Megamo Natural geometryMTB · 2026 · 4 sizes, from S to XL
The Megamo Natural is a mtb bike available in 4 sizes, from S to XL. Stack ranges from 600 to 633 mm and reach from 397 to 462 mm. Its geometry is tall and short, built for comfort. All sizes share 445 mm chainstays.
What size Natural 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 | S | M | L | XL |
|---|---|---|---|---|
| Stack | 600 | 609 | 619 | 633 |
| Reach | 397 | 419 | 442 | 462 |
| Head tube length | 95 | 105 | 115 | 130 |
| Head angle | 69.5° | 69.5° | 69.5° | 69.5° |
| Chainstay length | 445 | 445 | 445 | 445 |
| Top tube (method not stated) | 575 | 600 | 625 | 650 |
| Seat tube (method not stated) | 390 | 440 | 480 | 530 |
| Seat angle (method not stated) | 73.5° | 73.5° | 73.5° | 73.5° |
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 mtb bikes. Further right means more of that quality.
Bikes with similar geometry (size M)
The closest size of other mtb models, by stack and reach.
Frequently asked questions
What size Natural 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 600/397 mm in size S to 633/462 mm in size XL). 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 Natural in size M?
Stack of 609 mm and reach of 419 mm.
Is the Natural a racing or an endurance bike?
Endurance. In size M its stack-to-reach ratio is at percentile 80 of mtb bikes: a tall, short position.