Orbea Terra geometryGravel · 2027 · 6 sizes, from XS to XXL
The Orbea Terra is a gravel bike available in 6 sizes, from XS to XXL. Stack ranges from 514.9 to 625 mm and reach from 375 to 409 mm. Its geometry is low and long, with a racing fit. All sizes share 420 mm chainstays.
What size Terra 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 Orbea. The ones that matter most for choosing a size are in bold.
| Size | XS | S | M | L | XL | XXL |
|---|---|---|---|---|---|---|
| Stack | 515 | 540 | 560 | 580 | 600 | 625 |
| Reach | 375 | 383 | 389 | 395 | 402 | 409 |
| Effective top tube | 523 | 538 | 555 | 567 | 585 | 600 |
| Seat tube (centre-to-top) | 405 | 440 | 470 | 505 | 540 | 575 |
| Head tube length | 95 | 120 | 139 | 162 | 181 | 205 |
| Head angle | 70.0° | 70.5° | 71.0° | 71.0° | 71.5° | 72.0° |
| Chainstay length | 420 | 420 | 420 | 420 | 420 | 420 |
| Wheelbase | 1,005 | 1,018 | 1,026 | 1,040 | 1,048 | 1,058 |
| BB drop | 78 | 78 | 78 | 78 | 78 | 78 |
| BB height | 266 | 266 | 266 | 266 | 266 | 266 |
| Fork length | 390 | 390 | 390 | 390 | 390 | 390 |
| Fork offset | 55 | 55 | 55 | 55 | 55 | 55 |
| Trail | 66 | 62 | 59 | 59 | 56 | 53 |
| Standover | 680 | 711 | 735 | 765 | 791 | 821 |
| Seat angle (method not stated) | 74.0° | 74.0° | 73.5° | 73.5° | 73.0° | 73.0° |
Source: Orbea 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 Terra 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 514.9/375 mm in size XS to 625/409 mm in size XXL). 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 Terra in size M?
Stack of 560.3 mm and reach of 389 mm, with an effective top tube of 555 mm and a head angle of 71.0°.
Is the Terra a racing or an endurance bike?
Racing. In size M its stack-to-reach ratio is at percentile 32 of gravel bikes: a low, stretched position.