Megamo Jakar geometryGravel · 2027 · 6 sizes, from XS to ONE SIZE
The Megamo Jakar is a gravel bike available in 6 sizes, from XS to ONE SIZE. Stack ranges from 527 to 632 mm and reach from 347 to 407 mm. Its geometry is tall and short, built for comfort. Data from 2027; geometry from 2026 is also available.
What size Jakar do I need?
Enter the stack and reach of a bike that fits you well and we will tell you which size is closest and how to set it up.
Enter your stack and reach to see which size fits you best.
Geometry chart by size
Measurements in mm and degrees, as published by Megamo. The ones that matter most for choosing a size are in bold.
| Size | XS | S | M | L | XL | ONE SIZE |
|---|---|---|---|---|---|---|
| Stack | 529 | 550 | 570 | 600 | 632 | 527 |
| Reach | 347 | 358 | 376 | 392 | 407 | 361 |
| Head tube length | 105 | 125 | 145 | 175 | 210 | 100 |
| Head angle | 70.0° | 70.5° | 71.0° | 71.0° | 71.0° | 70.0° |
| Chainstay length | 430 | 430 | 430 | 430 | 430 | 440 |
| Wheelbase | 992 | 1,004 | 1,026 | 1,051 | 1,078 | 1,009 |
| Top tube (method not stated) | 494 | 515 | 545 | 575 | 600 | 507 |
| Seat tube (method not stated) | 415 | 500 | 530 | 570 | 590 | 415 |
| Seat angle (method not stated) | 74.5° | 74.0° | 73.5° | 73.0° | 73.0° | 74.5° |
Source: Megamo official website · data from 11 Nov 2026. Spot a mistake?
Stack and reach of every size
Higher means a taller front end; further right means a longer reach. The blue dot is your search.
Character of each size
Compared with other gravel bikes. Further right means more of that quality.
Bikes with similar geometry (size M)
The closest size of other gravel models, by stack and reach.
Frequently asked questions
What size Jakar do I need?
It depends on your position, not just your height. The most reliable way is to compare the stack and reach of a bike that fits you with those of each size (from 529/347 mm in size XS to 527/361 mm in size ONE SIZE). The size finder on this page shows the closest size and the stem and spacers you would need.
What are the stack and reach of the Jakar in size M?
Stack of 570 mm and reach of 376 mm.
Is the Jakar a racing or an endurance bike?
Endurance. In size M its stack-to-reach ratio is at percentile 78 of gravel bikes: a tall, short position.