Sizing a Mountain Bike Frame
Use this chart as a baseline, then look at the size chart specific to the bike brand you’re considering, as bike sizes differ between brands.
While the bike frame size is the place to start, you’ll also want to consider geometry, intended use, and skill level to choose the right size. You can adjust smaller components to fit once you’ve found the right size frame.
*Keep in mind that mountain bike sizing is different from other kinds of bikes.
Rider Height (in) | Rider Height (cm) | Frame Size | Frame Size (in) | Frame Size (cm) |
4' 10" - 5' 2" | 148cm - 158cm | 13" - 14" | 33cm - 37cm | |
5' 3" - 5' 6" | 159cm - 168cm | 15" - 16" | 38cm - 42cm | |
5' 7" - 5' 10" | 169cm - 178cm | 17" - 18" | 43cm - 47cm | |
5' 11" - 6' 1" | 179cm - 185cm | 19" - 20" | 48cm - 52cm | |
6' 2" - 6' 4" | 186cm - 193cm | 21" - 22" | 53cm - 57cm | |
6' 4" + | 194cm + | 23" + | 58cm + |
How Are Mountain Bikes Sized?
Mountain bike sizes are categorized as Small, Medium, Large, and then manufacturers give their own size recommendations based roughly on your height.
Sizing Up Or Sizing Down Your Mountain Bike
If, based on your height, you find that you’re in between mountain bike sizes, you have two choices:
Sizing Up:
If you’re relatively strong and flexible, and your riding style is rather aggressive, you’ll want to size up for a challenge. Also, if you have a longer torso, size up to a longer wheelbase for a better fit. Keep in mind, the low riding position can be physically taxing.
Sizing Down:
Smaller-sized mountain bikes have a shorter reach and a slightly shorter wheelbase, so you might need to extend your seat-post in order to get the best pedaling position. Longer legs, less flexibility, or do you prefer a more upright position? You’ll likely find a shorter bike to be more comfortable and easier to ride for long periods.
Ride on!
