| Helmet size | Fit range (cm) | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 |
| Toddler | 46-50 | Toddler | ||||||||||||||||||||
| Child | 48-52 | Child | ||||||||||||||||||||
| Youth/XS | 50-55 | Youth/XS | ||||||||||||||||||||
| Small | 51-57 | Small | ||||||||||||||||||||
| S/M | 51-58 | S/M | ||||||||||||||||||||
| Medium | 54-60 | Medium | ||||||||||||||||||||
| M/L | 55-61 | M/L | ||||||||||||||||||||
| Large | 58-63 | Large | ||||||||||||||||||||
| X-Large | 60-66 | X-Large | ||||||||||||||||||||
Bontrager shoe sizing
The Size Conversion Chart below shows how Bontrager's sizing compares to other common sizing scales. However, because the fit of Bontrager cycling shoes is optimised for on-bike comfort and performance, your Bontrager shoe size may be different than that of your street shoe or athletic shoe sizing. For the best results, visit your local Bontrager shoe retailer.
The chart below also includes a foot-length conversion scale (in both inches and cm). Follow the steps to measure your foot length correctly and then consult the conversion chart to determine your Bontrager shoe size.
| EU | 36 | 37 | 37.5 | 38 | 38.5 | 39 | 39.5 | 40 | 40.5 | 41 | 41.5 | 42 | 42.5 | 43 | 43.5 | 44 | 44.5 | 45 | 45.5 | 46 | 46.5 | 47 | 48 | 49 |
| US Men | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 14.5 | 15 |
| US Women | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | ||||||||||
| UK Men | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 |
| UK Women | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | ||||||||||
| CM | 23 | 23.7 | 24 | 24.3 | 24.7 | 25 | 25.3 | 25.7 | 26 | 26.3 | 26.7 | 27 | 27.3 | 27.7 | 28 | 28.3 | 28.7 | 29 | 29.3 | 29.7 | 30 | 30.3 | 31 | 31.7 |
| Heel-to-Toe (cm) | 22.4 | 23.1 | 23.4 | 23.7 | 24.0 | 24.3 | 24.6 | 25.0 | 25.3 | 25.5 | 25.9 | 26.2 | 26.5 | 26.9 | 27.1 | 27.4 | 27.8 | 28.1 | 28.3 | 28.7 | 29.0 | 29.3 | 29.9 | 30.6 |
Determining your Bontrager shoe size
Don't have a Brannock device at home? Not to worry, follow the instructions below for at-home sizing or pop into your local Trek retailer to be properly measured.
Step 1
To measure your feet, start by wearing the socks that you typically ride in and lay a blank piece of paper on a hard, smooth surface.
Step 2
While standing, distribute your weight evenly and have someone trace each foot with a pencil taking extra care around the toes and heel areas.
Step 3
If you are working alone, sit down on a chair and lean forward to shift more weight onto the foot you are going to trace.
Step 4
On your outline, measure the distance from the heel line to your longest toe line and cross-reference with our sizing chart above. If your feet are different lengths, use the longer of the two measurements.
