A size chart is a useful starting point.
Learn which measurements matter, what to check between sizes and how to find a bike that feels right.
A size chart is a useful starting point. Learn which measurements matter, what to check between sizes and how to find a bike that feels right.
The right bike size gives you room to pedal comfortably and keeps the controls within easy reach. Getting it right matters whether you’re buying your first bike, returning to riding or changing from one type of bike to another.
Start with the size guide for the exact model you’re considering. Then look at your proportions, preferred riding position and how the bike feels beneath you. A familiar size label alone won’t tell you the whole story.
Measure your height and inside leg
Measure your height without shoes, standing upright against a wall. For your inside leg, stand with your feet slightly apart and hold a book firmly between your legs, with its spine level. Measure from the floor to the top edge of the book. Having someone help makes both measurements easier.
Record the results in centimetres and use them with the manufacturer’s sizing information. Your inside leg helps assess saddle-height range and clearance over the frame. Your height provides a broader starting point.
Use the chart for that particular bike
Bike sizing varies between brands and models. A medium in one range may fit differently from a medium in another, and a numbered road-bike size doesn’t translate directly to a mountain-bike size.
Check the model year as well as the name. A redesigned frame can have different dimensions even when the size label stays the same. If you’re replacing a bike you enjoy, bring its model and size details along so there’s a useful reference for the conversation.
Check how you reach the controls
Two people of the same height can have different leg, torso and arm lengths. One may feel comfortable on a particular frame while the other feels stretched towards the handlebars.
With the saddle adjusted appropriately, check that you can reach and operate the brakes without struggling. Your shoulders should feel relaxed, and the riding position should suit the time you intend to spend on the bike. On a road or gravel bike, check the hand positions you expect to use, including the brake hoods and drops.
Describe any discomfort you already experience on your current bike. That information is often more useful than asking for the same size again.
Take extra care when you fall between sizes
Overlapping height ranges are common. They don’t mean you should automatically choose the smaller bike for speed or the larger bike for comfort.
Compare the actual frame dimensions and available adjustments. A different model may provide a better starting position than either size of the first bike you considered. Saddle and handlebar adjustments can refine a suitable fit, but shouldn’t be expected to rescue a fundamentally unsuitable frame.
If you can try both sizes, notice how easily you start, stop, turn and reach the brakes. Ask about a suitable test ride before visiting, especially if you have a particular model in mind.
Choose a children’s bike for the rider they are now
Age ranges and wheel sizes help narrow the search, but children of the same age can need very different bikes. Check their height and inside leg, along with their ability to reach the handlebars and operate the brakes.
Buying extra growing room can leave a child struggling to control the bike. Prioritise a manageable fit now, with appropriate adjustment as they grow.
Get help before choosing your size
Before you order, have your measurements, riding plans and shortlisted models ready. If you’re unsure, speak with Cycleworld in Concord West about sizing and bike fitting. It’s much easier to choose a suitable frame at the start than to work around the wrong one later.
The right bike size gives you room to pedal comfortably and keeps the controls within easy reach. Getting it right matters whether you’re buying your first bike, returning to riding or changing from one type of bike to another.
Start with the size guide for the exact model you’re considering. Then look at your proportions, preferred riding position and how the bike feels beneath you. A familiar size label alone won’t tell you the whole story.
Measure your height and inside leg
Measure your height without shoes, standing upright against a wall. For your inside leg, stand with your feet slightly apart and hold a book firmly between your legs, with its spine level. Measure from the floor to the top edge of the book. Having someone help makes both measurements easier.
Record the results in centimetres and use them with the manufacturer’s sizing information. Your inside leg helps assess saddle-height range and clearance over the frame. Your height provides a broader starting point.
Use the chart for that particular bike
Bike sizing varies between brands and models. A medium in one range may fit differently from a medium in another, and a numbered road-bike size doesn’t translate directly to a mountain-bike size.
Check the model year as well as the name. A redesigned frame can have different dimensions even when the size label stays the same. If you’re replacing a bike you enjoy, bring its model and size details along so there’s a useful reference for the conversation.
Check how you reach the controls
Two people of the same height can have different leg, torso and arm lengths. One may feel comfortable on a particular frame while the other feels stretched towards the handlebars.
With the saddle adjusted appropriately, check that you can reach and operate the brakes without struggling. Your shoulders should feel relaxed, and the riding position should suit the time you intend to spend on the bike. On a road or gravel bike, check the hand positions you expect to use, including the brake hoods and drops.
Describe any discomfort you already experience on your current bike. That information is often more useful than asking for the same size again.
Take extra care when you fall between sizes
Overlapping height ranges are common. They don’t mean you should automatically choose the smaller bike for speed or the larger bike for comfort.
Compare the actual frame dimensions and available adjustments. A different model may provide a better starting position than either size of the first bike you considered. Saddle and handlebar adjustments can refine a suitable fit, but shouldn’t be expected to rescue a fundamentally unsuitable frame.
If you can try both sizes, notice how easily you start, stop, turn and reach the brakes. Ask about a suitable test ride before visiting, especially if you have a particular model in mind.
Choose a children’s bike for the rider they are now
Age ranges and wheel sizes help narrow the search, but children of the same age can need very different bikes. Check their height and inside leg, along with their ability to reach the handlebars and operate the brakes.
Buying extra growing room can leave a child struggling to control the bike. Prioritise a manageable fit now, with appropriate adjustment as they grow.
Get help before choosing your size
Before you order, have your measurements, riding plans and shortlisted models ready. If you’re unsure, speak with Cycleworld in Concord West about sizing and bike fitting. It’s much easier to choose a suitable frame at the start than to work around the wrong one later.
Height, proportions and saddle adjustment
Model differences and cockpit position
