BIKEFINDER 3D · GURU TECHNOLOGY · BOGOTÁ

BIKEFINDER 3D: pre-purchase bike study in Bogotá

Aero, endurance or climbing? Pedal your next bike before you buy it.

Compare the geometry of your shortlisted bikes while pedalling on GURU. Your body and goals guide the choice of frame, size and complete build.

Session 1 · Before you buy
Body assessment, 3D pedalling analysis and GURU simulation to define your complete build.
Session 2 · Your bike, fitted
Included BIKEFIT: transfer and validate your position on the bicycle you purchased.

Validate my next bike Explore the process

Direct guidance via WhatsApp · Usaquén, Bogotá

The study price versus the cost of getting it wrong.

It is the smallest investment in the whole purchase, and the only one made before the mistake becomes irreversible. The wrong size is not fixed with a different stem: it limits your position for the entire life of that bike.

Cyclist standing next to her road bike on a street in Bogotá

Investment

from COP 695,000approx. USD 230

Two sessions: 1 to 2 hours before buying, then the BIKEFIT on your new bicycle.

Everything in the position study: ISAK Level 2 anthropometry, VALD DynaMo Plus dynamometry and 3D motion capture.
Session 1: body and functional assessment, direct sit-bone measurement with laser reference, 3D pedalling analysis and target position.
Comparison of specific models, sizes and geometries on the simulator, using the GURU Virtual Warehouse.
Stack, reach and adjustment margin read for every candidate.
Saddle shape and width, crank length, stem, handlebar or integrated cockpit and spacers simulated and decided; plus extensions and arm pads when applicable.
Report listing the compatible bikes and the discarded ones, with the reason for each.

Two sessions included. Session 2 is the BIKEFIT on the bicycle you buy: return with it and the position is transferred and validated while you pedal, at no extra charge. If you cannot return, the report gives any workshop the coordinates required to reproduce it.

Validate my next bike

Juan Manuel Cerón supervises a cyclist during a position assessment on the GURU system

Technology before the catalogue

Your body and riding style decide the category.

The robotic GURU system reproduces the digital twins on your shortlist and compares them under the same conditions. The local simulator archive contains 264 brands and 68,000 configurations, reviewed on 4 September 2026, including Colombian and direct-to-consumer brands and custom frames programmed here. If your candidate is missing, we prepare it before your session.

Format: On-site + prior online review
Duration: Session 1: one to two hours · Session 2: two hours
Deliverable: Model, size and complete build report

Rider + geometry + purpose

Technology turns purchase uncertainty into a decision.

The robotic GURU system changes coordinates and reproduces bicycle geometries while you pedal. BIKEFINDER combines that response with your assessment to decide the category, model, size and complete build.

Measure the rider

Functional range, strength, discipline and intended use.

Programme the candidates

Stack, reach, cockpit and possible configuration range.

Simulate the complete build

Position, components and adjustment range while you keep pedalling.

Validate my next bike

COMPATIBILITY MAP

Body, geometry and target position in one view.

Illustrative sequence

Body

Functional range

Geometry

Stack + reach

Outcome

Probable setup

BIKEFINDER 3D · GURU

Leave with the complete bicycle defined to the millimetre.

The report identifies which candidates reproduce your position, which ones to rule out and the complete build to order. For aero and triathlon positions, it also documents the front-end configuration.

One price covers both stages: the study before you pay and the BIKEFIT on the bicycle once you own it.

The bicycle you will order

Rule out sizes with too little adjustment range.

Compare real stack, reach and geometry.

Define the complete build and its adjustment range.

Protect the budget before paying.

The position you will ride

The BIKEFIT on the bicycle you bought, included.

The study position transferred and validated while pedalling.

Cleats and contact points adjusted on the real bicycle.

If you cannot return, coordinates the shop can reproduce.

Contact points

Saddle, front end and cranks, chosen before you pay.

All three are decided before you pay for the bike, not after it arrives. 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.

A lattice that yields where it should

Variable-density padding

Additive manufacturing

Support that holds over the hours

[ 02 · Bar and stem ]

Reach, drop and width decide how much weight the hands carry and how the shoulders and neck breathe.

Where the hands load the bar

[ 03 · Cranks ]

Crank length changes the circle the knee and hip draw on every pedal stroke.

The pedal circle, out on the road

SADDLE AND PRESSURE POINTS

The right fit goes further.

We measure sit-bone spacing directly during the assessment, using a laser reference. We combine that measurement with your pelvic position, mobility and pedalling, then compare saddles and validate support under load, so the saddle is decided before the bike is paid for and not after the first long ride.

Width: support for your anatomy: Sit-bone spacing helps guide support width. More width is not automatically better: we also check thigh clearance and pelvic position.
Curvature: freedom or a defined seat: A flatter profile allows more changes of position; a waved profile offers a more defined support area. We compare both according to how you sit and move, rather than assigning one by riding discipline alone.

