Geometry ?
Twitter T8 2026 geometry in sizes 43.5–54: stack 506–562 mm, reach 360–402 mm, head angle 71–73°.
| 43.5 | 46 | 48 | 50 | 52 | 54 | |
|---|---|---|---|---|---|---|
| Stack | 506 mm | 510 mm | 517 mm | 528 mm | 545 mm | 562 mm |
| Reach | 360 mm | 376 mm | 387 mm | 390 mm | 395 mm | 402 mm |
| Head angle | 71° | 71° | 72.5° | 72.2° | 73° | 73° |
| Seat angle | 74.5° | 74.5° | 74° | 74° | 73° | 73° |
| Seat tube (c-t) | 435 mm | 460 mm | 480 mm | 500 mm | 520 mm | 540 mm |
| Head tube | 110 mm | 120 mm | 125 mm | 130 mm | 140 mm | 150 mm |
| Top tube (effective) | 500 mm | 517 mm | 535 mm | 541 mm | 561.6 mm | 573 mm |
| BB drop | 72 mm | 72 mm | 69.5 mm | 69.5 mm | 67 mm | 67 mm |
| Chainstay | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm |
| Fork offset | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
Source: twitterbikeusa.com, checked 13 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 43.5 (stack 506 / reach 360 mm).
Stack and reach within 12 mm of size 46 (stack 510 / reach 376 mm).
Stack and reach within 12 mm of size 48 (stack 517 / reach 387 mm).
Stack and reach within 12 mm of size 50 (stack 528 / reach 390 mm).
Stack and reach within 12 mm of size 52 (stack 545 / reach 395 mm).
Stack and reach within 12 mm of size 54 (stack 562 / reach 402 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