Geometry ?
Boardman SLR (alloy, rim brakes) 2021 geometry in sizes SM–XL: stack 547–604 mm, reach 378–400 mm, head angle 72–73°.
| SM | MD | LG | XL | |
|---|---|---|---|---|
| Stack | 547 mm | 568 mm | 589 mm | 604 mm |
| Reach | 378 mm | 384 mm | 390 mm | 400 mm |
| Head angle | 72° | 72.5° | 73° | 73° |
| Seat angle | 73.5° | 73.5° | 73° | 73° |
| Seat tube (?) | 515 mm | 530 mm | 555 mm | 575 mm |
| Head tube | 140 mm | 160 mm | 180 mm | 195 mm |
| Top tube (effective) | 540 mm | 552 mm | 570 mm | 585 mm |
| BB drop | 68 mm | 68 mm | 68 mm | 68 mm |
| Chainstay | 415 mm | 415 mm | 415 mm | 415 mm |
| Fork offset | 48 mm | 48 mm | 45 mm | 45 mm |
| Stock build by size | ||||
| Cranks | 170 mm | 170 mm | 172.5 mm | 175 mm |
| Stem | 90 mm | 100 mm | 110 mm | 120 mm |
| Bar width | 400 mm | 400 mm | 420 mm | 440 mm |
(?) by the seat tube length: the manufacturer doesn’t say whether it’s measured centre to centre (c-c) or centre to top (c-t).
Source: boardmanbikes.com, checked 1 Nov 2026 · bar position: worked out from published data
An older model year in the archive with the same stack, reach and head angle: 2022. Source: bikeradar.com
Stock build
SLR 8.6 ≈ €754
- Groupset
- Shimano Claris 2×8 (FSA Tempo Compact 50-34)
- Shifters
- Shimano Claris 2×8
- Cranks
- FSA Tempo Compact 50-34
- Stem
- Boardman Alloy, 31.8 mm clamp
- Handlebar
- Boardman Alloy, 31.8 mm clamp, 75 mm reach, 120 mm drop
- Seatpost
- Boardman Alloy, 27.2 mm
- Saddle
- Boardman SLR
- List price
- £650 (boardmanbikes.com, 1 Nov 2026)
Source: boardmanbikes.com, checked 1 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size SM (stack 547 / reach 378 mm).
Stack and reach within 12 mm of size MD (stack 568 / reach 384 mm).
Stack and reach within 12 mm of size LG (stack 589 / reach 390 mm).
Stack and reach within 12 mm of size XL (stack 604 / reach 400 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 1 value for this model’s stem and bars. Add them