Mountain Bike Size Guide (What to Choose For You?)

Looking for assistance with the query, what size mountain bike do I need to buy? This mountain bike size guide has gotten all of these guidelines for this frequently asked question.

Buying the right mountain bike size is as important as opting for the right mountain bike brand. Suppose you have purchased a high-quality mountain bike with numerous advanced features and accessories, but trust me, you have wasted your amount if it doesn’t fit your size correctly.

So, what makes a need here? Yes, it would help if you had a proper size guideline before buying any mountain bike of your choice. Due to the coronavirus pandemic, many new riders are searching out fresh air, fitness, and a reason to get out of the house.

That’s the reason we have seen a rise in bike riding in 2021. So if you’re going to get in on the ride, buying a bike that doesn’t fit you is the last thing you want to do. Without any Mountain bike frame size guide, you can waste your money invested in a bike.

Let’s have a look at this extensive guide and get the exact ideas for your needs.

Wondering How to Pick the Right Size?

The most important thing that you have to put in your mind before you drop in on a shiny new ride is getting a correctly fitted mountain bike. So having the right size mountain bike from the get-go is even more critical.

It is essential to remember that mountain bikes’ scale is substantially different from road bikes and other Bicycles coming from other cycling backgrounds. If you would like to find out a lot about the new mountain range, bike size guide, and consider it when making a purchase go for these details.

Which Size Mountain Bike Do I Need to Purchase?

For reasonable cause, a question is always asked because one of the most important decisions you can make is to select the correct size of the bike. We advise you not to buy a new bike until you understand why that is so necessary to use something that is the right size for your height and body shape.

And to understand the modifications you can make to the parts of your bike to help it work better for your dimensions, personal specifications, and chosen discipline.

Tips on Finding Out Mountain Bike Size Fit for You

Working out the right mountain bike size for you is easy. All you need is:

  • Your height
  • Your inside leg length

A bike that suits properly and is correctly set up is a pleasure to ride, making it more comfortable with more control to tackle trails faster. Still, one that is too small can be twitchy, anxious, and awkward on longer runs, technical downhills, or just pootling along the flat. If you’re still unable to understand the mountain bike size guide completely, then go further.

Take a Look at How is Mountain Bikes Sized

Mountain bikes are either measured in inches or small or medium in total dimension. These bikes, measured from the middle of the front chain-ring to the top of the seat tube, are sized by the frame, and this is usually dependent on the length of the seat tube.

Mountain bike frames, however, do not always follow a traditional template, so that the measurement may be based on a virtual seat tube measurement. Sizes do vary slightly between manufacturers.

Would You Buy Your Bike Online?

This is much better, but it also helps to understand what to look for. Follow these steps, and in no time, you will be ready to hit the road (or the trails) on the right bike:

1. Consider the Bike Type

Remember, first, what kind of bike you want. Sizing differs widely between the road and mountain bikes and between models for men and women and individual manufacturers. Before determining what size you are right, you may want to be familiar with your desires and needs. Many vendors have sizing charts that will point you in the right direction.

2. Use Your Height

Although one of the more straightforward ways to get an idea of your frame size is to use your height as a reference, it won’t give you a perfect fit. It is just a great way to decide whether a frame will be too short or too tall. Manufacturers also provide a mountain Bike Frame Size Guide.

3. Invest in a Bike Fit

Having a professional bike fit will make all the difference before you purchase it. Mickey Erickson said it all If you buy a new bike from a bike store, order a bike online, or buy Craigslist off, it doesn’t matter; she’s telling.

Knowing the measurements of your suit and finding a fit expert helps you to walk through the process not only ensures that you get the right size, but also that your specific needs are met by a bike.”

Below is the Mountain Bike Size Guide

                    Height       Inside leg

Men’s mountain bike size

147cm-152cm / 4’10”-5’0″ 66cm / 26″ 13” (X Small)
152cm-160cm / 5’0″-5’3″ 69cm / 27″ 13”, 14” (X Small)
160cm-170cm / 5’3″-5’7″ 71cm / 28″ 15”, 16″ (Small)
170cm-175cm / 5’7″-5’9″ 76cm / 30″ 17″, 18” (Medium)
175cm-180cm / 5’9″-5’11” 79cm / 31″ 18”, 19″ (Medium, Large)
180cm-188cm / 5’11”-6’2″ 81cm / 32″ 19″, 20” (Large)
188cm-196cm / 6’2″-6’5″ 86cm / 34″ 20″, 21”, 22” (Large, X Large)
196cm+ / 6’5″+ 91cm / 36″ 23″, 24” (XX Large)


What Mountain Bike Size Should I Choose If I am Between Sizes?

