Good to know: Integrated cockpit · Configurable build
Integrated cockpit (a one-piece bar and stem) on at least one build. Changing the length means replacing the whole cockpit, and not every length exists. Check which length the bike actually ships with before you buy.
Configurable build (at least partly: the cockpit or bar width, for example). The stock build below is only one of the options.
Geometry ?
De Rosa Merak 2026 geometry in sizes 425–565: stack 507–591 mm, reach 371–409 mm, head angle 70.7–73.4°.
| 425 | 445 | 465 | 480 | 505 | 525 | 545 | 565 | |
|---|---|---|---|---|---|---|---|---|
| Stack | 507 mm | 513 mm | 524 mm | 537 mm | 548 mm | 561 mm | 574 mm | 591 mm |
| Reach | 371 mm | 376 mm | 380 mm | 385 mm | 393 mm | 399 mm | 406 mm | 409 mm |
| Head angle | 70.7° | 71.4° | 72° | 72.6° | 73° | 73.1° | 73.3° | 73.4° |
| Seat angle | 74.9° | 74.5° | 74.1° | 73.9° | 73.9° | 73.7° | 73.5° | 73.1° |
| Head tube | 107 mm | 110.6 mm | 120 mm | 131.6 mm | 141.5 mm | 154.7 mm | 167.6 mm | 185 mm |
| Top tube (effective) | 508 mm | 518 mm | 529 mm | 540 mm | 551 mm | 563 mm | 576 mm | 589 mm |
| BB drop | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm |
| Chainstay | 405 mm | 405 mm | 405 mm | 405 mm | 405 mm | 405 mm | 405 mm | 405 mm |
| Wheelbase | 970.6 mm | 971.6 mm | 973.7 mm | 977.7 mm | 984.7 mm | 993.8 mm | 1002.9 mm | 1009.9 mm |
| Fork length | 371 mm | 371 mm | 371 mm | 371 mm | 371 mm | 371 mm | 371 mm | 371 mm |
| Fork offset | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm | 45 mm |
Source: derosa.it, checked 1 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 425 (stack 507 / reach 371 mm).
Stack and reach within 12 mm of size 445 (stack 513 / reach 376 mm).
Stack and reach within 12 mm of size 465 (stack 524 / reach 380 mm).
Stack and reach within 12 mm of size 480 (stack 537 / reach 385 mm).
Stack and reach within 12 mm of size 505 (stack 548 / reach 393 mm).
Stack and reach within 12 mm of size 525 (stack 561 / reach 399 mm).
Stack and reach within 12 mm of size 545 (stack 574 / reach 406 mm).
Stack and reach within 12 mm of size 565 (stack 591 / reach 409 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 10 values for this model’s stem and bars. Add them