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Bike Sizing and Fitting
Whats' the Difference and Where Do You Start?The bicycle is a human invention for increased locomotion and has only been around for a spec of time in the evolutionary time frame of homo sapiens. Meaning, we are not born knowing how to ride a bike, and our bodies are not intrinsically adapted to doing so.
Putting a person on a machine and inviting them to perform repetitive motions for a sustained time period is an invitation to injury, and yet somehow, cycling provides an abundance of enjoyment and pleasure for many. But the invitation to injury is still present.
One of the keys to preventing injury and promoting enjoyment is to ensure a safe and functional biomechanical relationship between the bike and the body that is riding it. Bike sizing and fitting are really about understanding and improving this relationship between the two. They are related but not the same, and the terms are sometimes used inaccurately. Both are incredibly important.
What’s the Difference?
Sizing precedes fitting
Sizing is about initial matchmaking and compatibility. Will this bike and body get along together? What are the critical measurements required to find the right size bike?
Fitting occurs after sizing
Fitting is about strengthening the relationship between the asymmetrical and imperfect human body and the bike. It’s also an opportunity to fine-tune by working out the wrinkles and niggles.
Once you understand the difference between sizing and fitting, you can start exploring the tools, systems, and processes that support each stage. Whether you’re a professional bike fitter, a retailer, or a cyclist learning the ropes, the resources below are designed to guide you through the practical aspects of bike fit: from measuring and documenting to choosing the right setup and software.
Continue Your Learning Journey Through Bike Sizing & Fitting
Fitting Systems
This page explores the different philosophies behind fitting, from hands-on observation to tech-based approaches. It emphasizes that the fitter’s process and experience matter more than the brand or system.
Learn About the Fit Kit System
Learn how Fit Kit’s body measuring tools create a consistent starting point for bike sizing and fitting. This page explains what the system is, how it’s used, and who it’s best suited for.
Bike Fit Software
Explore how different types of software can support bike fitters. From documenting measurements to guiding setup, this overview breaks down categories, use cases, and how to choose the right tools for your workflow.
Tools & Products
Not sure where to start when it comes to bike fit gear? This page helps you navigate our lineup of bike fit tools and supplies. Learn what’s available, what it’s for, and where to find tools for sizing, fitting, and position measurement.
