Geometry ?
X-LAB GT8 2026 geometry in sizes XS–XXL: stack 519–631 mm, reach 370–408 mm, head angle 70–71°.
| XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|
| Stack | 519 mm | 540 mm | 565 mm | 584 mm | 607 mm | 631 mm |
| Reach | 370 mm | 379 mm | 384 mm | 392 mm | 399 mm | 408 mm |
| Head angle | 70° | 70° | 71° | 71° | 71° | 71° |
| Seat angle | 76° | 75° | 74° | 74° | 73° | 73° |
| Seat tube (?) | 435 mm | 447 mm | 471 mm | 491 mm | 532 mm | 577 mm |
| Head tube | 80 mm | 100 mm | 120 mm | 140 mm | 165 mm | 190 mm |
| Top tube (effective) | 506 mm | 525 mm | 547 mm | 566 mm | 585 mm | 605 mm |
| BB drop | 80 mm | 80 mm | 80 mm | 80 mm | 80 mm | 80 mm |
| Chainstay | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1020 mm | 1032 mm | 1031 mm | 1046 mm | 1061 mm | 1078 mm |
| Standover | 715 mm | 730 mm | 755 mm | 773 mm | 807 mm | 838 mm |
| Fork offset | 55 mm | 55 mm | 50 mm | 50 mm | 50 mm | 50 mm |
| Stock build by size | ||||||
| Cranks | 165 mm | 165 mm | 170 mm | 170 mm | 172.5 mm | 172.5 mm |
| Stem | 70 mm | 70 mm | 80 mm | 90 mm | 100 mm | 100 mm |
| Bar width | 370 mm | 370 mm | 390 mm | 390 mm | 410 mm | 410 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: xds.co, checked 7 Nov 2026 · bar position: worked out from published data
Stock build
GT8 Shimano GRX Di2 1x12 ≈ €2,943
- Groupset
- Shimano GRX Di2 RX717 1×12, kazeta CS-M6200 10-51T
- Shifters
- Shimano GRX Di2 ST-RX717
- Cranks
- Branta Alloy Power Meter Crankset 40T
- Stem
- Branta Carbon Stem
- Handlebar
- Branta Gravel Carbon Handlebar
- Seatpost
- XDS Carbon 27.2 mm
- Saddle
- Fizik Terra Argo X7
- List price
- US$3,199 (xds.co, 7 Nov 2026)
Source: xds.co, checked 7 Nov 2026
Frames with similar geometry
Stack and reach within 12 mm of size XS (stack 519 / reach 370 mm).
Stack and reach within 12 mm of size S (stack 540 / reach 379 mm).
Stack and reach within 12 mm of size M (stack 565 / reach 384 mm).
Stack and reach within 12 mm of size L (stack 584 / reach 392 mm).
Stack and reach within 12 mm of size XL (stack 607 / reach 399 mm).
Stack and reach within 12 mm of size XXL (stack 631 / reach 408 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