BIKEFIT 3D · GURU
You move when you pedal. Your assessment should too.
Compare position adjustments while you keep pedalling under load. GURU simulation connects measurement with the position you ride on your own bike.
Two decades of applied cycling science.
We publish the figure because comparing blind is what leads to paying twice. A one-hour adjustment and a study that integrates anthropometry, dynamometry, 3D motion capture and follow-up are not the same price because they are not the same thing. With the number in front of you, you can compare scope instead of just cost.
Investment
from COP 595,000approx. USD 190
One session of 2 to 3 hours, in person at the Usaquén laboratory.
The «from» reflects scope: reviewing an already validated position is not the same work as rebuilding one with a documented asymmetry. Anything that applies to your case is explained before booking, never after.
In-lab BIKEFIT
Dynamic capture links movement, load and position while changes are made on the move. Each adjustment can then be documented and transferred to the rider's real bicycle.
The process, step by step
What you take home
This is the format of the document you receive at the end of the study. Each change comes with the starting value, the final value and the reason, so any workshop can reproduce it and you can check it a year from now.
Validation
The final coordinates are transferred to your bike and checked with an orthogonal capture while you pedal again.
Components
Stem, spacers, cranks and saddle worth changing, and the ones that were tested and ruled out.
Adaptation
How to return to training in the new position, and which discomfort is adaptation and which needs a review.
BIKEFIT IN DETAIL
We observe the cyclist as a system: posture, contact points, cleats and response to each adjustment while pedaling continues. The process moves from dynamic measurement and laser references to a final test on your own bicycle.
Precision BIKEFIT 3D
It can appear as power loss, early fatigue, numbness, instability or the inability to hold an efficient posture. The goal is not to copy an ideal position; it is to find a position compatible with you.
Measuring the body before the bike
A position is fitted to a specific body, and a specific body has lengths, ranges and forces that are not the same on both sides. Measuring that before touching the bike is what separates a study from an adjustment: without those numbers, any asymmetry that shows up in the pedal stroke is read by eye.
Both are measured with protocol and with instruments, not with a tape measure and judgement. Anthropometry follows the ISAK standard, at Level 2 accreditation. Strength and range are measured with a VALD DynaMo Plus.
ISAK Level 2 anthropometry
Dynamometry · VALD DynaMo Plus
Externally anchored tests are prioritised over manually resisted ones: it is the configuration with the best documented reliability, and the only one that lets a measurement taken today be compared with one taken six months from now.
What this changes in practice: a strength difference between legs changes what has to be looked at. If the right leg produces 15 % less on the isometric test, raising the saddle «until both legs reach evenly» fixes the appearance, not the origin. What the measurement gives is a documented starting point: we check that the difference repeats across attempts, contrast it with symptoms and with what pedalling shows, and from there decide whether it calls for a change of position, strength work or a clinical assessment. A difference in isometric strength is not a power split, and on its own it does not prescribe a per-side adjustment.
Contact points
The three places where your body meets the bike are tested while you keep pedalling on the simulator. Pick the one you want to see.
[ 01 · Saddle ]
Shape, width and support are decided with the pelvis loaded and pedalling, not from a catalogue.
[ 02 · Bar and stem ]
Reach, drop and width decide how much weight the hands carry and how the shoulders and neck breathe.
[ 03 · Cranks ]
Crank length changes the circle the knee and hip draw on every pedal stroke.
SADDLE AND PRESSURE POINTS
The saddle carries most of your weight and is where discomfort shows up first. Sit-bone spacing is measured directly during the assessment, using a laser reference, and combined with your pelvic position, mobility and pedal stroke. From there the support is checked under load: whether the pelvis stays level, whether it rocks as the hours add up, and whether the pressure sits on bone or on soft tissue.
The top view illustrates outline and width, not the side curvature or a measured pressure map. Saddle shape guide
Comfort, control and performance start at the contact point.
