Geometry ?
Ventum GS1 2026 geometry in sizes XS–XL: stack 506–604 mm, reach 369–411 mm, head angle 69–72.5°.
| XS | S | M | M/L | L | XL | |
|---|---|---|---|---|---|---|
| Stack | 506 mm | 522 mm | 545 mm | 570 mm | 589 mm | 604 mm |
| Reach | 369 mm | 375 mm | 384 mm | 393 mm | 402 mm | 411 mm |
| Head angle | 69° | 69.5° | 70° | 71° | 72° | 72.5° |
| Seat angle | 74° | 74° | 73.5° | 73.5° | 73° | 73° |
| Seat tube (?) | 485 mm | 502 mm | 525 mm | 550 mm | 569 mm | 584 mm |
| Head tube | 90 mm | 105 mm | 128 mm | 150 mm | 166 mm | 180 mm |
| Top tube (effective) | 514 mm | 525 mm | 545 mm | 562 mm | 582 mm | 596 mm |
| BB drop | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm |
| Chainstay | 420 mm | 420 mm | 420 mm | 420 mm | 420 mm | 420 mm |
| Wheelbase | 1004 mm | 1012 mm | 1024 mm | 1032 mm | 1037 mm | 1046 mm |
| Standover | 778 mm | 795 mm | 817 mm | 841 mm | 860 mm | 874 mm |
| Fork length | 395 mm | 395 mm | 395 mm | 395 mm | 395 mm | 395 mm |
| Fork offset | 50 mm | 50 mm | 50 mm | 50 mm | 50 mm | 50 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: ventumracing.com, checked 12 Nov 2026 · bar position: worked out from published data
Stock build
I don’t have the build for each size yet.
Frames with similar geometry
Stack and reach within 12 mm of size XS (stack 506 / reach 369 mm).
Stack and reach within 12 mm of size S (stack 522 / reach 375 mm).
Stack and reach within 12 mm of size M (stack 545 / reach 384 mm).
Stack and reach within 12 mm of size M/L (stack 570 / reach 393 mm).
Stack and reach within 12 mm of size L (stack 589 / reach 402 mm).
Stack and reach within 12 mm of size XL (stack 604 / reach 411 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