Bicycle frame Size - A bike that fits you - SoCalBicycles.com Riverside, CA

Bicycle Sizes and Correct Seat Height

What Bicycle size do you need?

Just like shoes, bicycles come in a variety of sizes and styles. One popular and high-end model of a bike might have several different frame sizes meant to fit different sized riders. While averaged sized people can ride most model sizes and while the seat height can be raised or lowered several inches in either direction, you will want to pay some attention to the frame size. If a taller rider uses a frame size too short, they will experience an uncomfortable ride and subsequently pedal the bike in an inefficient manner. On the other hand, if a shorter rider uses a frame size too tall, they will find it difficult to get on the bicycle and will also experience further problems as they won't be able to reach their feet to the ground without falling to one side. The proper sized bike frame and seat setting will allow the riders' legs to be almost fully extended when the pedals are in their lowest position. When this is achieved the rider will also discover the most efficient use of their pedaling efforts and further protect their knees and leg joints from undue strain.

Checking the frame size, one needs to measure the vertical distance of the bicycle seat post tube from the top to the bottom. See the diagram and photo below. Do not include the seat, seat post or the main frame in the measurement—just the vertical tube itself.

Most bicycle frames measure 16, 18 and 20 inches tall. "Generally," a 16 inch frame is most comfortable for riders between 4'9"' and 5'6". An 18 inch frame is best suited for riders from 5'5" to 5'9". Over 6 feet a rider should have a frame size of 20 to 23 inches. However these numbers are not absolute as everyone has a different build and or length of their legs. Each of us have our own special and unique body proportions that may alter what works or "feels" best to you. Do not be confused by wheel sizes (24, 26 and 27 inch etc.). Wheel sizes or diameter are independent of the frame size. As a result, you can find a shorter framed bicycle with larger wheels. Generally, smaller sized bikes with 24 inch wheels do however have shorter frame sizes, to accommodate younger (pre-teen) and or very shorter (under 5' ) riders.

Not to worry, all you really need to do is actually get on a bicycle and take a test ride. It is without a doubt the best and quickest way of finding and purchasing a bike with a frame size that fits you properly and avoid all the confusion of measuring each and every bike you like. Fortunately, bicycles have many adjustments available to the rider. Simply moving the seat height up or down can correct many riding positions. Further adjustments of the handle bars can also be of great improvements in riding comfort. Unlike a bicycle purchased from a department or discount store, SoCalBicycles offers you a free test ride to ensure your next bike is the correct frame size!

Proper Bicycle Seat Height / Adjustment

Perhaps the biggest problem with the bicycle riders of today is the improper seat height or adjustment. Most riders set their seat far too low. When your bicycle seat is too low, you do not get the full extension of your leg and therefore miss the benefit of the leg-power in your down-stroke movement. In addition a low seat setting can place excessive pressure on your knees making the rider tire-out quicker. Set the seat too high and while pedaling your hips will rock from side-to-side. When the seat is at the correct height, the rider gains power from less spent effort.

A common mistake for people is to think they should be able to sit on their bike seat and still plant their feet firmly on the ground—not true. Riders should come off their seat and straddle the bar or frame when stopping the bicycle. If you can sit on the seat and touch your feet to the ground other than using your tippy-toes, your seat is set too low!

To check your seat height, sit on your bicycle with your feet on the pedals, or ride it and take notice. Performing this test while stopped you will need to have a friend hold your bike up-right. When your pedal is at the bottom of its stroke or at the 6 o'clock position, your leg should be extended until it is almost completely straight—there should be only a very slight bend of the knee. If your knee is bent too much, you'll need to raise your seat height. Following your corrected seat adjustment, the new "feel" for the rider will at first be very different. But give it some time and maybe a few miles and you will soon notice a great improvement in riding comfort, power and less fatigue. This adjustment will maximize your power and minimize your riding fatigue.

SoCalBicycles.com

Riverside, CA. - phone: (951) 300-8035

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