Trek Emonda Aluminium geometryRoad · 2023 · 8 sizes, from 47cm to 62cm
The Trek Emonda Aluminium is a road bike available in 8 sizes, from 47cm to 62cm. Stack ranges from 507 to 620 mm and reach from 373 to 403 mm. Its geometry is low and long, with a racing fit.
What size Emonda Aluminium 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 Trek. The ones that matter most for choosing a size are in bold.
| Size | 47cm | 50cm | 52cm | 54cm | 56cm | 58cm | 60cm | 62cm |
|---|---|---|---|---|---|---|---|---|
| Stack | 507 | 521 | 533 | 541 | 563 | 581 | 601 | 620 |
| Reach | 373 | 378 | 383 | 386 | 391 | 396 | 399 | 403 |
| Effective top tube | 512 | 521 | 534 | 543 | 559 | 574 | 586 | 598 |
| Head tube length | 100 | 111 | 121 | 131 | 151 | 171 | 191 | 211 |
| Head angle | 72.1° | 72.1° | 72.8° | 73.0° | 73.5° | 73.8° | 73.9° | 73.9° |
| Chainstay length | 410 | 410 | 410 | 410 | 410 | 411 | 411 | 412 |
| Wheelbase | 972 | 974 | 977 | 981 | 983 | 992 | 1,001 | 1,010 |
| BB drop | 72 | 72 | 72 | 70 | 70 | 68 | 68 | 68 |
| Fork offset | 45 | 45 | 45 | 45 | 40 | 40 | 40 | 40 |
| Trail | 68 | 62 | 58 | 56 | 58 | 57 | 56 | 56 |
| Standover | 692 | 711 | 732 | 744 | 768 | 793 | 811 | 829 |
| Seat tube (method not stated) | 424 | 453 | 483 | 496 | 525 | 553 | 573 | 593 |
| Seat angle (method not stated) | 74.6° | 74.6° | 74.2° | 73.7° | 73.3° | 73.0° | 72.8° | 72.5° |
Source: Trek 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 road bikes. Further right means more of that quality.
Bikes with similar geometry (size 54cm)
The closest size of other road models, by stack and reach.
Frequently asked questions
What size Emonda Aluminium 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 507/373 mm in size 47cm to 620/403 mm in size 62cm). 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 Emonda Aluminium in size 54cm?
Stack of 541 mm and reach of 386 mm, with an effective top tube of 543 mm and a head angle of 73.0°.
Is the Emonda Aluminium a racing or an endurance bike?
Racing. In size 54cm its stack-to-reach ratio is at percentile 27 of road bikes: a low, stretched position.