Geometry ?
Author Guru 2026 geometry in sizes 48 cm (S)–57 cm (XL): stack 567–624 mm, reach 381–417 mm, head angle 70.5–71°.
| 48 cm (S) | 51 cm (M) | 54 cm (L) | 57 cm (XL) | |
|---|---|---|---|---|
| Stack | 567 mm | 586 mm | 603 mm | 624 mm |
| Reach | 381 mm | 394 mm | 406 mm | 417 mm |
| Head angle | 70.5° | 71° | 71° | 71° |
| Seat angle | 73.5° | 73.5° | 73.5° | 73.5° |
| Seat tube (c-t) | 480 mm | 510 mm | 540 mm | 570 mm |
| Head tube | 130 mm | 150 mm | 170 mm | 190 mm |
| Top tube (effective) | 549 mm | 567 mm | 585 mm | 602 mm |
| BB drop | 74 mm | 74 mm | 74 mm | 74 mm |
| Chainstay | 435 mm | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1035 mm | 1049 mm | 1069 mm | 1086 mm |
| Fork length | 408 mm | 408 mm | 408 mm | 408 mm |
| Fork offset | 47 mm | 47 mm | 47 mm | 47 mm |
Source: cz.author.eu, 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: 2025. Source: en.author.eu
Stock build
Guru 3.0 2026
- Groupset
- Shimano GRX 825 Di2 2×12 (48-31, 11-36)
- Shifters
- Shimano GRX 825 Di2
- Cranks
- SHIMANO GRX 820-2 48-31, 172.5/175 mm
- Stem
- FSA NS SMR-II
- Handlebar
- FSA Wing AGX, 420/440 mm
- Seatpost
- FSA K-Force SBO carbon 27.2
- Saddle
- PROLOGO Scratch M5 Space AGX Tirox
Guru 2.0 2026
- Groupset
- Shimano GRX 1×12 mechanical (GRX 822 RD, 42T, 10-45)
- Shifters
- Shimano GRX 610
- Cranks
- SHIMANO GRX 820-1 42T, 172.5/175 mm
- Stem
- FSA NS SMR-II
- Handlebar
- FSA A-Wing, 420/440 mm
- Seatpost
- FSA Comet SBO alloy 27.2
- Saddle
- PROLOGO Scratch M5 Space AGX Tirox
Guru 1.0 2026
- Groupset
- Shimano GRX 2×11 (GRX 600 46-30, GRX 810 FD/RD, 11-34)
- Shifters
- Shimano GRX 600
- Cranks
- SHIMANO GRX 600-11 46-30, 172.5/175 mm
- Stem
- FSA NS SMR-II
- Handlebar
- FSA A-Wing, 420/440 mm
- Seatpost
- FSA Comet SBO alloy 27.2
- Saddle
- AUTHOR Guru CR
Source for all builds: cz.author.eu, checked 1 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size 48 cm (S) (stack 567 / reach 381 mm).
Stack and reach within 12 mm of size 51 cm (M) (stack 586 / reach 394 mm).
Stack and reach within 12 mm of size 54 cm (L) (stack 603 / reach 406 mm).
Stack and reach within 12 mm of size 57 cm (XL) (stack 624 / reach 417 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 8 values for this model’s stem and bars. Add them