1. What is Bike Frame Size?

The bike frame size is the most important measurement when choosing a bicycle. For Trek bikes, frame size is typically measured from the center of the bottom bracket to the top of the seat tube.

2. How Does the Calculator Work?

The calculator uses the standard Trek frame size formula:

Where:

• \( Height \) — Your height in inches
• \( 0.57 \) — The standard multiplier for Trek bikes

Explanation: This formula provides a good starting point for most riders. The calculator makes small adjustments based on bike type.

3. Importance of Proper Frame Size

Details: A properly sized bike improves comfort, efficiency, and control while reducing risk of injury. Trek's sizing formula has been developed through extensive testing.

4. Using the Calculator

Tips: Measure your height accurately without shoes. The calculator provides general guidance - test riding is still recommended for final selection.

5. Frequently Asked Questions (FAQ)

Q1: What if I'm between sizes?
A: If between sizes, choose the smaller frame for more aggressive riding or the larger frame for comfort.

Q2: Does this work for kids bikes?
A: No, this calculator is for adult Trek bikes. Children's bikes use different sizing methods.

Q3: How does inseam affect frame size?
A: While height is primary, inseam can help fine-tune seat height and standover clearance.

Q4: Are Trek frames measured in centimeters?
A: Some Trek models use centimeter sizing, but this calculator provides inches which can be converted (1 inch = 2.54 cm).

Q5: What about electric bikes?
A: E-bikes generally follow the same sizing but may have different standover heights due to battery placement.