Readers ask: How To Measure Old Road Bike Size?

How do you measure a vintage road bike?

Size of a Vintage Bicycle The top tube length is measured along the top tube starting at the center of the seat tube and ending at the center of the head tube. The head tube length is measured along the head tube from bottom to the top of the head tube.

How do you measure an old bike frame?

Measuring Frame Size

  1. The old standard system was to measure from the center of the bottom bracket to the very top of the seat tube.
  2. Some manufacturers have decided that this is too easy, so now many bikes are measured instead to the intersection of the centerline of the top tube with the centerline of the seat tube.

How do I know my road bike size?

A key measure of road bike size is your saddle height. You can work this out roughly by using the LeMond formula: measure your inside leg length and multiply this by 0.885. You can also do it empirically by setting your saddle so that you can place the centre of your foot on the pedal with your leg straight.

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How do I know if my bike frame is too small?

You’re likely to notice if a bike frame is too small after you get back from your ride. A smaller bike forces you into a forward position. You may find yourself leaning forward and standing more frequently, which places more weight on your arms. They’ll feel it.

Is it better to have a larger or smaller bike frame?

If your arm span is longer than your height, go for a bigger frame. If it’s shorter, get the smaller one. On a bigger bike, the reach to the handlebars will be longer. If you have proportionally longer arms, you are likely to feel more comfortable on a bigger frame.

How do I know if my bike frame is too big?

If you struggle to make turns or need to sit up straight to reach the handlebars, the frame is likely too large. You may also notice that you cannot quickly turn or pick up speed easily due to the way that you sit in a larger frame. Pain or discomfort after riding also indicates that the frame is too big for your size.

What is the top tube length on a bike?

The effective top tube length is the horizontal distance from the top tube/head tube junction to the seat tube. This measurement has become significant as more and more bikes are designed with sloping top tubes.

How important is bike sizing?

Bike sizing is not the most exciting topic to learn about, but it is one of the most crucial. Having the right bike size is not just a matter of comfort — it can prevent injury both short and long term, and allows you to have a much better riding experience as a result.

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Do pro cyclists ride small frames?

In more modern times, pros often use a smaller frame that a similarly sized recreational rider because they want to ride a big drop to the handlebars. As head tubes continue to grow for a given frame size, pros are forced onto smaller frames to maintain their positions.

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