Answers to your bikefitting questions

Why bikefitting

Because it is worth the effort . . . for more cool miles

What is bikefitting

Radvermessung is bicycle ergonomics. Man is sitting on a bicycle, five points of contact with this. A fixed contact that divides into two legs, a direct contact that feels its own weight close up and a variable point of contact, which in turn is split between two contacts (both hands). These connections with the sports equipment can be roughly adjusted or just to the nearest milimeter and individually adapted to your own body. This is done professionally during the wheel measurement. Wheel measurement (English: bike fitting) is carried out in various ways and also marketed by various bicycle manufacturers under their name. Terms such as bodyscanning, bike scanners, body geometry fit, precision fit, position and pressure analysis, 3D analysis, or dynamic measurement describe the individual setting of the position on the bike. Including orthopedic aspects and flexibility tests, it deals with malpositions. Supported by experience, the exact attitude and optimization comprehensively and by hand or computer individually, realistic, comprehensible, and vividly put into practice. Various technical measuring systems, software, laser, solder, protractor and video are tools used by „bike-fitter“ who all pursue the same goal: to position the athlete ideally on his bike.

Roadbike position

The road bike is the type of bike with which you are actively traveling the fastest. It’s faster with the help of gravity downhill and off the beaten track with a downhill bike. Setting a road bike is the most proven of all settings around the subject of cycling. The golden middle of comfortably upright on top link, sporty on train on the brake handles or on the lower handlebar must be found. A universal attitude for different speeds should be achieved. With Bike Fitting you can get the best advice and take your sitting position with you.

Fitbike company

just another concept


Ergon fitting box

A box full of surprises. Bikefitting for doing it yourself.

Radbiometrie company

A wise guy in bike fitting. Jens Machacek with his Winsole.

Smartfit company

The bike lab sends its regards. Determine the frame size easily.

BG Fit Specialized

Dr. Pruitt invented it. Not in Switzerland, but in Boulder USA. The concept that broke down the bikefitting shaft to end customers. Not only professionals but customers of all levels can be served by the Specialized dealer. Retül was integrated into the BG Fit concept.

Precision Fit by Trek

One of the biggest bike manufacturers also has its own concept. Madonna!

Oval chainrings for more power

In practice one recognizes the optimal cooperation of the muscle loops during the one-legged step. A loss of chain tension is usually to be expected through a loophole in the drive: at a certain knee angle, one does not know how and where the leg should work in order to keep the pedal moving smoothly. Now imagine these holes in each leg and over thousands of turns in the course of an exit. You quickly recognize the need to catch up. The cooperation of the muscle chains is learnable and does not require much energy which has to be pumped into the system, but rather requires a muscular coordination. Whether oval or round, the decisive factor is the impulse on the pedal.

Analysis via datalogger or nerve

The Watt power measurement has become an always available „must-have“ for cyclists. Professional training is hardly conceivable without reliable performance data, because with the information gained, the training can be brought to a higher, because more effective level. The kick analysis is measured with the latest software and hardware. The entire actual pedal travel is stored with exact data. For ease of understanding, these many measurement points are presented in the form of graphs and charts. Accuracy, uniformity, efficiency and torque are accurately measured to the angular degree. How good is the propulsion of both legs on the pedals and which way each leg describes and which force curve is behind it? The individual (one leg) and total torque is shown. They show what is inside you or where there are still potentials. If you are interested in this separate analysis, please email us!

Torque effectiveness

How much power does the rear wheel deliver from the pedal, how effective is your kick. The information can be read in percent and ideally between 60 and 100%.

Pedal smoothness

Suppleness means putting the crank elegantly in the curve. If the power is smoothly distributed over the turn of the crank or you chop through the corridors like a woodcutter. The figure is in percent, with 10 – 40% to strive for. Theoretically, with 100% pedal smoothness, the force would be constant on the pedal over the course of one revolution of the crank, but this is not possible in practice. There is no help for manpower.

Does bikefitting help with pain

Pain of all kinds is a warning signal from the body. Of course, one has to distinguish onset pain or a painful pulling due to the burden of real pain with a defined cause. If such a movement-restricting phenomenon occurs, it is precisely this root cause that must be eliminated. The wheel measurement can help to rule out orthopedic incorrect loads. Bike Fitting also makes the head fitter, as negative thoughts are eliminated.

Why bikefitting

The decisive advantages for a „True Fit“ wheel measurement speak for itself. Dynamic wheel measurement is the true adaptation of the bike to the body proportions and needs of the driver. It comes to the vote and balance of wheel and machine to the individual body measurements and biomechanics, taking into account all the abnormalities that occur during pedaling. The advantages at a glance:     Comfort     aerodynamics     performance increase     injury prevention     economic effort     

Efficiency of power transmission You experience more wellbeing and fun cycling. Complaints such as falling fingers, pain in the back, buttocks, hips and knees or numb or burning soles and toes can subside or prevent it.