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

The sit bones are what should carry the load. Their spacing is measured, not estimated from height or from the size of the frame.
Everything forward of them is soft tissue. Numbness, burning or pain that appears after an hour is usually load that moved off the bone and onto tissue that cannot carry it.
Pelvic rotation moves the support point. A saddle that works upright can load somewhere else entirely once the torso drops, which is why it is checked in the position actually ridden.
It is assessed under load and over time on the simulator: pelvic stability, rocking and how the support behaves as fatigue builds, not in a ten-second still.

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 geometries

01Shape

02Width

03Support

[ Pressure map ]Pelvic rotation moves the support point

Reference footage from saddle manufacturers. It illustrates concepts; it is not an ONE measurement.

HANDLEBAR, STEM AND COCKPIT

The cockpit is defined before the bike is ordered.

A bike is sold with the cockpit its size chart assumes. If that width or that stem does not suit you, the part is replaced within the first month — and on an integrated one-piece cockpit that replacement can approach or exceed 30 % of the price of some frame kits. It is defined in the session, before the order.

Deciding the cockpit before ordering is cheaper than discovering it afterwards.

FRONT END · TOP VIEW

Dimensions in millimetres

Handlebar width: 400 mm
Stem length: 100 mm
Flare: 0°

[ Hand contact ]Grip pressure concentrates on the hoods and drops

Manufacturer footage that illustrates the idea; ONE does not measure it with a pressure map.

Width: measured, not inherited

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

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.

Reach and drop of the bar itself

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.

Hoods, angle and hand support

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.

Flare and backsweep

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.

Aero positions: pads and extensions

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.

The report states width, stem length and angle, bar model and lever position, so the bike can be ordered or built with the front end already decided.

CRANK LENGTH · 150 TO 180 MM

Crank length is decided before you pay for the bike.

A new bike arrives with the length the manufacturer assigned to that size, and it is rarely questioned. In the session it is defined between 150 and 180 mm, so you either order the bike built that way or change it knowingly, before it becomes one more part bought twice.

A crankset is cheaper to specify than to replace after the purchase.

PEDALLING CIRCLE

Illustrative scale

Crank: 170 mm
Foot travel diameter: 340 mm
Saddle height vs. 170 mm: 0 mm

[ On the road ]Every pedal stroke draws the same circle

Reference footage; it illustrates the idea, it is not an ONE measurement.

At the top: how far the hip closes

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.

At the bottom: the saddle moves with it

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.

Every millimetre counts twice

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.

What it does not do

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

Hip, groin or lower-back discomfort that appears in the seated climb rather than on the flat.
Aerodynamic or triathlon positions where the torso has to drop without shutting the hip.
Riders with a long femur relative to their height, or with limited hip flexion.
Short riders on small sizes where the stock crank was chosen by frame size, not by leg.
Mountain bike and gravel, where crank length also changes ground clearance.

The report states the crank length to order, so you do not discover it after the bike is paid for.

The problem with size charts

The same size can hide three different bicycles.

An aero, endurance and climbing bike can share the same nominal size.
Reach, stack, cockpit, setback and geometry change the real adjustment range.
We do not look for a generic size. We look for compatibility.

Size does not tell the whole story. Geometry determines much more.

What we assess

Body measurements and functional range.
Discipline, goals and intended use.
Probable bicycle geometry.
Stack, reach and adjustment range.
Cockpit, saddle and contact points.
Compatibility between rider, bicycle and purpose.

What you receive

Position coordinates in stack and reach, independent of brand and model.
Compatible sizes and geometries among the bikes on your shortlist.
Discarded models and the specific reason each one was ruled out.
Complete purchase specification: saddle shape and width, crank length, stem, handlebar or integrated cockpit, setback and spacers; plus extensions and arm pads when applicable.
A document with the coordinates and measurements in millimetres for the shop or seller.

Who it is for

Riders buying a new or used bicycle.
Cyclists deciding between two sizes or models.
Athletes who want to validate a bicycle before paying.
Riders with previous sizing or geometry problems.

Measuring the body before the bike

Anthropometry and dynamometry, integrated.

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.

Skinfold measurement with a caliper on a cyclist's back, following ISAK protocol

ISAK Level 2 anthropometry

Segment lengths per side: femur, tibia and foot. This is what explains why two riders with the same inseam need different saddle heights.
Bone breadths and girths: biacromial and bi-iliocristal widths drive handlebar and saddle choice.
Skinfolds to protocol: recorded as a sum, not converted into a body-fat percentage that would carry the equation's error.
Measured repeatability: the ISAK standard requires a technical error of measurement within limits, which is what makes two sessions months apart comparable.

Dynamometry · VALD DynaMo Plus

Isometric strength and range in one instrument: dynamometer and inclinometer combined, so force and mobility are recorded in the same test rather than across two sessions.
Over 400 test protocols with five interchangeable attachments, covering hip, knee, ankle, trunk and shoulder.
Asymmetry in numbers, not impressions: each side is measured separately and the difference calculated. A 12 % imbalance between legs is actionable; «your right looks stronger» is not.
Comparable over time: the same battery repeated after a block of work tells you whether the imbalance was corrected or merely compensated.

