Find your frame size. No guesswork. No test ride required.
A bike only feels right when the frame size fits. Enter your measurements into our SmartFit calculator – available on most bike product pages – and get your recommended size in seconds.
Find your frame size in 3 steps
Getting the right frame size only takes a few minutes – no matter what type of bike you ride.
1. Open the size calculator
Click “Find my frame size” below the product name to get started. Don't see the button? Ask our team for a personal recommendation.
2. Enter your measurements & choose your riding position
Enter your height, inseam length, and arm length, then choose your preferred riding position.
3. Get your frame size recommendation
Your result appears in S/M/L or centimeters. Your measurements stay saved, so you can compare different bikes without entering them again.
How to measure for your bike frame size
Our calculator starts with a general estimate based on your selected gender. For the most accurate frame size recommendation, we suggest having someone help take your measurements.
Time needed: 10 minutes
Tools: Tape measure, book, or spirit level
Height
Stand against a wall with a book placed flat on your head. Measure from the floor to the bottom edge of the book.
Inseam length
Stand with your feet shoulder-width apart and hold a book or spirit level firmly between your legs. Measure from the floor to the top edge.
Arm length
Let your arm hang naturally at your side. Measure from the highest point of your shoulder to your wrist.
Choose your riding position
Your riding posture and style influence which frame size feels right – especially if your measurements fall between two sizes.
Quick tip: Not sure which riding position suits you best? Click the question mark in the calculator for a closer look at the different riding positions.
Sporty / agile
More aerodynamic and responsive – usually a slightly smaller frame
Neutral
Balanced – a comfortable middle ground
Comfortable / upright
Relaxed riding position – usually a slightly larger frame
Your frame size recommendation
You’ll see your recommended size in S/M/L or centimeters, and whether you’re closer to the next size up or down. Bike frame size can vary based on the brand, bike type, and geometry.
Your measurements stay saved while you compare different bikes.
Want to start over? Click the reset button in the top right corner.
Quick tip: Check out our FAQ section if you’re between two sizes.
Bike sizing for kids
For kids’ bikes, wheel size should mainly be based on height and inseam length – not age alone. The bicycle size chart below gives you a helpful size guide.
Approx. 2.5 to 4 years old
Height
90–105 cm
Inseam: 40–48 cm
Approx. 3 to 5 years old
Height
95–110 cm
Inseam: 44–50 cm
Approx. 4 to 6 years old
Height
105–120 cm
Inseam: 48–55 cm
Approx. 6 to 9 years old
Height
120–135 cm
Inseam: 55–66 cm
Approx. 8 to 11 years old
Height
135–150 cm
Inseam: 65–75 cm
Approx. 10 to 14 years old
Height
145–165 cm
Inseam: 70–82 cm
No SmartFit available for your bike?
If your bike doesn’t include a frame size calculator, just reach out to our team for free personal sizing advice.