What happens during the bikefit

The driver is active in his role and right in the middle of the movement. The control, improvement and adaptation come from the outside. However, no distances are measured with the tape measure, but rather the effect of individually required changes and improvements by the driver cranked, felt and confirmed.

Benefits through bikefitting

Wheel measurement improves comfort, ergonomics and efficiency. In addition, the aerodynamics are perfected and your movement pattern refined. Your kick becomes supple and round. Overload damage is avoided. The three-dimensional and dynamic wheel adjustment helps you to increase your performance and leads to more wellbeing on the bike. In sum, the maximum can be taken out of your material, because you will move perfectly in the direction of travel. Full speed ahead!

Perfect bike shoes

The fit is crucial, because the bike shoe should fit snugly and not exert pressure points. This means a stiff non-yielding and no pushing sole, where you feel the screws of the cleats, a lacing system that individually loose, how can be made firm and one should drive with this shoe anyhow better than can go.

Which powermeter

The Infocrank is the most accurate powermeter on the market. The data at a glance: – exact torque measurement without distortion of the data – sturdy and stiffer bottom bracket with 30 mm bottom bracket – 150 mm Q-factor – Crank arms in 170 / 172.5 / 175 mm length – bottom bracket fits into all frames (BB30 / PF30, BB86, BSA, …) – Integrated measurement and batteries (button batteries type SR 44) – Interchangeable quickly and without special knowledge – Over 500 hours of use – calibrated and ready for immediate use (no readjustment necessary) – independent temperature calibration – IPX7 waterproof, up to 1m – Ant + data transfer – cold forged 6000 aluminum alloy – 110 mm compact hole circle with 5-arm spider for 50/34 and 52/36 – classic for 53/39 as Infocrank Classic


Roadbike shoe

The most important connection to the bike should be ideally configured. The „putting on“ of the „shoe-pedal-network“ has to work not only when putting on the ground, but exactly where it happens thousands of times: namely kick for kick and on 2 x 360 °. In order for this „Connection“ works optimally and without failures, it is not crucial which manufacturer emblazoned on the shoe, but whether the individual needs and requirements are met. Thus, the following individual aspects of the cycling shoe must be considered: length, width, heel counter, insole, shape and shaft height. Of course, the look must not be missing!

Insoles with bikeshoes

Normal feet or abnormal architecture. Different foot shapes need different supports. In addition to the physiotherapeutic training of the foot muscles can avoid pressure peaks by the foot is generously supported and therefore rests on the entire surface. For the maximum pressure distribution.

Which handlebar

It is important to consider personal proportions: Many handlebars with many different shapes and widths. But shoulder width, hand size and arms of the driver only want the one and right, because suitable handlebars.

Bar tape and grips

A good ergonomics offer good handles or sophisticated handlebar straps. The direct contact between hands, fingers and handlebars is better if the hand is best supported and given enough friction and comfort.


The magic formula is 90 plus. It should be tried to keep the cadence as smooth as possible. Pressure, tensile and shear phases are to merge into each other and that for each leg separately. This works best when the muscles are easy.

Powermeter for training

The training with a Wattkurbel provides for a more refined driving style, because the body feeling does not coincide experience completely with the load feeling. Time-delayed, the pulse responds depending on the power used. The difference between two cadence at the same speed gives the same performance, but it feels 10 turns more, just more stressful. The cardiovascular system can be trained and controlled more precisely using objective measurements.

Find the saddle position

Before the position is determined the own needs and expectations are to be found on the seat contact: Wide, narrow, long, short, soft and hard. The available selection of wheel saddles is great. But the products that are really individually chosen are collected in a small, limited quantity. Making the right choice is a bit easier. If a product is consistent, it is best to stay true to it across several wheels.

The right saddle

The possible choice of bicycle saddles is huge, the matching is already reduced to a few and the right must also arrive in the head as such. Once this has been achieved, the properties of the model should be scrutinized, because there are some differences. The main arguments for the saddle whether road bike, MTB or trekking are shape, width and material or less of it if it should be a hole recess. In the form of the side and top view is judged: flat, curved, long or short. The same applies to the seat: the middle of the saddle and the ischial bone to sit on the same level, then the pressure is distributed equally on pubis and ischial tuberosity, or higher then the body weight is distributed to the pubic bone and the ischial tuberosons are relieved or deeper then helps an overburdened pubic area only one recess. In this case, it can again come to exactly the edge of the recess to more pressure. With the width one must not be irritated by the indication of the manufacturer, because the usable width is usually subject to the absolute. Whether the ischial tuberosity can take up much or little area depends in turn on the convexity of the saddle shape. Women are easier with discharge channel or recess. Pressure peaks are thus avoided, especially in the genital area. The material plays a crucial role when modern cycling shorts are used. Then the contact surface can quickly mutate to the skating place, an unpleasant slipping is so preprogrammed. Thus, the number of possibilities is almost infinite and wants to be well matched. Then the intimate friendship of the two partners can be a beautiful but unobtrusive.

