Knowing how to measure yourself for a bike can be the difference between developing a new favorite pastime and writing off cycling for good. Usually, your local bike outfitter has the know-how and bike sizing chart to point you to the bike you need, but there are a few personal preferences you’ll need to consider and communicate first:
- What type of bike are you looking to ride? Will it be mountain, road, hybrid or perhaps a cruiser?
- How tall are you?
- What’s your riding style? Do you prefer to ride more aggressively with greater maneuverability, or do you prefer a flatter and more leisurely ride?
The answers to these questions are essential to knowing how to choose a bike size that’s right for you. (Whether you measure yourself for a bike or decide to use the help of a bike outfitter, you should still consider these questions!)
After you’ve got your answers, it’s time to take some measurements.
Bike Sizing and Measurements
Traditionally, bikes are measured by the length of the seat tube in either inches or centimeters. Unfortunately, due to differing measurement methods by various bike brands this measurement alone is not reliable enough to answer the question: what size of bike do I need? This is why stand-over height and ape index should be two determining bike size factors when measuring yourself for a bike.
Stand-over Height
Stand-over height is the distance from the ground to the middle of the top tube.
Asking yourself what size frame do I need for a mountain bike or road bike? Then, stand-over height is the first factor you should take into consideration. As defined above, stand-over height is the distance measured from the ground to the top tube of the bike. It’s listed in most bike sizing charts. To determine the stand-over height, and thus frame size that is right for you, physically straddle the bike to make sure you clear the top tube by at least two inches.
Bike Sizing Chart
Whether shopping online or consulting the experts at your local bike shop, you’ll probably come across something called a bike sizing chart. These vary by brand and by type of bike.
Backroads has a different bike sizing chart for each bike type we supply. This chart helps us size and fit each rider with the perfect bike for his or her journey. Here’s a look at what a basic bike sizing chart looks like and how the measurements, such as height and stand-over height, factor in to the sizing decision:
Bike Sizing Chart XS S M L XL XXL Frame Size (A) 38cm 45cm 53cm 56cm 59cm 63cm Rider Height 4’11”-5’1” 5’2”-5’5” 5’5”-5’9” 5’9”-6’1” 6’1”-6’4” 6’4”-6’6” Stand-over Height 67.7cm/ 26.6” 71.5cm/ 28” 76.4cm/ 30” 78.7cm/ 31” 81.3cm/ 32” 84.4cm/ 33.2”
For a bike sizing chart specific to the type of bike you will be riding or shopping for, visit the links below:
- Performance Road Bikes
- Road Bikes
- Touring Bikes
- Mountain Bikes
- Kid’s Bikes
The Final Step in How to Choose a Bike Size
With your personal bike preferences and measurements in hand, you should have no trouble finding the right bike size for you and your riding style. The final step in the process is making sure your saddle is at the correct height for your pedal stroke. Do it yourself, or have your local bike shop adjust the saddle height to the right position.