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THE SOLUTION TO BIKE SIZING - FIT FIRST SIZING

Updated: Jan 25, 2023


In this post we are going to talk about how Performance BikeFit is tackling the problems with sizing. Before we dive in let’s have a quick recap on sizing to understand how we got here.


To understand how confusing sizing a Bike by just the manufacturers sizing chart is Checkout our post on THE DATA OF BIKE SIZING Here we'll reveal our Fit First approach to bike sizing.

The bicycle industry has created a mess of bike sizing (to put it lightly). The current approaches to finding the correct size bike are somewhat limited. Manufacturer sizing charts don’t account for individual variations in body segment lengths or an individual's target riding position. To make matters worse bike sizing labels are inconsistent. We know these sizing problems affect almost all cyclists. After a decade of fitting bikes, we have come across an unfortunately large number of people on what would be considered the wrong size bike. By “wrong size” we mean a bike that cannot accommodate the ideal riding position of the rider or, can only accommodate that position with unreasonable compromises in componentry.

This got me thinking:

  1. How can I solve this problem?

  2. How can we make it easier to choose the right size bike?

What came was a dove into how people actually fit bikes and a bottom to top approach validating a riders position with the matching geometry.

We also know not every bike will fit just right with the components that come out of the box (though it’s great when they do).

So using our Bike Sizing jig allows us to replicate the Frame Geometry of your Target Bike, adjust components on a bike such as stem, handlebar width, height of spacers under the stem, and crank length, that way we can test the difference in your fit between a 54cm Trek Madone with a 90mm stem and 20mm of spacers, versus a 52cm Madone with a 100mm stem and 40mm of spacers?

So, how does it work?: The process begins with Specific Body Measurements.


While taking your body segments we gather a few additional details to provide the best recommendations possible. As mentioned, the proper size bike is one that can accommodate your target position, so we need to understand your riding style (e.g. road, gravel, etc) and your fit goals (e.g. relaxed, aggressive, etc).






Once we’ve established everything we need to know about your body and how you’d like to ride, we use this information to pose you on our database of bikes to understand how they fit. Finally, we’ll recommend the models and sizes that fit you best with initial Seat Height, Stem Length and Handlebar Width as a good starting point.


Once we have the Target Bike Model & Size we will then setup our Bike Sizing Fitting Jig to replicate that bike in terms of Frame Geometry, recommended Handlebar Width, Saddle X & Y measurements.

We will then go through a complete Performance BikeFit Session using our 3D Video Bike Fitting Software to get the complete Bike Fit Data in terms of Bike Size, Stem Length, Handlebar Width & Crank Length which you can pass on to your Bike Retailer so they can provide you with the Correct Bike straight out of the Box.


Once you have taken delivery of your new bike you can bring it back to the BikeFit Studio so we can set the bike up for you and make any final tweaks.


We think our Fit First Sizing approach is going to revolutionize how people choose & Buy their bikes. The problems with sizing in the bike industry may not change, but we’re confident we’ll help riders make sense of it and see through the inconsistencies and confusion to easily choose & buy the right bike.



Many Athletes have used Performance BikeFit to improve their cycling position. Whether you are a veteran or new to the sport, Performance BikeFit can help you improve your position and improve your enjoyment of cycling indoors and Out.




© 2022 Performance BikeFit .

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