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.

Frequently asked questions

Questions worth resolving before you pay.

What is a pre-purchase bike study?

An assessment done before you pay, to establish which size, geometry and configuration are most compatible with your body, discipline and goal — whether the bike is new or second-hand.

Does it just tell me a frame size?

No, and a letter on its own would not be much use: two bikes labelled the same size can feel entirely different. The study compares stack, reach, geometry and remaining adjustment range across the specific models you are considering, and flags the ones that would box you in.

What do I actually walk away with?

Your position coordinates in stack and reach, independent of any brand; the compatible sizes and geometries on your shortlist; the models ruled out and the concrete reason why; and the complete purchase specification for saddle shape and width, crank length, stem, handlebar or integrated cockpit, setback and spacers. For aero and triathlon positions, extensions and arm pads are included too. You receive those measurements in millimetres for the shop or seller.

How long does the BIKEFINDER take?

Two sessions. The first one happens before you buy and takes one to two hours at the laboratory: you are assessed, your target position is defined and the candidate models are pedalled on the simulator. The second one is the BIKEFIT, once you own the bicycle: the position is transferred and validated under load. It is included in the price, so you do not pay twice for the same work.

How much does a BIKEFINDER cost?

ONE BIKEFINDER 3D is offered from COP 695,000 (approx. USD 230). It includes the physical assessment, your target position in stack and reach, the candidate models compared on the GURU simulator and the document with the sizes and the configuration to order. It also includes the second session, the BIKEFIT on the bicycle you bought. The final scope is agreed before booking. It does not include the bicycle: the study decides the geometry and you leave with the measurements to buy it wherever you want.

Do I need to own the bike first?

No — the whole point is to assess before buying. Send the brands, models, sizes and geometries you are weighing up beforehand so the comparison can be prepared.

Does it help with a second-hand purchase?

Yes, and the stakes are higher there: on the used market there are no exchanges or returns, and the supply is whatever appears rather than what suits you. With your coordinates you can judge a listing in minutes instead of deciding from a photo and the size in the ad.

What if the compatible bike is beyond my budget?

That is a common outcome and useful information in itself. Knowing your coordinates lets you look down the range deliberately: which lower-tier models reproduce the same position, how much adjustment range they keep, and which components would need changing. The alternative — buying what you can afford and hoping it fits — is what usually ends up costing more.

Does this replace a bike fit after buying?

They are two stages of the same purchase process. The pre-purchase study decides which bicycle and build fit you; the BIKEFIT afterwards transfers and validates that position on the real bicycle while you pedal. That follow-up BIKEFIT is included in the BIKEFINDER price, so you do not pay twice for the same work.

Bring your shortlist. Leave with a decision.

BIKEFINDER 3D simulates and documents the geometry and complete build in millimetres before purchase, so the order does not depend on trial and error.

Choose how to start

Validate my next bike Request Diagnosis One

Juan Diego Guerrero, a Team Sistecrédito rider, pedalling on the GURU simulator while Edwin Castiblanco follows his BIKEFINDER study on a tablet

BIKEFINDER with a pro rider

Juan Diego Guerrero chose his 2026 Bianchi by riding it before the season.

Before ordering the bike he starts the season on, the Team Sistecrédito rider came to the GURU: he compared the climbing and aero versions and settled frame size, crank length and handlebar around his own position. It is the same study any cyclist does when they come to decide a purchase.

Compared: 2026 Bianchi, climbing and aero
Decided: Frame size, cranks and handlebar

Credentials · Scientific direction

Who decides which bike suits you, and with what training.

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.

Athletes supported by ONE have earned regional, national and Pan American medals and competed at World Championships.

More than 3,000 bike fit and biomechanical assessment processes carried out over the years, with different instruments and stages of the laboratory: not all of them used GURU, 3D capture or the current equipment.

Force is measured with the dynamometer anchored to a fixed point, because a hand-held test stops being comparable between sessions.

Twenty years coaching cyclists, from five-hour-a-week amateurs to riders at world championships.

The method behind the pre-purchase assessment · 4 primary sourcesView the full citationsSilberman et al. 2005 · Fonda et al. 2014 · Bini et al. 2011 · Collings et al. 2025

The sources behind the body measurements and the geometry compatibility criteria.

Silberman, M. R., Webner, D., Collina, S. and Shiple, B. J. (2005). Road bicycle fit. Clinical Journal of Sport Medicine.
Fonda, B., Sarabon, N. and Li, F. X. (2014). Validity and reliability of different kinematics methods used for bike fitting. Journal of Sports Sciences.
Bini, R., Hume, P. A. and Croft, J. L. (2011). Effects of bicycle saddle height on knee injury risk and cycling performance. Sports Medicine.
Collings, T. J. et al. (2025). Reliability of VALD DynaMo dynamometer to assess upper and lower body isometric strength in healthy adults. Physical Therapy in Sport.