Specialized Mountain Bike Size Calculator. Specialized Mens Road Bike Sizing Guide. ETT is a common measurement to look at when sizing a bike and is a good indicator of how long a bike will feel while you're seated.
Be sure about the bicycle type you want to choose: Mountain bike, city bike or road bike. ETT is a common measurement to look at when sizing a bike and is a good indicator of how long a bike will feel while you're seated. Most mountain bike manufacturers use classic Small, Medium, Large sizing.
Kids can also learn to ride on different types of bikes (balance bikes vs. bikes with training wheels), which can impact what pedal bike they are ready to ride.
You can read about the different bike types here.
Mountain Bike Sizing Guide When buying a bike, the fit is the most important factor when it comes to comfort—and the more comfortable you are, the more likely you are to keep riding. Kids plus bikes is a recipe for non-stop play, and there is no greater joy than watching them discover their world by bike. Mountain bike sizing can be affected by suspension and your tire choices.