You’re not alone if you’ve found yourself asking “What size mountain bike do I need?” Getting a properly fitting mountain bike is key to a good and safe time on the trails, but interpreting the geometry charts can feel like calculus. You can tweak smaller components to adjust the fit but you can’t change the frame itself, so it’s important to get the right size frame from the get-go.
So if you’re wondering how to pick the right size mountain bike, read along and we’ll walk you through the process. For riders coming from another cycling background, it’s important to note that mountain bike sizing is different than other kinds of bikes.
Mountain Bike Size Chart
车身高度（英寸） | 车身高度(cm) | 框架尺寸 | 框架尺寸（英寸） | 框架尺寸(cm) |
4‘10″-5’2“ | 148厘米-58厘米 | 特大 | 13 英寸 – 14 英寸 | 33CM-37CM |
5‘3″-5’6“ | 159厘米-168厘米 | 小号 | 15″-16″ | 38CM-42CM |
5‘7″-5’10“ | 169厘米-178厘米 | M | 17″-18″ | 43CM-47CM |
5‘11″-6’1“ | 179厘米-185厘米 | L | 19″-20″ | 48CM-52CM |
6‘2″-6’4“ | 186cm-193cm | XL | 21″-22″ | 53CM-57CM |
6’4“+ | 194cm+ | XXL | 23 英寸以上 | 58CM+ |
The best mountain bike for you, that fits correctly and is set up properly, will be a joy to ride, making it easier to tackle trails faster with more control. But a bike that’s too small can be twitchy, nervous, and uncomfortable on longer rides, technical descents, or when you’re just pootling along the flat.
We’ll also help you understand the changes you can make to your bike’s parts to help it perform better for your measurements, personal requirements, and preferred discipline. For example, the best mountain bike suspension forks can be adjusted to suit you.
Before we get started, if drop handlebars are your thing, then head to our guide to road bike sizing.
Smaller seat tube lengths mean shorter people can fit on bikes with a longer reach figure because they can adjust the seat height lower, opening up the potential to ride a larger bike.
It’s still important to consider seat tubes and top tube lengths when buying a bike. The seat tube length will dictate the lowest saddle height that can be set and the top tube length will roughly dictate how stretched out a rider will feel.
So, where do you find out what size frame you need? Like so many other things on a mountain bike, there is no one perfect solution because, within sensible limits, you can adjust your saddle, stem, and handlebar to help make a slightly imperfect fit feel fine.
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