Choosing the right bike size is essential for comfort, safety, and performance—whether you're commuting, mountain biking, or riding for fun. The Halfords Bike Size Guide helps riders of all ages and abilities find the perfect fit for their needs. With decades of experience in the cycling industry, Halfords offers clear, user-friendly guidance on how to select the right frame size based on height, inseam length, and type of bike.
A correctly sized bike allows you to ride longer with less fatigue, reduces the risk of injury, and ensures better control and handling. A bike that's too small can feel cramped and unstable, while one that's too large might be hard to steer and stop safely.
Different types of bikes are sized differently. A mountain bike will typically have a more compact frame for better control on rough terrain, while road bikes have longer top tubes for aerodynamic efficiency. That's why it's important to follow the guide specific to the type of bike you're buying.
| Height | Frame Size (Road Bike) | |
|---|---|---|
| Feet | Centimeters | Frame Size |
| 5'0" | 152cm | 48cm (XX Small) |
| 5'3" | 160cm | 51cm (Small) |
| 5'7" | 170cm | 54cm (Medium) |
| 5'9" | 175cm | 56cm (Large) |
| 5'11" | 180cm | 57cm (X Large) |
| 6'2" | 188cm | 60cm (XX Large) |
| 6'5" | 196cm | 63cm (XXX Large) |
| Feet | Centimeters | Frame Size |
| Height | Frame Size (MTB) | |
|---|---|---|
| Feet | Centimeters | Frame Size |
| 5'0" | 152cm | 15" (X Small) |
| 5'3" | 160cm | 16" (Small) |
| 5'7" | 170cm | 17" (Medium) |
| 5'9" | 175cm | 18" (Medium) |
| 5'11" | 180cm | 19" (Large) |
| 6'2" | 188cm | 20" (Large) |
| 6'5" | 196cm | 21" (X Large) |
| Feet | Centimeters | Frame Size |