Sizz from hypersupp
Road Bike Sizing Assistant
Free · Designed for iPad. Not verified for macOS.
Explore 66 road bike models and generations from 17 brands offline. Compare frame stack and reach with your targets and save your shortlist.
Start your road bike search with your measurements and frame geometry.
Sizz helps you record body measurements, estimate geometry targets, and explore frame sizes using a bundled road bike catalog.
YOUR MEASUREMENTS
Record height, inseam, arm length, torso length, and other measurements. Choose your riding posture and flexibility. Your measurements stay on your device, with no account required.
UNDERSTAND THE GEOMETRY
Explore reference values for stack, reach, saddle height, and more. Read the calculation guide to understand the estimates. Some sizing results are marked preliminary when measurements are incomplete.
AN OFFLINE BIKE CATALOG
Browse 66 road bike models and generations from 17 brands, with 429 size geometry records. Explore brands, search for bikes, view photos and size geometry tables, and save your shortlist. Check official sources for each model. Core browsing and calculations work offline; official website links require internet access.
COMPARE TARGETS AND FRAMES
Use your body measurements to explore frame size suggestions and compare actual frame stack and reach with your targets, giving you a reference for bike selection and test rides.
Available in English and Simplified Chinese on iPhone and iPad.
Sizz uses body measurements and simplified models as a starting point for bike selection and test rides. It does not replace professional bike fitting, an actual test ride, or medical advice. Final fit also depends on components, physical condition, and riding feedback. Catalog entries refer to specific editions and regions; verify official specifications before buying.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The road bike catalog now includes 66 models and generations from 17 brands, with 429 size geometry records.
Added Specialized Allez Sprint, Venge and Tarmac SL6/SL7; Trek Émonda; Cannondale CAAD14 and SuperSix EVO Gen 5; Colnago V4, V4Rs and C72; Bianchi Sprint ICR and Oltre Race; and more.
Explore newer Propel, REACTO, Orca Aero, RCR-R PRO and Filante ID2 references, with generations listed separately to help you find the right bike and frame size information.
New bike photos and geometry tables are bundled with the app for offline access.
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
- 15 MB
- Category
- Sports
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 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