Good to know: Configurable build
Configurable build (at least partly: the cockpit or bar width, for example). The stock build below is only one of the options.
Geometry ?
Ridley Helium Disc 2026 geometry in sizes XXS–XL: stack 507–624 mm, reach 374–403 mm, head angle 71.8–74°.
| XXS | XS | S | M | L | XL | |
|---|---|---|---|---|---|---|
| Stack | 507 mm | 527 mm | 542 mm | 573 mm | 599 mm | 624 mm |
| Reach | 379 mm | 374 mm | 384 mm | 390 mm | 396 mm | 403 mm |
| Head angle | 71.8° | 72° | 73° | 73.5° | 73.5° | 74° |
| Seat angle | 75° | 74° | 73.5° | 73° | 72.5° | 72.5° |
| Seat tube (c-t) | 450 mm | 480 mm | 510 mm | 540 mm | 570 mm | 600 mm |
| Head tube | 110 mm | 130 mm | 145 mm | 175 mm | 205 mm | 230 mm |
| Top tube (effective) | 515 mm | 525 mm | 545 mm | 565 mm | 585 mm | 600 mm |
| BB drop | 68 mm | 68 mm | 66 mm | 66 mm | 63 mm | 63 mm |
| Chainstay | 405 mm | 405 mm | 405 mm | 405 mm | 408 mm | 408 mm |
| Wheelbase | 970 mm | 970 mm | 977 mm | 987 mm | 1005 mm | 1014 mm |
| Stock build by size | ||||||
| Cranks | – | – | – | 172.5 mm | – | – |
| Stem | – | – | – | 110 mm | – | – |
| Bar width | – | – | – | 420 mm | – | – |
| Seatpost setback | – | – | – | 10 mm | – | – |
Source: ridley-bikes.com, checked 1 Nov 2026 · bar position: worked out from published data
Older model years in the archive with the same stack, reach and head angle: 2018–2025. Source: bikeradar.com
Stock build
Helium Disc 105 2x11
- Groupset
- Shimano 105 2×11
- Cranks
- Shimano 105 R7000 50-34
- Stem
- Deda Super Box
- Handlebar
- Deda Zero2
- Seatpost
- Forza Cirrus Carbon-Alloy 27.2
- Saddle
- Selle Italia Model X
Source: ridley-bikes.com, checked 1 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size XXS (stack 507 / reach 379 mm).
Stack and reach within 12 mm of size XS (stack 527 / reach 374 mm).
Stack and reach within 12 mm of size S (stack 542 / reach 384 mm).
Stack and reach within 12 mm of size M (stack 573 / reach 390 mm).
Stack and reach within 12 mm of size L (stack 599 / reach 396 mm).
Stack and reach within 12 mm of size XL (stack 624 / reach 403 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 15 values for this model’s stem and bars. Add them