Choosing the right size bike depends on your body proportions and the characteristics of the bike type. The most important measurements are the inside leg length and torso length, which are compared with the manufacturer's size chart. The right wheel size ensures a safe and comfortable ride, while the wrong size can cause pain and reduce riding efficiency.
Why is the right bike size so important?
The right wheel size has a direct impact on driving comfort, efficiency and safety. A bike of the right size allows a natural riding position, where your feet can reach the pedals efficiently and your hands can reach the handlebars comfortably.
A bike that's too big forces you to reach for the handlebars, which puts strain on your back and neck. It is difficult for the feet to reach the ground when stopping, which compromises safety. A wheel that is too small forces the rider into a crouched position, which puts strain on the knees and reduces pedalling power.
Using the wrong size wheel often leads to back pain, knee pain and numbness in the hands. The bike's controllability suffers when the weight is unevenly distributed and the steering is unnatural. In the long term, the wrong size can cause permanent musculoskeletal problems. Check out VMSport's wide range of bicycles and find the right size bike for you.
How do you measure yourself for your bike size?
Inside leg length is the most important measurement when determining the wheel size. Stand with your back against the wall without shoes, place the book between your legs as if you were sitting in a saddle and measure the distance from the floor to the top of the book. This is your inside leg length in centimetres.
To measure your torso, you need your overall length and the reach of your arms. Measure your height normally against the wall. To measure the reach of your arms, spread your hands out to your sides and measure the distance from fingertip to fingertip.
To get accurate measurements, ask another person for help. Measure in the morning with your spine straight after a night's sleep. Use a fixed tape measure and make sure you are standing upright. Write down your measurements as you will need them when choosing a bike.
How is the frame size determined for different types of bikes?
Different types of bikes use different size systems and proportions. The size of road bikes is usually indicated in centimetres (50-62 cm), while mountain bikes often use inch or letter markings (S, M, L, XL).
For road bikes, the inner length of the legs is multiplied by 0.65 to obtain the appropriate frame size. For mountain bikes, the multiplier is 0,57 for a lower frame. Hybrid bikes fall in between with a coefficient of 0,63. Electric bikes follow the same rules, but the placement of the battery can affect the riding position.
The size tables vary between brands, as the frame geometries differ. Trek bikes may be different sizes from Orbea bikes in the same size range. Always check the manufacturer's own size chart and note that the same person may need different sizes for different brands. At VMSport you will find bicycles from different manufacturers and expert advice to support your choice of size.
What is a ”bike fit” and how is it done?
Wheel alignment means fine-tuning to optimise comfort and efficiency after selecting the correct frame size. Even if the frame size is right, adjusting the details makes the bike truly personal.
The saddle height is adjusted so that the foot is almost straight at the lowest position of the pedal. The distance of the saddle from the handlebars affects the position of the upper body - a saddle too far away will force you to reach, too close will restrict your posture. Saddle tilt is usually kept horizontal or slightly nose down.
The height and angle of the handlebar can be adjusted to the comfort of your hands. On road bikes, the low position improves aerodynamics, on mountain bikes the higher position increases controllability. The position of the pedals and gears is optimised according to the natural position of the hands. Professional fitting ensures that all elements work together.
Choosing the right bike requires careful measurement and comparison of size tables. Frame size alone is not enough - the final fit of the bike to your body determines the actual ride comfort. A test ride is always recommended before making a final decision, as the right size on paper may feel different in practice. Professional advice will help you find the right bike to support your cycling for years to come. Visit VMSport to try out different bikes and find the perfect partner for your cycling adventures.
