, MD 177-183, LG 181-189, XL 187-195. Source: html table (official Boardman Bikes product page, "Sizes & Fit" panel rendered as div rows, parsed by script; fetched 2026-08-29, HTTP 200)