Where the pressure actually sits
What this is not: ONE does not use an instrumented pressure mat. The assessment combines direct sit-bone measurement, 3D capture of pelvic stability and your reported symptoms. Saying so is part of the method — a pressure map measures something this does not, and we do not claim it.
CONTACT MAP
Illustrative geometriesReference footage from saddle manufacturers. It illustrates concepts; it is not an ONE measurement.
HANDLEBAR, STEM AND COCKPIT
Hands are one of the three contact points, and the one most often left as it came from the shop. Handlebar width, stem length and angle, bar reach and drop, and lever position are compared on the simulator while you keep pedalling, because the front end is what decides whether the torso is supported or hanging.
A stem is not a size correction. It is a coordinate, and it is measured like one.
FRONT END · TOP VIEW
Dimensions in millimetresManufacturer footage that illustrates the idea; ONE does not measure it with a pressure map.
Shoulder breadth measured under the ISAK protocol gives the starting point; from there, discipline decides. A narrower handlebar may help reduce frontal area, depending on your position; a wider one changes leverage and control. Both directions have a cost, and neither is chosen from a size chart.
Stem length and angle set reach and drop to the hands once the saddle position is already resolved. Choose the stem after setting the saddle. It can adjust reach within a range, but cannot change frame geometry or guarantee that an unsuitable frame size will fit.
Two 400 mm bars can ask for different positions: bar reach and drop change where the hoods and the drops sit. That is why the model is documented, not just the width.
Bar rotation and lever position change wrist angle and where the pressure sits on the hand. It is one of the fastest fixes for numbness, and one of the most often overlooked.
On a gravel drop bar, flare is the outward angle of the drops; check width at each hand position. On a flat or riser MTB bar, check width, rise, backsweep and upsweep. These are different shapes and need different measurements.
In time trial and triathlon the front end also includes pad width, pad stack and extension length. Pad and extension positions are compared while you keep pedalling under load, because a support that works for ten minutes is not necessarily one that works for four hours.
What gets tested reaches your bike only if it improves your response, and the report records width, stem and lever position so the front end can be rebuilt exactly.
CRANK LENGTH · 150 TO 180 MM
Crank length sets the circle your foot travels, and with it how far the hip closes at the top and how far the knee extends at the bottom. On the GURU simulator the length is changed between 150 and 180 mm while you keep pedalling, so you compare it in your own position instead of on a chart.
Changing crank length moves the saddle with it. It is measured, not swapped.
PEDALLING CIRCLE
Illustrative scaleReference footage; it illustrates the idea, it is not an ONE measurement.
Top dead centre is where hip and knee reach their greatest flexion. A shorter crank opens that angle, and it is usually the first tool when the hip does not close comfortably, when there is impingement or when an aerodynamic position cannot be held for long.
A crank 5 mm shorter leaves the pedal 5 mm higher at bottom dead centre, so the saddle rises by the same amount to keep knee extension where it was, and setback is checked again. Changing cranks without recalculating the position undoes the reason for changing them.
Crank length is a radius: a 165 mm crank draws a circle 330 mm across and a 175 mm one draws 350 mm. That is a 20 mm difference in diameter, not in distance travelled per revolution. At 90 rpm, each leg completes 16,200 revolutions in a three-hour ride.
Shortening the crank does not hand out watts. Maximum power varies little across a wide range of lengths; what changes is pedal speed, the cadence that feels natural and how much the hip has to close to hold the position (Martin and Spirduso, 2001).
When it comes up
Only what improves your response reaches your bike. If the cranks you have are the right ones, you leave knowing it.
Comparative saddle selection
The saddle changes effective height, setback and how the pelvis is supported and rotates. That is why it should not be chosen from a catalogue alone: the lab keeps a selection of fizik Adaptive saddles available to fit and ride during the study. Measurement guides the width; dynamic comparison determines shape and support in your actual riding position.
