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 ?
Thompson Grammont SL2 2026 geometry in sizes XS–XXL: stack 513–617 mm, reach 373–406 mm, head angle 72–73.5°.
| XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|
| Stack | 513 mm | 532 mm | 551 mm | 572 mm | 593 mm | 617 mm |
| Reach | 373 mm | 377 mm | 385 mm | 393 mm | 398 mm | 406 mm |
| Head angle | 72° | 72° | 72.5° | 73° | 73.5° | 73.5° |
| Seat angle | 74.5° | 74° | 73.5° | 73.5° | 73° | 72.5° |
| Seat tube (c-t) | 450 mm | 470 mm | 490 mm | 510 mm | 540 mm | 560 mm |
| Head tube | 100 mm | 120 mm | 140 mm | 160 mm | 180 mm | 205 mm |
| Top tube (effective) | 515 mm | 530 mm | 548 mm | 562 mm | 579 mm | 600 mm |
| BB drop | 75 mm | 75 mm | 73 mm | 73 mm | 73 mm | 73 mm |
| Chainstay | 413 mm | 413 mm | 413 mm | 413 mm | 413 mm | 413 mm |
| Wheelbase | 971 mm | 981 mm | 991 mm | 1001 mm | 1007 mm | 1022 mm |
| Fork offset | 47 mm | 47 mm | 47 mm | 47 mm | 47 mm | 47 mm |
Source: thompson-bikebuilder.be, checked 7 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 513 / reach 373 mm).
Stack and reach within 12 mm of size S (stack 532 / reach 377 mm).
Stack and reach within 12 mm of size M (stack 551 / reach 385 mm).
Stack and reach within 12 mm of size L (stack 572 / reach 393 mm).
Stack and reach within 12 mm of size XL (stack 593 / reach 398 mm).
Stack and reach within 12 mm of size XXL (stack 617 / reach 406 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