Power watts

Measure performance in numbers, get better and get more out of it. To make the improvement and performance objectively measurable in training is achieved with a Watt crank. The modern cycling training is no longer conceivable without Watt measurement. If the tide crank measures both sides and the results displayed are accurate, the training process can be enormously simplified. Also in the competition can be used again and again on an objective constant. Daily constitution, nervousness or felt heavy legs are finally in the previous season, because in this training parameters are accurately obtained and presented the performance unaffected. This leaves you more courage to react or even attack!

Inside a powermeter

Watt is the unit for performance. This has to be measured somehow. Either strain gauges or other methods that register the pressure on the pedal. A unique feature is the Infocrank. The sensor technology of the measurement is not one-sided or in the crank star, but on both sides in the crank arms. No strain gauges are used for the calculation, but Wheatstone bridges, which can measure a more accurate force. Comparable with a balance, the force is counted from 2 × 360 ° crank revolutions without the laterally occurring forces. The data transfer runs via Ant +. The logs from both cranks are transmitted to the Ant + enabled bike computer, so there are real as real usable numerical values ​​on the display. An accurate training control is guaranteed.

Bikefitting online

A guide to bike fitting can be found in every physics book. Forces, torques, compressive and tensile loads, friction and shear forces are explained in detail. When it comes to cycling, it is important to include the human component so that individual differences and styles are taken into consideration. Instructions a la cookbook and online calculator exist in the sense of a physiotherapeutic work only with a few exceptions. However, any kind of scanning or measurement should be dynamic, that is, take place during the movement.

Bikefitting really for everybody

Cycling is currently enjoying enormous popularity. Racing cyclists everywhere, despite increasing traffic or doping in racing. Many newcomers have access to the very best material through the wide range. Clear that the personal experience and mileage often lags behind the material used. Sporting performance does not necessarily have to come first! A wheel measurement makes exits more joyful!


Ideal position on indoor bike

Big flywheel, direct drive, no gears, a kind of fixie with a lot of weight. Sounds pretty boring but is just because of the massive design always firmly on the ground. Thus, it allows gymnastic exercises of all kinds while pedaling the felt. In the group and with instructions from the instructor, an hour passes by in no time. It does not need a perfect sitting position, especially as you usually pedal with running shoes.


Sitting and running a cyclocross

Cross country, an almost forgotten sport. Nonetheless, the crosswheel connects the driver and the loose ground in a brisk way. With narrow tires and direct power transmission, because without dampers, it drives easily and nimbly through the bushes. An excursion on asphalt is just as easy in there as drivable carrying passages. Because ergonomic sitting and running with the bike on all surfaces can best be combined with the Crosser. When the ergonomics are adjusted in the saddle, as well as at the shoulders and this technique is trained, it runs rounder.


Position on a spinning bike


One of the most used cycle ergometers is obviously the Daum ergo_bike. Minimalist design, quiet magnet resistance and a perfect connection to other hardware characterize the RS 4000 or 8008. The only drawback is the Q-factor, because the is quite large and guarantees wider than the wheel for the road or the terrain. But if the saddle and handlebars are individually pimped, the unique indoor training device is finished.

Stack and reach

The saddle position or the perpendicular on the knee is determined in relation to the bottom bracket. This position is fixed independently of the frame and can not be changed from the point of view of biomechanics. The driver decisively decides on the position of the driver, so it is worked with the information of the level and proximity of the head tube (ie stack and reach). A wheel with a lot of stack and little reach is therefore higher and shorter, so the position of the rider is more upright. With little stack and a lot of reach you sit stretched and bent more forward.


Who needs Radvermessung

For each person who performs at least one of the following sports, a wheel measurement is best suited: triathlon, mountain biking, cycling. In particular, the individual disciplines: Cross Triathlon or X-Terra, Ironman or long distance, 70.3 or middle distance, road cycling, cross country, bike marathon, hillclimb, further: duathlon, time trial, cross country and any kind of 24h race. Whether recreational athletes, ambitious hobby riders or competitive athletes – everyone can sit like a champ on his bike, because the individually best seating position is not only reserved for professional athletes. All those who are physically fit to ride their bicycles should be able to use their full potential. Whether the object of desire has been bought fresh or whether the existing bike has many miles under its belt, it is never too late for a seating position optimization. Despite a few kilometers with a certain attitude, to which the body has inevitably got used, but this does not mean that she is the right one.

