What Size Mountain Bike


Size mountain bike
Size mountain bike

One of the most important things to consider when purchasing a mountain bike is choosing one with the appropriate size. I wouldn’t advise you to buy any until you have read this article that explains what size mountain bike you can get. Getting the right size is appropriate to ensure comfort and balance.

A mountain bike with the correct size is one that can be ridden with excellent stability and balance, while anyone that is of a smaller size can cause discomforts, stress and even injury when riding. So if you’re wondering “what size mountain bike”, I bet this article is for you.

Mountain Bike Analysis

No two human beings can be the same; we vary in various ways, our size, character, abilities, and height even the color of our skin. The same goes for mountain bikes. Therefore, to know what size mountain bike, it is essential to understand the analysis of a mountain bike, beginning with its anatomy.

The Size of the Frame

One thing to note as an experienced rider is that no matter how similar tow bikes look, their fits and balance are always different. When you ride on both bikes, you’ll discover that they feel different. It is due to their frame size.

Most of these frame sizes displayed by most bike producers can be so perplexed. Typically, the usual way is to display the length of the seat tube, but there are still variations, because most measurements begin from bottom to the top of the seat tube, while others start from the bottom and end at the mid-section where the seat tube is connected to the top tube.

Many mountain bike producers display their products as L, S and M, possibly with XL/XS at the edge. When purchasing a mountain bike, two essential factors to consider when focusing on frame size is the length of the seat tube and the length of the top tube.

The Length of the Seat Tube and Stand-over

There should be an appropriate stand-over space over the seat tube and a utilizable stand-over allowance. For this to be achievable, do the following:

  • Stand over the bike backwards
  • While on the bike, make sure the space between your crotch and your top tube is up to 1 inches or more

If you have done these, you will discover that your frame will assist you with different alterations and adjustability at the seat, which makes it easy to get your maximum seat height.

The Length and Reach of the Top Tube

Another aspect to consider is the length of the top tube. The length of the top tube in conjunction with the length of the stem, the seat setting and handlebar setting, all play a vital role in the balance, effectiveness and comfort of your body when riding. When talking about the length of the top tube, the top tube that slopes down isn’t what should bother you, instead, a straight line from the mid-top section of the top tube, to the mid-section of the seat support.

How do you find the right Frame Size?

Just like most components on a mountain bike, there is no perfect fix. The adjustments of your handlebar, stems and seat are reasonable to some extent so that you can be able to switch from discomfort to comfort.

It is where it is advisable to pay closer attention to the producer’s size outline. They consist of various heights of every bike frame they manufacture. The table below illustrates a few:

Bike Size 13 to 14 inches (XS)


Common for riders between the range of 5ft – 5ft 4inches


Bike Size 14 to 16 inches (S)


Common for riders between the range of 5ft 4inches – 5ft 7inches

Bike Size 16 to 18 inches (M)


Common for riders between the range of 5ft 7inches – 5ft 10inches

Bike Size 18 to 20 inches (L)


Common for riders between the range of 5ft 10inches – 6ft 1inches

Bike Size 20 to 22 inches (XL)


Common for riders over 6ft 1inches

Frame Size Issues

When considering frame size, you need to be aware of the standover allowance, handlebar and stem lengths. Once the frame is too big or too small, it becomes a problem. It could result in some issues like these:



  • It inflicts Bruises to your back, from stretching too much during a ride
  • Inadequate stand-over allowance can lead to painful shocks and cramp on your laps
  • You lose control of your bike


  • Results in injury and cramps during extensive rides
  • You will experience toe overlapping issues
  • The stand over allowance is too much-causing backache during long rides

Other Necessary Adjustments

Overall, nothing is more important than the balance of the bike and the way you feel when you are riding. You can start by trying out different frame sizes by doing demo rides; some stores can allow this as long as you are sure of purchasing them after these trials. You can also try out a variety of mountain bikes.

Also, make sure that the contact points of your mountain bike are in order. Aspects like your seat, handlebar and the foot pedal, they all need to be well fitted. However, these fittings are adjustable, you can adjust them to suit your required taste, but be careful, these adjustments can also affect your mountain bike. Be cautious when making alterations.


When it comes to getting a mountain bike, understanding what size mountain bike is one of the first things that should come to your mind. The focus of this article is for you to have the technical know-how associated with mountain bike sizes. It will enable you to be able to select the right size that will ensure your comfort and efficiency when riding.

You have to be cautious of your frame size, the length of the top tube,┬áthe seat tube length and stand-over allowance. All these play a significant role in helping you understand what size mountain bike is right for you. When purchasing a mountain bike, you should also take note of the manufacturer’s outline or chart as illustrated in this article. It will help you immensely.

Size mountain bike
Size mountain bike

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