Good to know: Integrated cockpit
Integrated cockpit (a one-piece bar and stem) on at least one build. Changing the length means replacing the whole cockpit, and not every length exists. Check which length the bike actually ships with before you buy.
Geometry ?
Radon Vaillant 2026 geometry in sizes XS–XL: stack 517–599 mm, reach 374–404 mm, head angle 72–73.2°.
| XS | S | M | L | XL | |
|---|---|---|---|---|---|
| Stack | 517 mm | 540 mm | 557 mm | 577 mm | 599 mm |
| Reach | 374 mm | 380 mm | 388 mm | 396 mm | 404 mm |
| Head angle | 72° | 72.2° | 72.8° | 73° | 73.2° |
| Seat angle | 74.8° | 74.8° | 73.8° | 73.2° | 72.8° |
| Seat tube (c-t) | 470 mm | 500 mm | 530 mm | 560 mm | 590 mm |
| Head tube | 107 mm | 130 mm | 148 mm | 168 mm | 190 mm |
| Top tube (effective) | 515 mm | 532 mm | 550 mm | 570 mm | 590 mm |
| BB drop | 70 mm | 70 mm | 68 mm | 68 mm | 68 mm |
| Chainstay | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm |
| Wheelbase | 976 mm | 986 mm | 996 mm | 1008 mm | 1020 mm |
| Stock build by size | |||||
| Cranks | 170 mm | 172.5 mm | 172.5 mm | 175 mm | 175 mm |
| Stem | 90 mm | 90 mm | 100 mm | 100 mm | 110 mm |
| Bar width | 400 mm | 400 mm | 420 mm | 420 mm | 440 mm |
Source: radon-bikes.de, checked 3 Nov 2026 · bar position: worked out from published data
An older model year in the archive with the same stack, reach and head angle: 2024. Source: granfondo-cycling.com
Stock build
Vaillant 8.0 €3,199
- Groupset
- Shimano 105 Di2 RD-R7150, 12-speed
- Shifters
- Shimano 105 Di2 ST-R7170, 2×12
- Cranks
- Shimano 105 FC-R7100, 52/36T
- Handlebar
- VAILLANT Aero Carbon stem-handlebar unit
- Seatpost
- VAILLANT Carbon Seatpost, 350 mm
- Saddle
- Selle Italia Model, Superflow
- List price
- €3,199 (radon-bikes.de, 3 Nov 2026)
Vaillant 10.0 €4,499
- Groupset
- SRAM Force AXS E1, 12-speed
- Shifters
- SRAM Force AXS E1 HRD, 2×12
- Cranks
- SRAM Force AXS Spider E1 Carbon, Powermeter, DUB, 50/37T
- Handlebar
- VAILLANT Aero Carbon stem-handlebar unit
- Seatpost
- VAILLANT Carbon Seatpost, 350 mm
- Saddle
- Selle Italia SLR Boost Kit Carbonio Superflow
- List price
- €4,499 (radon-bikes.de, 3 Nov 2026)
Vaillant 9.0 €3,999
- Groupset
- Shimano ULTEGRA Di2 RD-R8150, 12-speed
- Shifters
- Shimano ULTEGRA Di2 ST-R8170, 2×12
- Cranks
- Shimano ULTEGRA FC-R8100, 52/36T
- Handlebar
- VAILLANT Aero Carbon stem-handlebar unit
- Seatpost
- VAILLANT Carbon Seatpost, 350 mm
- Saddle
- Selle Italia SLR Boost TM Superflow
- List price
- €3,999 (radon-bikes.de, 3 Nov 2026)
Source for all builds: radon-bikes.de, checked 3 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size XS (stack 517 / reach 374 mm).
Stack and reach within 12 mm of size S (stack 540 / reach 380 mm).
Stack and reach within 12 mm of size M (stack 557 / reach 388 mm).
Stack and reach within 12 mm of size L (stack 577 / reach 396 mm).
Stack and reach within 12 mm of size XL (stack 599 / reach 404 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