Author: stock cockpit data
39 values missing in 4 of 5 models. Database as of 14 Nov 2026. Angle and reach are usually the same across sizes, so enter them once. Anything shared by several models can be copied.
I’m Marcel Dobrocký, a bike fitter from Brno in the Czech Republic. On sedimi.bike, riders enter their riding position and the site works out which frames and sizes fit them. To do that for Author bikes, I’m missing the stem length or angle and the bar reach.
These are figures you can see on the bike or read off the parts, nothing internal. Where I don’t know them, I use an estimate. With your numbers, the size is worked out from the actual build, and each value is marked ◆ with its source (manufacturer or dealer), with no name attached. Even one model helps. I check every value before it goes in. About sedimi
Aura XR 2026
12 missinggravel · aluminium · sizes 500–580 · how visitors see it now
Builds: Aura XR7 2026, Aura XR6 2026
Cockpit: stem RITCHEY Comp 4-Axis + bars RITCHEY Road ErgoMax Comp
Angle −6° · Bar reach 72 mm
| Size | 500 | 520 | 540 | 560 | 580 |
|---|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 11 missing
Bar width at the hoods, centre to centre.
| Size | 500 | 520 | 540 | 560 | 580 |
|---|---|---|---|---|---|
| Cranks (mm) | |||||
| Bar width (mm) |
Builds: Aura XR5 2026, Aura XR4 2026
Cockpit: stem AUTHOR alloy + bars PROMAX
| Size | 500 | 520 | 540 | 560 | 580 |
|---|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 11 missing
Bar width at the hoods, centre to centre.
| Size | 500 | 520 | 540 | 560 | 580 |
|---|---|---|---|---|---|
| Cranks (mm) | |||||
| Bar width (mm) |
Cover, spacers and tyre (optional) 3 missing
A mandatory spacer is one that can’t be removed, for example because of internal hose routing.
Email a spreadsheet or PDFForward to a colleague
Have it in a spreadsheet? Send the export or a price list with the spec, just as it is, to marcel@bikefit.space. I’ll copy the numbers across myself. Don’t have them at hand? Send the link to a colleague in R&D or service.
Not sure? Put a question mark after the number, like 100?, or explain in the note. You can paste a whole row from Excel in one go.
Charisma 2025
12 missingendurance road · carbon · sizes 48 cm (S)–55 cm (XL) · how visitors see it now
Build: Charisma 66i 2025-26
Cockpit: stem FSA NS SMR-II + bars FSA K-Wing AGX
Angle −10° · Bar reach 76 mm
| Size | 48 cm (S) | 50 cm (M) | 52 cm (L) | 55 cm (XL) |
|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 9 missing
Bar width at the hoods, centre to centre.
| Size | 48 cm (S) | 50 cm (M) | 52 cm (L) | 55 cm (XL) |
|---|---|---|---|---|
| Cranks (mm) | ||||
| Bar width (mm) |
Build: Charisma 55i 2025-26
Cockpit: stem FSA NS SMR-II + bars FSA A-Wing Pro
Angle −10° · Bar reach 88.6 mm
| Size | 48 cm (S) | 50 cm (M) | 52 cm (L) | 55 cm (XL) |
|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 9 missing
Bar width at the hoods, centre to centre.
| Size | 48 cm (S) | 50 cm (M) | 52 cm (L) | 55 cm (XL) |
|---|---|---|---|---|
| Cranks (mm) | ||||
| Bar width (mm) |
Build: Charisma 55 2025-26
Cockpit: stem FSA NS SMR-II + bars FSA A-Wing
Angle −10° · Bar reach 88 mm
| Size | 48 cm (S) | 50 cm (M) | 52 cm (L) | 55 cm (XL) |
|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 9 missing
Bar width at the hoods, centre to centre.
| Size | 48 cm (S) | 50 cm (M) | 52 cm (L) | 55 cm (XL) |
|---|---|---|---|---|
| Cranks (mm) | ||||
| Bar width (mm) |
Cover, spacers and tyre (optional) 3 missing
A mandatory spacer is one that can’t be removed, for example because of internal hose routing.
Guru 2026
8 missinggravel · carbon · sizes 48 cm (S)–57 cm (XL) · how visitors see it now
Build: Guru 3.0 2026
Cockpit: stem FSA NS SMR-II + bars FSA Wing AGX
Angle −10° · Bar reach 88 mm
| Size | 48 cm (S) | 51 cm (M) | 54 cm (L) | 57 cm (XL) |
|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 9 missing
Bar width at the hoods, centre to centre.
| Size | 48 cm (S) | 51 cm (M) | 54 cm (L) | 57 cm (XL) |
|---|---|---|---|---|
| Cranks (mm) | ||||
| Bar width (mm) |
Builds: Guru 2.0 2026, Guru 1.0 2026
Cockpit: stem FSA NS SMR-II + bars FSA A-Wing
Angle −10° · Bar reach 88 mm
| Size | 48 cm (S) | 51 cm (M) | 54 cm (L) | 57 cm (XL) |
|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 9 missing
Bar width at the hoods, centre to centre.
| Size | 48 cm (S) | 51 cm (M) | 54 cm (L) | 57 cm (XL) |
|---|---|---|---|---|
| Cranks (mm) | ||||
| Bar width (mm) |
Cover, spacers and tyre (optional) 3 missing
A mandatory spacer is one that can’t be removed, for example because of internal hose routing.
Ronin 2025
7 missinggravel · steel · sizes 500–580 · how visitors see it now
I don’t have the stock build for this model.
| Size | 500 | 520 | 540 | 560 | 580 |
|---|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 11 missing
Bar width at the hoods, centre to centre.
| Size | 500 | 520 | 540 | 560 | 580 |
|---|---|---|---|---|---|
| Cranks (mm) | |||||
| Bar width (mm) |
Cover, spacers and tyre (optional) 4 missing
A mandatory spacer is one that can’t be removed, for example because of internal hose routing.
Models with all three values (1)
Ronin SL 2025
all filled ingravel · steel · sizes 50 cm–58 cm · how visitors see it now
Build: Ronin SL 2025-26
Cockpit: stem RITCHEY Comp 4-Axis + bars RITCHEY Road ErgoMax
Stem (mm): 50 cm 70, 52 cm 70, 54 cm 90, 56 cm 90, 58 cm 90 · Angle −6° · Bar reach 72 mm
| Size | 50 cm | 52 cm | 54 cm | 56 cm | 58 cm |
|---|---|---|---|---|---|
| Stem (mm) |
Cranks, bar width and seatpost setback (optional) 1 missing
Bar width at the hoods, centre to centre.
| Size | 50 cm | 52 cm | 54 cm | 56 cm | 58 cm |
|---|---|---|---|---|---|
| Cranks (mm) | |||||
| Bar width (mm) |
Cover, spacers and tyre (optional) 4 missing
A mandatory spacer is one that can’t be removed, for example because of internal hose routing.