You’ve decided to buy a bike. Congratulations, that’s the best decision you will make in your life and health. But what size bike frame do you need and should I just go to Halfords?
Don’t worry, we can help you. We have put together a list of Bike Frame sizes and what would be best for you depending upon your height. These are across Road, Mountain and Hybrid bikes.
For children, we have included an approximate age as the sizing can vary. For all please make sure you try the bike before purchasing (even if this is second-hand). The sizes are for a guide only but nothing can beat sitting on the bike and seeing how it feels for you.
Bicycle Frame Sizes for Men – Mountain Bikes
| Rider Height (cm) | Rider Height (ft/in) | Frame Size (cm) | Frame Size (inches) |
|---|---|---|---|
| 152 – 160 | 5’0″ – 5’3″ | 35 – 38 | 14 – 15 |
| 160 – 168 | 5’3″ – 5’6″ | 38 – 43 | 15 – 17 |
| 168 – 175 | 5’6″ – 5’9″ | 43 – 48 | 17 – 19 |
| 175 – 183 | 5’9″ – 6’0″ | 48 – 53 | 19 – 21 |
| 183 – 191 | 6’0″ – 6’3″ | 53 – 56 | 21 – 22 |
| 191 – 198 | 6’3″ – 6’6″ | 56 – 61 | 22 – 24 |
Bicycle Frame Sizes for Men – Road Bikes
| Rider Height (cm) | Rider Height (ft/in) | Frame Size (cm) | Frame Size (inches) |
|---|---|---|---|
| 152 – 160 | 5’0″ – 5’3″ | 48 – 50 | 19 – 19.5 |
| 160 – 168 | 5’3″ – 5’6″ | 50 – 52 | 19.5 – 20.5 |
| 168 – 175 | 5’6″ – 5’9″ | 52 – 54 | 20.5 – 21.5 |
| 175 – 183 | 5’9″ – 6’0″ | 54 – 56 | 21.5 – 22 |
| 183 – 191 | 6’0″ – 6’3″ | 56 – 58 | 22 – 23 |
| 191 – 198 | 6’3″ – 6’6″ | 58 – 61 | 23 – 24 |
Bicycle Frame Sizes for Men – Hybrid Bikes
| Rider Height (cm) | Rider Height (ft/in) | Frame Size (cm) | Frame Size (inches) |
|---|---|---|---|
| 152 – 160 | 5’0″ – 5’3″ | 42 – 44 | 16 – 17 |
| 160 – 168 | 5’3″ – 5’6″ | 44 – 48 | 17 – 19 |
| 168 – 175 | 5’6″ – 5’9″ | 48 – 51 | 19 – 20 |
| 175 – 183 | 5’9″ – 6’0″ | 51 – 53 | 20 – 21 |
| 183 – 191 | 6’0″ – 6’3″ | 53 – 56 | 21 – 22 |
| 191 – 198 | 6’3″ – 6’6″ | 56 – 61 | 22 – 24 |
Bicycle Frame Sizes for Women – Mountain Bikes
| Rider Height (cm) | Rider Height (ft/in) | Frame Size (cm) | Frame Size (inches) |
|---|---|---|---|
| 147 – 155 | 4’10” – 5’1″ | 33 – 38 | 13 – 15 |
| 155 – 162 | 5’1″ – 5’4″ | 38 – 43 | 15 – 17 |
| 162 – 170 | 5’4″ – 5’7″ | 43 – 46 | 17 – 18 |
| 170 – 175 | 5’7″ – 5’9″ | 46 – 50 | 18 – 19.5 |
| 175 – 183 | 5’9″ – 6’0″ | 50 – 53 | 19.5 – 21 |
Bicycle Frame Sizes for Women – Road Bikes
| Rider Height (cm) | Rider Height (ft/in) | Frame Size (cm) | Frame Size (inches) |
|---|---|---|---|
| 147 – 155 | 4’10” – 5’1″ | 44 – 47 | 17 – 18.5 |
| 155 – 162 | 5’1″ – 5’4″ | 47 – 50 | 18.5 – 19.5 |
| 162 – 170 | 5’4″ – 5’7″ | 50 – 52 | 19.5 – 20.5 |
| 170 – 175 | 5’7″ – 5’9″ | 52 – 54 | 20.5 – 21.5 |
| 175 – 183 | 5’9″ – 6’0″ | 54 – 56 | 21.5 – 22 |
Bicycle Frame Sizes for Women – Hybrid Bikes
| Rider Height (cm) | Rider Height (ft/in) | Frame Size (cm) | Frame Size (inches) |
|---|---|---|---|
| 147 – 155 | 4’10” – 5’1″ | 42 – 44 | 16 – 17 |
| 155 – 162 | 5’1″ – 5’4″ | 44 – 46 | 17 – 18 |
| 162 – 170 | 5’4″ – 5’7″ | 46 – 50 | 18 – 19.5 |
| 170 – 175 | 5’7″ – 5’9″ | 50 – 53 | 19.5 – 21 |
| 175 – 183 | 5’9″ – 6’0″ | 53 – 56 | 21 – 22 |
Bicycle Frame Sizes for Children
| Child Height (cm) | Child Height (ft/in) | Approx. Age | Wheel Size (inches) |
|---|---|---|---|
| 85 – 100 | 2’9″ – 3’3″ | 2 – 4 | 12 |
| 100 – 115 | 3’3″ – 3’9″ | 4 – 6 | 14 |
| 115 – 125 | 3’9″ – 4’1″ | 6 – 8 | 16 |
| 125 – 135 | 4’1″ – 4’5″ | 7 – 10 | 20 |
| 135 – 150 | 4’5″ – 4’11” | 9 – 12 | 24 |
