# How To Measure Mountain Bike Frame? (TOP 5 Tips)

Adult bikes are measured by their frame size. 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).

## How do you measure a mountain bike frame size?

An MTB’s frame size is traditionally calculated by measuring the length of the seat tube, from the centre of the front chainring to the top of the tube (where the seat post inserts).

## How do I determine bike frame size?

Place the end of a tape measure at the exact center point of the gear crank (the metal post that runs through the center of the bike’s chain sprocket). Then run the tape measure up to the top of the tube. Measure to the point where the tube ends. This will give you the length of the seat tube which is the frame size.

## What does 52cm bike mean?

50 – 52 ( Small ) 5’5″ – 5’7″ 160 – 165. 52 – 54 (Small – Medium)

## What does a 27 inch bike mean?

So when someone says they have a 27″ bike, where are they getting this number? This is most likely the wheel size of the bicycle. Older road bikes were commonly equipped with 27″ wheels, while modern road bikes normally have 700C rims and mountain bikes have 26″ wheels – or sometimes 29″ or 650B.

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## Is 26 inch bike for adults?

“ 26” wheel size is perfect for most of adults with a height above 6 feet. Most of the touring bikes and hybrid bikes come in 700C metric wheels, which are also known as 29-inch wheels.

## What does 30cm bike mean?

Every kid is different, but here’s a general size guide across ages: 2-4 years 30cm /12in. 4-6 years 40cm/16in. 6-8 years 50cm/20in. 8-11 years 60cm/24in.

## Is a 52cm bike too small?

It depends on how the bike is measured. If the 52 is a level top tube and actual seat tube length, I would say no, the bike is too small. If the bike is a sloping top tube and the actual seat tube is 52, then maybe. If the 52 is a virtual size, and the actual seat tube is less say 48 or whatever, then no.

## Is a 54cm bike too big?

54 cm usually refers to the frame’s seat tube length, and based on that, I’d say that top tube there is about 56 to 57 cm. Unless your arms are quite long, or you can get a really short stem with about a 20 degree+ rise, I’d say get a smaller frame with a suitable top tube.