The Adaptive range uses 3D-printed padding made by Carbon through Digital Light Synthesis (DLS). Its lattice integrates multiple functional zones, each tuned separately to provide different cushioning and mechanical responses for the riding discipline, body position and bicycle geometry.
If one of the options is suitable, it is fitted and adjusted in the same session with saddle height and setback recalculated. A different saddle changes effective height; keeping the previous coordinates without measuring again can undermine a good choice.
What gets tested
Testing does not commit you to buying. If your current saddle is the right one, you leave knowing it — which is also a result.
Public reviews on Google
Selected excerpts from public reviews. Individual experiences; read the full context on Google.
Frequently asked questions
An assessment of the rider and their position, so the bike can be adjusted to their anatomy, mobility, discipline and goal. At ONE the analysis is dynamic: changes are made and validated while you pedal under load, not with the bike standing still.
It can help when the pain is related to position, cleat placement, saddle height or how load is distributed while pedalling. The assessment compares possible causes under load instead of assuming every painful knee needs the same adjustment. Pain linked to injury or another clinical condition requires the appropriate healthcare professional.
Yes, when the numbness is related to reach, handlebar drop, wrist position, pressure distribution or the way the pelvis is supported. Those variables are tested together while you pedal. Persistent or unexplained numbness should also be assessed by the appropriate healthcare professional.
It changes the geometry while you keep pedalling. In a conventional fit every change means stopping, swapping a component and climbing back on, by which point the sensation you were meant to compare has faded. The motorised unit — the DFU, or Dynamic Fit Unit — moves saddle and handlebar under load, so two positions can be compared back to back rather than from memory.
Depending on the case: saddle height and setback, handlebar reach and height, cleat position, foot support, saddle width and any component that constrains the position. The final coordinates are recorded in stack and reach, which are independent of brand and model and can be reproduced on any bicycle.
Yes. The target ranges change with the discipline — more clearance to manoeuvre on MTB, the balance between aerodynamics and sustainable power on triathlon and time trial — but the principles of contact, stability and force transfer are the same. If you have not bought the bike yet, the right order is the reverse: pre-purchase study first, fit afterwards.
Usually two to three hours, including physical assessment, dynamic exploration and transferring the coordinates to your bike. Bring the bicycle as you actually ride it, with your usual pedals and saddle, and the kit and shoes you normally use. Any relevant history helps too: medical or physiotherapy reports, a previous fit, and the discomfort you want solved — including at what point in the ride it appears.
ONE BIKEFIT 3D is offered from COP 595,000 (approx. USD 190). It includes the physical assessment, ISAK Level 2 anthropometry, VALD DynaMo Plus dynamometry, 3D motion capture under load, configuration testing on GURU, transfer to your own bicycle, the report and follow-up. The final scope is agreed before booking.
Yes, though it is worth returning progressively. A change of position redistributes load and the body needs a few rides to adapt, so an unfamiliar sensation at first does not necessarily mean the adjustment is wrong. A follow-up is included when the case calls for it.
The lab is in Usaquén, Bogotá, at 2,600 m. Cyclists from Europe, Central America and the United States have travelled to be assessed here. The session is on-site because the simulator, dynamometry and anthropometry cannot be done remotely; the resulting coordinates travel with you and apply to any bike you own.
Your position should not force you to compensate. BIKEFIT 3D with GURU technology helps improve the relationship between body, bike, comfort and performance under load.
Choose how to start
Credentials · Scientific direction
As Scientific Director and Head Coach across multiple teams, he integrates real-time GURU biomechanics, dynamometry for strength and range of motion, MOCAP 3D, ISAK Level 2 anthropometry, sports nutrition (ISSN), power, data science and biostatistics to improve measurement precision, support professional decisions and validate the athlete’s response.
Measuring precisely is not promising certainty. It is being able to repeat the measurement and compare.
The sources behind the measurement protocol and the adjustment criteria used during the session.