| 150 – 160 | 4’11” – 5’3″ | 11 – 14 | 26 |
Frequently Asked Questions for Choosing the Right Bike Size
1. How do I know what size bike is right for me?
The best way to choose the right bike size is by using your height as a guide. The tables provided give a general recommendation based on rider height and frame size for different types of bikes. However, it is always a good idea to test the bike in person before buying, especially for second-hand purchases.
2. What should I keep in mind when buying a second-hand bike?
When buying a second-hand bike, it’s important to check the bike’s condition (frame, gears, brakes, etc.) and ensure it fits you well. Always test-ride the bike before making a decision. Frame sizes can vary slightly between manufacturers, and the previous usage can affect how comfortable the bike feels.
3. Is bike size the same across all bike types?
No, bike sizes can vary depending on the type of bike. For example, road bikes, mountain bikes, and hybrid bikes all have different sizing standards. Make sure to check the recommended size for the specific type of bike you are interested in.
4. Can I make adjustments if the bike frame is slightly too big or small?
Yes, there are ways to adjust a bike that is slightly too big or small. Adjusting the seat height, handlebar height, or stem length can help make the bike more comfortable. However, if the frame size is significantly bigger than your height alignment then it may be that the bike isn’t quite right for you.
5. What are the common mistakes people make when buying a bike?
A common mistake is buying a bike without testing it. Always try the bike to make sure you feel comfortable, especially if you’re buying second-hand. Another mistake is focusing solely on the frame size—consider other factors such as reach, handlebar height, and seat comfort.
6. How can I check if a bike fits me correctly?
When you sit on the bike, your feet should be able to touch the ground on either side while seated on the saddle. Your knees should have a slight bend at the bottom of the pedal stroke. Make sure that the reach to the handlebars is comfortable—neither too stretched out nor too cramped.
7. What if I am between sizes?
If you fall between two bike sizes, consider the type of riding you’ll be doing. If you prefer a more relaxed, upright ride, choose the smaller size. If you want a more aggressive riding position, the larger size might be better. Ultimately, it depends on how you want to ride the bike. If you are between sizes you should be ok in either but just choose whichever feels ‘right’.
8. Why should I test-ride a bike before buying it?
Test riding a bike is crucial, especially when buying second-hand. It helps you determine if the bike is comfortable, if the frame size aligns with your needs, and if there are any mechanical issues. A good fit is essential for an enjoyable and injury-free cycling experience.
9. What should I do if I feel uncomfortable on my bike?
If you feel uncomfortable, first check your bike’s fit. Adjust the seat height, handlebar position, and other components. If adjustments don’t help, consider if the frame size is incorrect. A professional bike fitting can also be a helpful investment.
10. Is it worth getting a professional bike fitting?
Yes, especially if you plan on cycling frequently or for long distances. A professional bike fitting can ensure that your bike is set up optimally for your body, reducing the risk of discomfort or injury.