Geometry ?
Twitter R5 Pro 2nd 2026 geometry in sizes XXS–XXL: stack 502–598 mm, reach 356–404 mm, head angle 70–73.5°.
| XXS | XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|---|
| Stack | 502 mm | 505 mm | 521 mm | 542 mm | 563 mm | 584 mm | 598 mm |
| Reach | 356 mm | 370 mm | 375 mm | 380 mm | 384 mm | 389 mm | 404 mm |
| Head angle | 70° | 71° | 72° | 72.5° | 73° | 73.5° | 73.5° |
| Seat angle | 75° | 75° | 74.5° | 74° | 73.5° | 73° | 73.2° |
| Seat tube (c-t) | 435 mm | 460 mm | 480 mm | 500 mm | 520 mm | 540 mm | 560 mm |
| Head tube | 100 mm | 100 mm | 115 mm | 135 mm | 155 mm | 175 mm | 190 mm |
| Top tube (effective) | 490 mm | 505 mm | 520 mm | 535 mm | 550 mm | 565 mm | 585 mm |
| BB drop | 72 mm | 72 mm | 72 mm | 72 mm | 72 mm | 72 mm | 72 mm |
| Chainstay | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm |
| Wheelbase | 981 mm | 981 mm | 994 mm | 1000 mm | 1005 mm | 1012 mm | 1031 mm |
| Fork offset | 55 mm | 55 mm | 55 mm | 55 mm | 55 mm | 55 mm | 55 mm |
Source: twitterbikeusa.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 XXS (stack 502 / reach 356 mm).
Stack and reach within 12 mm of size XS (stack 505 / reach 370 mm).
Stack and reach within 12 mm of size S (stack 521 / reach 375 mm).
Stack and reach within 12 mm of size M (stack 542 / reach 380 mm).
Stack and reach within 12 mm of size L (stack 563 / reach 384 mm).
Stack and reach within 12 mm of size XL (stack 584 / reach 389 mm).
Stack and reach within 12 mm of size XXL (stack 598 / 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 9 values for this model’s stem and bars. Add them