Is a 19 bike frame a large?Ī 19” bike frame is typically rated as a large frame, appropriate for riders between 5’10 and 6’2”. Medium bike frames can fit riders between 5’6” and 5’10”. What size is a medium mountain bike?Ī medium mountain bike typically has a frame size of between 16” to 18”. Take an updated measurement of your height (or have a friend help you) and compare it to our mountain bike size chart to find out which frame size works best for you. The most important measurement to take is rider height. How do you measure yourself for a mountain bike? Check out our mountain bike size chart or the sizing tools on a brand’s website to determine the correct size for you. Older mountain bikes used seat tube length, or the vertical distance from the bottom bracket up to the seat post clamp. Modern mountain bikes use alpha sizing to categorize frames as XS, S, M, L, or XL. Look for a frame size marked between 19” to 20”. Some bikes use seat tube length instead of alpha sizing to measure their size. Riders that measure 6’ tall should ride a size L mountain bike frame. What size mountain bike do I need if I'm 6 feet tall? Check out our mountain bike size chart for an exact recommendation. Riders 5’11” and taller should get an L or XL frame. If you are between 5’6” and 5’10”, choose a size M. Riders under 5’5” fit best on either S or XS mountain bike frames, depending on which of those sizes are available. What size mountain bike should I get for my height? The mountain bike frame size chart above works well for all types of riders regardless of gender or height. For that reason, most brands don’t provide a women’s mountain bike size chart. Many bike manufacturers have moved away from gender-specific designs and, instead, offer their bikes in a variety of sizes to fit any rider. Bike brands have realized that “size S” is much more intuitive for customers than listing a frame as “15 inches”. Traditionally, frame sizes were listed in inches, but modern mountain bike designs with their low standover height and diverse geometries prevent seat tube length from being a representative measurement. How to size a mountain bike has changed and bikes today are categorized according to alpha sizing (think: S, M, L, XL) rather than the length of the seat tube. Why do some mountain bike frames use inches for sizing? Some models utilize the same chainstay lengths across the size range, but not all. Chainstays connect the bottom bracket to the rear axle, and longer chainstays provide more stability at speed, while shorter ones feel more nimble. It’s important to recognize where the extra length (or lack thereof) is coming from to understand how the overall bike will feel out on the trails.Ĭhainstay length, or rear center, is another measurement to look at. Since wheelbase is essentially a measurement of the frame from one end to the other, wheelbase is made up of other metrics like reach, head tube, angle, and chainstay length added together. Shorter wheelbases means the bike is a bit more compact and will be more maneuverable on technical terrain and around tricky obstacles. How far apart the wheels are is a major factor that determines whether a bike feels more stable or more nimble.Ī longer wheelbase is more stable and is easier to control at high speeds, useful for steep descents or fast trails. Wheelbase is the horizontal distance between the front and rear axles on a mountain bike.
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