Sizz from hypersupp
Road Bike Sizing Assistant
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Sizz is a road bike sizing assistant that helps riders understand their body measurements and estimate practical frame geometry targets.
Enter key measurements such as height, inseam, arm length, torso length, shoulder width, and riding preference. Sizz then provides a clear visual reference for estimated Stack and Reach, helping you compare bike frames with more confidence.
Key features:
• Record complete body measurements for bike sizing
• Estimate target Stack and Reach values
• Visualize frame geometry with a clean bike sizing diagram
• Switch between English and Simplified Chinese
• Keep your profile saved locally on your device
Sizz is designed as a sizing reference tool for road bike selection. It does not replace a professional bike fit, medical advice, or final sizing guidance from a bike shop or manufacturer.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
In our latest release, we have expanded our range of recommended bike geometry metrics, including saddle height and saddle-to-stem. Additionally, the calculation formulas are now presented with greater transparency to make self-inspection and community discussions much easier.
The developer, 莉 张, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 莉 张
- Size
- 6.2 MB
- Category
- Sports
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sizz