This guide provides a detailed sizing chart to help you find the correct Trek Emonda size.
The current model has an H1.5 fit, which Trek claims is the optimal race position for racers. The aggressive geometry places you in a lower and more stretched position than the H2 fit, found on the Emonda ALR.
According to Trek, they introduced a smaller frame (size 47) to cater to a broader range of riders, regardless of gender, body type, riding style, or ability since 2020. The Trek Emonda is now available in eight frame sizes for cyclists from 5’0″ to 6’5″ (152 to 195cm) tall.
|Bike size||Rider height (in)||Rider height (cm)||Rider inseam (in)||Rider inseam (cm)|
|47||5’0″ – 5’2″||152 – 158||28.0″ – 29.5″||71 – 75|
|50||5’2″ – 5’4″||158 – 163||29.1″ – 30.3″||74 – 77|
|52||5’4″ – 5’6″||163 – 168||29.9″ – 31.1″||76 – 79|
|54||5’6″ – 5’9″||168 – 174||30.7″ – 32.3″||78 – 82|
|56||5’9″ – 5’11”||174 – 180||31.9″ – 33.5″||81 – 85|
|58||5’11” – 6’1″||180 – 185||33.1″ – 34.3″||84 – 87|
|60||6’1″ – 6’3″||185 – 190||33.9″ – 35.4″||86 – 90|
|62||6’3″ – 6’5″||190 – 195||35.0″ – 36.2″||89 – 92|
Other factors to consider beyond height
Here are important things to consider from my experience working at the bike shop, helping hundreds of customers get their right bike size.
Sizing is different across brands
It’s important to understand that bike sizing isn’t universal across brands. While Trek labels its road bikes with numbers like 47, 50, 52, 54, 56, 58, 60, and 62, these might differ compared to brands like Cervelo or Specialized.
Always ensure you’re comparing like-for-like when considering sizes across different brands.
Understand the frame’s stack and reach measurements
Two critical measurements come into play; Stack and Reach to truly compare like-for-like between brands.
If you have a bike that fits you well and is comfortable, use that as a reference point. Find out its Stack and Reach measurements and compare them against the Trek Emonda’s. Pick the closest size.
- Stack is the vertical distance from the bottom bracket to the top of the head tube. Stack height influences how high your handlebars will be relative to your saddle. A higher stack leads to a more upright riding position, which can be more comfortable, especially for longer rides, older riders, and those with less flexibility on the lower back.
- Reach is the horizontal distance from the bottom bracket to the center of the head tube. It determines how stretched or compact your riding position will be. A longer reach results in a more stretched-out, aggressive riding posture, while a shorter reach promotes a more upright position.
The Stack and Reach measurements are on the frame geometry chart below.
Inseam is another key measurement
Your inseam plays a pivotal role in determining the right bike size. Here’s a step-by-step guide to measuring it accurately.
- Stand barefoot with your back against a wall, feet 6 to 8” apart.
- Place a book spine upwards between your legs, ensuring it’s snug against your crotch.
- Step away, keeping the book in position.
- Measure the distance from the floor to the top of the book spine.
For a visual guide, here’s a video demonstrating the process.
In-between sizes? Here’s what to do
Compared to road bike brands, the Trek Emonda sizing chart is relatively easy to understand. Nevertheless, there will be some cyclists that fall precisely on the upper end of the smaller size and lower end of the larger size.
If that’s you, there are many things to consider, such as your legs-to-torso proportions and the final look of the bike, taking into consideration the number of spacers, stem length, and the amount of exposed seatpost.
Generally, I’d recommend sizing down for most cyclists.
It’s easier to make a smaller frame bigger than vice versa. The smaller frame has more room to extend reach, and increase stack. However, there is a limit to these corrective measures to avoid having too many spacers (30mm+) or too much exposed seatpost, which makes the bike look out of proportion.
The smaller frame is also stiffer, more maneuverable, and marginally lighter. If set up right, it’ll have more exposed seatpost, leading to more comfort due to increased seatpost flex.
If you have a normal legs-to-torso proportion, opting for the smaller size would be a better choice.
- If you have longer legs with a shorter torso, consider sizing up to avoid having too much exposed seatpost.
- If you have short legs with a longer torso, consider sizing down and using a longer stem to extend reach.
Try before you buy
Visit your local Trek dealer to test different sizes to get a feel for what suits you best. Most large and reputable Trek dealers can provide a test ride if they have the bike in your size in their demo fleet.
Trek Emonda frame geometry (2017-2023)
The geometry chart below applies to all Trek Emonda frames from the following:
- Years: 2017, 2018, 2019, 2020, 2021, 2022, 2023
- Models: Trek Emonda SLR 9, 7, 6, SL 7, 6, 5
- Frame material: Carbon
Learn more about what the frame geometry measurements mean here.
|Rider Height (cm)||152 to 158||158 to 163||163 to 168||168 to 174||174 to 180||180 to 185||185 to 190||190 to 195|
|Rider Height (ft)||5’0″ to 5’2″||5’2″ to 5’4″||5’4″ to 5’6″||5’6″ to 5’9″||5’9″ to 5’11″||5’11″ to 6’1″||6’1″ to 6’3″||6’3 to 6’5″|
|Top Tube, Effective (mm)||512||521||534||543||559||574||586||598|
|Seat Tube (mm)||424||453||483||496||525||553||573||593|
|Seat Tube Angle||74.6°||74.6°||74.2°||73.7°||73.3°||73.0°||72.8°||72.5°|
|Head Tube (mm)||100||111||121||131||151||171||191||211|
|Head Tube Angle||72.1°||72.1°||72.8°||73.0°||73.5°||73.8°||73.9°||73.9°|
|BB Drop (mm)||72||72||72||70||70||68||68||68|
|Fork Offset (mm)||45||45||45||45||40||40||40||40|
|Fork Trail (mm)||68||62||58||56||58||57||56||56|
|Standover Height (mm)||692||711||732||744||768||793||811||829|
|Stem Length (mm)||70||80||90||90||100||110||110||110|
Bernard Lu has 7+ years of experience working in a bicycle shop, overseeing the retail and workshop operations. He’s a qualified bicycle mechanic who understands a cyclist’s needs and speaks the same cycling lingo.
If you meet him at the cafe, he will happily talk to you for hours about all the intricacies of bikes and cycling tech. Just buy him a coffee next time you see him.