About
Geometry Geeks is the go-to resource for anyone serious about bicycle geometry, offering the world's largest open database with over 97,000 geometry entries spanning road, gravel, mountain, cyclocross, TT, triathlon, and endurance bikes from hundreds of global brands. The platform lets users search for any bike by name to instantly retrieve its full geometry data, or perform reverse searches using specific measurements — such as reach, stack, head tube angle, or chainstay length — to find frames that match a target fit profile. The intuitive side-by-side comparison tool allows cyclists to overlay multiple bikes and sizes simultaneously, making it straightforward to evaluate how different frames will ride or fit before purchasing. The database is community-powered and continuously growing. If a bike isn't listed, any user can add it. Manufacturers and distributors can also bulk-upload their complete model ranges, making it a trusted industry reference. Recently added bikes span brands like Fuji, MERIDA, CUBE, and many boutique builders. Beyond bikes, Geometry Geeks hosts the world's largest directory of professional bike fitters, searchable by country and state, helping cyclists connect with local experts for dialling in the perfect fit. Ideal for cyclists shopping for a new bike, coaches advising athletes on frame selection, bike fitters working with clients, and manufacturers wanting wide visibility for their models.
Key Features
- Massive Open Geometry Database: Access over 97,000 bike geometry entries from thousands of brands and models — the largest open database of its kind.
- Side-by-Side Bike Comparison: Compare multiple bikes and sizes simultaneously in an intuitive visual layout to evaluate fit and geometry differences.
- Search by Geometry Numbers: Find bikes matching specific targets like reach, stack, head tube angle, or chainstay length to identify frames that suit your fit.
- Community Contributions: Any user can add missing bikes to keep the open database current; manufacturers can bulk-upload entire model ranges.
- Global Bike Fitter Directory: The world's largest directory of professional bike fitters, searchable by country and state for local expert help.
Use Cases
- A cyclist shortlisting new road bikes uses the side-by-side comparison to evaluate geometry differences between three models before purchasing.
- A bike fitter enters a client's ideal reach and stack measurements to find all frames in the database that match the target fit profile.
- A cycling coach compares enduro mountain bike geometries across multiple brands to help athletes select the best frame for their riding style.
- A bicycle manufacturer bulk-uploads their full current model range to ensure every bike appears accurately in the Geometry Geeks database.
- An enthusiast looks up their existing frame's geometry to understand stack, reach, and head tube angle before making cockpit or component changes.
Pros
- Unmatched Database Size: With 97,000+ geometries and growing daily, it's by far the most comprehensive bike geometry resource available anywhere.
- Free Core Functionality: Searching, comparing, and contributing to the database is free, making it accessible to all cyclists and enthusiasts.
- Reverse Geometry Search: The ability to search by numbers rather than brand/model is a rare and highly practical feature for fit-focused riders.
Cons
- Niche Use Case: Exclusively focused on bicycle geometry, offering little utility for anyone outside the cycling and bike-fitting community.
- Variable Data Quality: As a community-contributed database, some entries may be incomplete, unverified, or contain measurement errors.
Frequently Asked Questions
How many bikes are in the Geometry Geeks database?
The database contains over 97,000 geometry entries from thousands of bike models across hundreds of brands worldwide, with new bikes added daily.
Can I add a bike that isn't listed yet?
Yes — Geometry Geeks is an open, community-powered database. If your bike isn't listed, you can add it directly through the website.
Is Geometry Geeks free to use?
Core features including search, comparison, and database contributions are free. A paid tier is available that removes ads and may include premium features.
What types of bikes are covered?
The database spans road race, endurance road, gravel, cyclocross, mountain (including enduro), TT, triathlon, and many other bicycle categories.
Can I find a professional bike fitter through the platform?
Yes — Geometry Geeks also hosts the world's largest directory of professional bike fitters, searchable by country and state.
