Most manufacturers now measure the frame from the centre of the crank axle, to the top of the seat tube. Most road bikes are measured in centimetres (cm), whereas mountain bikes are generally measured using inches (in). Kids’ bikes are measured by wheel size rather than frame size.

What does the frame size mean on a road bike?

• Road bikes are one type of bikes using frame measurements (in centimeters) to indicate size, and the typical road bike size is usually between 50 and 64 cm. This number represents the distance from the center of the crank to the top of the frame at the seat tube.

## How do you determine your frame size?

Body frame size is determined by a person’s wrist circumference in relation to their height. For example, a man whose height is over 5′ 5″ and wrist is 6″ would fall into the small-boned category.

## Do small wrists mean small frame?

For men, a wrist size of 5 1/2 to 6 1/2 inches indicates a small frame, while a measurement over 7 1/2 inches is typically of a larger bone structure. Females 5 feet 7 inches and taller are small boned if the wrist measures less than 6 1/4 inches and large framed if the wrist is more than 6 3/4 inches in circumference.

## How much should a 5 7 female weigh?

If you are a 5-foot-7-inch woman, your normal weight is 123 to 136 pounds if you have a small frame, 133 to 147 pounds if you have a medium frame and 143 to 163 pounds if you have a large frame.

You might be interested:  How To Measure A Bmx Bike? (Perfect answer)

## How do I measure my elbow frame?

The elbow breadth is measured by using a sliding caliper. The person’s right arm is extended forward perpendicular to the body. The arm and elbow form a 90ยบ angle, with the fingers pointing up and the dorsal part of the wrist toward the dietician. The largest breadth across the elbow joint is used for the measurement.

## What size is a 21 inch bike frame?

A 21 inch bike frame is an XXL size suitable for people over 6 foot 2 inches tall.