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Existing Bike Fit using Retul 3D Motion Capture

For the existing bike fit service on the Bike Fit Studio, you will be observed on your own bicycle while cycling in motion on a Tacx Turbo Trainer with power loading and watt management. By capturing dynamic data using Retül 3D technology, the fitter will find the perfect biomechanical fit for you including biomechanical analysis and cycling-specific flexibility/functional strength assessment. This will help to prevent injury, improve performance, and increase comfort.

What Happens In A Bike Fitting Session?

Step 1: Initial Assessment

Initial Bike Fitting Assessment

Every Bike Fit Studio Retül Bike Fitting starts with an initial assessment. We discuss your cycling history, any previous injury issues, points of discomfort, cycling experience, and your goals in cycling. We then go through a physiological assessment to identify leg length discrepancy issues, flexibility issues, stability issues, core strength, upper body strength, and pronation issues. We use that data to better understand and plan for any accommodations that need to be made in the fit. Bike Fit Studio Bike Fitting is highly accurate, so we look at the contours of the soles of your feet to identify varus or valgus feet so we can assess any need for cleat wedges.

Step 2: Initial Capture

Initial Bike Fitting Capture

Before any changes are made, we get precise measurements of your current position on your bike from both sides, using the Retül motion capture system. These initial captures help us to quantify where you are riding before the bike fit, and explain some of the issues that you may have been experiencing previously. We also examine differences on the left and right sides to better understand your riding style and to assess any rider asymmetry, because every cyclist is built differently, and Retül takes that into account in every aspect of your bike fit.

Step 3: Knee Tracking and Cleat Placement

Bike Fitting Knee Tracking and Cleat Placement

Before making any major changes to the bike configuration, we then assess your knee tracking. Ideally, as a cyclist, your knee will move up and down in the same plane. Any lateral or medial movement can result in loss of power, discomfort, or even injury. Lasers are placed in front of you and markers are positioned on your tibial tuberosity and in-line with the second metatarsal head for each leg. Changes are then made to the cleat position to increase power, decrease foot discomfort, and to adjust knee tracking through the pedal stroke.

Step 4: Rider Position Changes

Bike Fitting Rider Position Changes

The primary part of the fit involves changing your bike configuration to arrive at an orthordox road, Track, TT or triathlon position based on your cycling discipline. This can involve simply the modification of the saddle position, modification of the bar position, or replacing stems, saddles, bars, or cranks (at the customer’s direction). The goal is to take an existing bike, with all of its limitations and equipment, and get as close as possible to an ideal fit.

Step 5: Final Changes and Final Capture

Final Bike Fitting Changes

After your bike fit is validated based upon your feedback, and our own visual assessment – your fitter will take a final set of Retül captures from both sides to validate the fit with unparalleled precision. Micro-adjustments are then made, and your bike fitting is completed. To complete your appointment with Bike Fit Studio, your bike configuration is traced using the Retül Zin Device to give us precise bike configuration coordinates for you to use.

Step 6: Fit Report

Retül Bike Fitting Fit Report

When your fit and Zin Measurement are both completed, you will receive a Bike Fit Studio Retül fit report containing before and after photos, the resulting bike configuration data, left and right body geometry data, and some notes about your fit. You will now have finished your Bike Fit Studio Bike Fit, and will leave with the optimal bike position for you and your bike.

Click here to view a sample fit report

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