One of the most common questions most mountain bikers ask is how to find the perfect mountain bike sizing for their comfortable rides. Finding the fitted sizing bike is an important step that every rider shouldn’t overlook as it highly affects your comfort and performance during the rides.

Understanding that “finding a perfect size” might not be an easy task for some riders, we decided to write an article that will give you an insight into how mountain bikes are sized and when to size up or size down your mountain bike. To not miss any important information, read this article carefully and put it on the bookmark if necessary.

Mountain Bike Size Chart

Cyclist mountain biking with perfect fit MTB

Different bike manufacturers might have various sizing charts for their bike products. It is essential to research the bike’s manufacturer’s website to get accurate information. Besides, different types of bikes will probably have different sizing. For example, the road bike size chart will be different from the mountain bike size chart.

Generally, the most common measurement for sizing is determining the mountain bike size chart by height. Some manufacturers will measure in feet length while others might use centimeters. For Asians, the measurement of height in centimeters will be more understandable.

In this article today, we will be giving the mountain bike size chart cm from the Polygon bikes; they are:

The Full Suspension Mountain Bike

Polygon full suspension mountain bike

The full suspension mountain bike of Polygon is divided into Polygon Siskiu Series (Polygon Siskiu D5, Siskiu D6, Siskiu D7, Siskiu T7, Siskiu T8, and Siskiu N9) and Polygon Rayz series.

The Siskiu D6, Siskiu D7, Siskiu T7, Siskiu T8, and Siskiu N9 are divided into 27.5-inches wheel sizes and 29-inches wheel sizes which means both have different sizing charts.

Here is the Polygon Siskiu series 27.5 mountain bike size chart:

Height in Centimeters Bike Sizing Chart
152.5cm to 165cm S
162.5cm to 175cm M

While the Polygon Siskiu series 29er mountain bike sizing chart is:

Height in Centimeters Bike Sizing Chart
162.5cm to 175cm M
172.5cm to 185cm L
182.5cm to 195cm XL

The Polygon Siskiu D5 mountain bike sizing is as this following:

Height in Centimeters Bike Sizing Chart
152.5cm to 165cm S
162.5cm to 175cm M
172.5cm to 185cm L

Here are the Polygon Rayz 1 and Rayz 3’s bike sizing:

Height in Centimeters Bike Sizing Chart
152.5cm to 165cm S

The Hardtail Mountain Bike Sizing

Cyclist conquer trails with hartail mountain bike

The hardtail mountain bike of Polygon is grouped by the Polygon Syncline series (Polygon Syncline C2, Syncline C3, and Syncline C5), Polygon Xtrada series (Xtrada 5, Xtrada 6, and Xtrada 7), Polygon Premier series (Polygon Premier 4 and Premier 5), and Polygon Cascade series (Polygon Cascade 2, Cascade 3, and Cascade 4).

The Polygon Syncline and Xtrada series are coming with 27-inches wheel sizes, and 29-inches wheel sizes options.

The 27-inches wheel size chart is:

Height in Centimeters Bike Sizing Chart
152.5cm to 165cm S
162.5cm to 175cm M

While the 29-inches wheel size chart is:

Height in Centimeters Bike Sizing Chart
162.5cm to 175cm M
172.5cm to 185cm L
182.5cm to 195cm XL

The Premier series and Cascade 4 chart sizing are:

Height in Centimeters Bike Sizing Chart
152.5cm to 165cm S
162.5cm to 175cm M
172.5cm to 185cm L

The Cascade 3 series bike sizing is as follows:

Height in Centimeters Bike Sizing Chart
152.5cm to 165cm S
162.5cm to 175cm M

The Cascade 2 series bike sizing can be seen in the table below:

Height in Centimeters Bike Sizing Chart
162.5cm to 175cm M

How Are Mountain Bikes Sized?

As you can see from the lists in the table above, the bike is sized with the Small, Medium, Large, and Extra Large (XL) sizing. In most cases, the bike frame is the only thing that changes when you choose size, while the other components like suspension and wheel will remain the same.

The traditional method of bike sizing is adjusting seat tube length. However, the mountain bike in modern days has come with a unique and interesting shape, making the seat tube no longer the relevant measurement to find the ideal measurement for your mountain bike.

Instead, you can use the following key indicator as your mountain bike sizing calculator to find the perfect fit:

The Effective Top Tube Length

Bike frame geometry

Effective top tube length describes the horizontal distance between the head tube and seat tube, regardless if your top tube is straight or slipped down. Effective top tube length can indicate how long a bike will feel when seated.

Reach

Cyclist with her Polygon full suspension mountain bike

The MTB reach calculator is a measurement that counts the distance from the center of the bottom bracket to the center of the head tube in a horizontal line. The reach indicator is to identify how long the bike feels while riders are out of the saddle performing the common position during descents or climbing through steep singletrack.

Stand Over Height

Stand over explaination

Another indicator to see whether or not a bike sizing has fitted the riders is by measuring the stand-over height. To begin with, riders will have to straddle the bike with their feet placed flat on the floor. When the rider lifts a mountain bike, there should be clearance around a minimum of 2″ between the tires and the ground that allow riders to be comfortable getting off the saddle for quick dismount on the trail.

When evaluating the standover height, you might need to wear your cycling shoes as it might affect the overall leg length of riders.

Sizing Up Or Sizing Down Your Mountain Bike

Now that you have already gotten the detailed information of your desired bike sizing chart, but it happens to be your height is in between two sizes, which one should you get then? A smaller-sized mountain bike will have a shorter reach and a slightly shorter wheelbase. The standover height will be a bit lower, and the rider might have to extend the seat post to get into a comfortable riding position.

If you have longer legs proportionally, are not as flexible, or simply looking for a more upright riding position, the shorter size might offer more comfort for you. Besides, the shorter bikes will be easier to ride for longer periods. To summarize, if you are the type of rider who is less flexible but still seeking adjustable riding or looking for a more relaxed riding position, sizing down your mountain bike will be a greater option.

On the other hand, when you are sizing a mountain bike, the reach tends to be one factor that changes between the Small and Large bike sizing. If you have a longer torso, are flexible, or prefer to pick up over the terrain you have been riding on instead of flick your way around it, sizing up your bike will probably be the best choice.

Conclusion

Mountain biking with fun

Finding the perfect bike sizing will offer you more comfort and easier to handle trails while going faster with more control to increase your confidence during the ride. However, each bike manufacturer will have different sizing, so you must research the bike sizing chart before buying your bike.

Or, you can visit Rodalink bicycle shop near you and let the professional and experienced team help you choose the perfect sized bike according to your height and riding preferences. The team at Rodalink’s one-stop cycling shop will also help you to adjust the bike to suit you if needed.

Besides, only at Rodalink will you find various types of bikes that suit any of your riding styles built with the best quality components at an affordable price. You can also buy your desired bike now and pay for it later by using Shop Back as the payment method with a 0% of interest charge fee. Stop overthinking and start your biking journey together with Rodalink.

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