The difference between measurement bikefitting

Basically, we did not reinvent the bike. The settings are made according to the physical backgrounds, but no centimeter measurements are measured. Results that come out when measuring the body proportions, serve primarily to determine the required frame height. Furthermore, so the crank length and handlebar width can be set. As a length specification, for example, you get the seat height to which one approximates the real saddle top edge with a tape measure. A connection to the individual body measurements is certainly given, but not yet optimally adjusted. Alone the fact that even the own body weight pushes the upper edge of the saddle under the imaginary and referenced line is remarkable. Our wheel measurement is a dynamic analysis, a „bikefitting“ during the movement. The human being in its entirety is analyzed during the activity. The position of the connection points between the driver and the wheel are determined by driving in a longer process and on the roller. Always with the background of physical and ergonomic principles. However, this requires a fixed device in which your bike is fixed, both a trained eye, as well as experience in the implementation and time. But that means for you that you naturally start to sweat, because you play in this process the main driving role. You’re in the middle of it, instead of just being part of it!


Why aren`t there any more fitting options

We do not do things by halves! Therefore, no parts of the comprehensive and comprehensive wheel measurement are offered. It is only the one and thus complete optimization carried out – with all the details and subtleties that lead to a perfect seating position. Setting the focus on certain areas and thus omitting something would therefore only be a „half-thing“. Overall optimization depends on the individual steps, which in turn build on each other. There are therefore no (price) offers to choose from.

Motion capture as Retül

Subject to a moving stick figure, the simulation on the screen depends primarily on how accurately the reference dots of adhesive were applied to the skin. Only when these match perfectly with the joints and other relevant points and are therefore really accurate as well as remain during the movement, the computer can create a true image on the display. The only question is what to do with it?

How long does the bikefitting session lasts

The „bike fitting“ is only possible through biking the device. Your own calibration and keeping the operating temperature brings you the security and the feeling to come in your usual driving style. Only then can you better perceive differences and examine the recommended settings more closely. The setting, the experience, the check and the necessary repetition – up to the last final change – just takes time. The duration of the wheel measurement you are active, in the middle of the action and quite busy. This invested time compensates for many exits and kilometers where the stopwatch will no longer play any role.

Is it worth the whole process

If you look at the total time spent on the bike, you can easily figure out how big a possible ergonomic compromise is and how much energy will be lost per turn of the crank. The importance of „customizing“ becomes obvious upon such consideration. If, however, the movement is set perfectly, you either slow down faster at the finish or you come back with less loss of power from the exit. For the competitor, this means a saving of the energy used, as well as the optimal use of power of the drive and holding muscles. The hard-earned skills in training can be fully retrieved without slipping on the saddle and without limiting negative thoughts that circle through the head on a long ride.

Bikefitting after you bought a new bike

Equip the purchased new bike according to your wishes and recommendations of your bike dealer and assemble. Only with saddle and stem you reserve the option to change or a possible replacement. Please do not cut the steerer yet! The cables do not have to be pulled in or can only be laid after the fitting.

Through axles on your bike

Does your bike behind a thru axle, the clamping in a standard role is difficult. When wheel measurement, a roller trainer is used that meets all standards. Should the bike fall completely out of character, we will find an adequate solution.


27,5 '' mountainbike

The bike market surprises with a variety of new dimensions. No matter which one agrees and whether one follows the trend, it decides the contact points between driver and wheel on the seating position. The size of the wheels or the ratio of stack to reach let the „Pedalur“ either „on“ or „in“ the bike sitting, the handling and the control change thereby. Let your trusted dealer recommend your ideal bike for your needs. He will give you the best solution for your height and purpose. Customs and axle standard play no role in wheel measurement.

Enduro bike fitting

An Enduro offers a lot of suspension with a flat steering angle and a steeper look. Uphill still reasonable to climb on his own strength altitude, which can then be destroyed downhill full of joy. Whether Clickies, ie click pedals facilitate the train on the crank or guarantee a safe departure with flat pedals is at your own discretion. Depending on where the focus is placed, just that type of pedal is used. A solution for both sides is a flat attachment on the SPD pedal! Bike-fitting.at will help you.

Crossbike, trekking, gravel bike

Cyclocross, Crosser or Gravel Bike or the terms: Adventure, New Road, All Road, Road Plus, X Road indicate a multifunctional bike. No matter which surface, even if it is still sharp and slippery. Riding a bike and leaving predetermined paths allows a lot of freedom. Do your own cycling and when the bike has to be shouldered, you know about the elegant descent.

Should your question not to be answered, please return it via contact form!


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