How to Choose the Right Bike Size

Find Your Bike Size

You'll find that the correct size of bike naturally improves overall rider comfort. However it will also improve rider performance, as muscle groups will be used in the most effective manner.

Measure Your Inseam

  1. Stand with your back to a wall and your feet about 15cm apart
  2. Push a book between your legs, with its spine up and its short side just touching the wall. Raise it up until it rests snugly against your crotch, thus mimicking your bike seat.
  3. Get another person to measure, in centimeters, from the spine of the book (held horizontally) where it touches the wall, down to the floor.

Understand Frame Size

Some bikes describe their sixes as S, M, L or XL, but others do not.

Mountain bike measurements are usually provided in inches, while most road bike specifications are only in metric units.

'Frame Size' can be taken from the centre of the bottom bracket to the top of the seat tube or from the centre of the bottom bracket to the top of the top tube.

Remember Stand-Over Height and Clearance

Stand-over height is the distance from the ground to the top of the top tube. For a road bike you need at least 2,54 cm clearance, for a mountain bike at least 5 cm clearance.

*This chart is a guide only and does not take into account personal flexibility, injures, range of motion or riding style