Our bike sizing calculator will often propose two different choices for sizing. This ensures that the suggested larger and smaller sizes would also be appropriate. It’s a personal decision to choose which size to choose, but most mountain bikers prefer to select the larger scale.

You can (depending on the model) install a shorter stem to maximize the fit of a larger bike without adversely affecting the handling so you do not feel too stretched. This is the reverse of a road bike, where lengthening the stem rather than shortening it is more comfortable.

Mountain Bike Frame Size Guide and Geometry

Now that you know what happens when you’re up and down in height, go and try some bikes! Much like an average of 2 pairs of shoes, Similar bikes from different manufacturers can also match and feel differently from other brands, not the same. Moreover, you can read more here.

You can size up for one brand and size down for another, so go out with an open mind, a good understanding of your riding style, how you’re going to use the bike, and find the right fit for you!

Mountain Bike Size Guide: Things to Consider

Mountain bike geometry is the shape of the bike. Several separate and substantial dimensions make up the overall shape and geometry of your mountain bike. Reach and Stack is the two key measurements that will influence the way your bike will fit.

Bear in mind that while these words are from the world of track, triathlon & time trial, those numbers will not be transferred to your mountain bike from your tri-bike.

  • Reach
  • Stack
  • Head (Tube) Angle
  • Chainstay Length
  • Bottom Bracket Height
  • Wheelbase

1. Reach

The reach measurement is the horizontal distance between the bottom bracket and the middle of the head tube on a mountain bike. This is arguably the most significant mountain bike fit statistic because it affects your bike’s cockpit length as you stand on the pedals and how much range of motion you can use in your hips to maintain a healthy, stable riding position.

2. Stack

Stack, the vertical distance from the bottom bracket to the head tube’s bracket middle, is the next relevant mountain bike geometry measurement. This is essentially a seated pedaling place gauge and relative height of the handlebar. With headset spacers & handlebar elevation for increased stack height, this can be changed to a degree.

3. Head (Tube) Angle

The head angle, or head tube angle, is the angle between your mountain bike’s front fork and the deck. While other parameters go into what makes the front wheel behave, this industry’s key metric is to evaluate front-wheel characteristics (fork offset, trail, etc.). A lower number (e.g., 65 °) compared to a “steep” head angle is a “slack” mountain bike head angle.

4. Chainstay Length

For each rider, chainstay length preference is personal. The distance between the center of mass and the center of mass rider and the rear axle is determined effectively by this calculation. The rear wheel for bikes with short chainstays is closer to being “under” the rider.

Short chainstays allow the rider, with their weight, to be more dynamic. This implies more short manuals & wheelies and general ease to get the front wheel off the ground.

5. Bottom Bracket Height

The gap between the ground and the middle of the cranks is the bottom bracket height on your mountain bike. The vertical difference between the bracket at the bottom and the bracket wheel axles, “Lower Bracket Drop,” is referred to by some manufacturers.

They test the same mountain bike feature efficiently, which is how low your mass center is. Much like your lowered sports car, low-bottom bracket bikes corner like they’re on rails and seamlessly move from turn to turn.

6. Wheelbase

A variety of variables related to a mountain bike’s wheelbase length, including Head Tube Angle, Reach, and Chainstay Length, which we have previously addressed. The overall wheelbase is the culmination of both of these variables.

The trick to wheelbase is to improve stability by raising the gap between your front and rear axles, while shortening the wheelbase would make a bike more maneuverable.

Final Words

That’s a lot of details, and although we’ve only covered the basics, this should give you enough context to choose a mountain bike of the right size. That said, there is still no alternative to going out there and riding some bikes for checking.

There’s always a little bit of an inexplicable thing out there when choosing a mountain bike, an enigmatic link to a particular trip. So take this knowledge with a grain of salt, throw your leg over a couple of bikes, and go ride! It all suits and looks excellent.

Tom Fortune has been reviewing cycling products for several years from his home in the French Alps. As a freelance mountain bike wrtier, he mainly reviews mountain bike products but also reviews road cycling products independently.

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