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KGS Bikes Fitting Process – How and Why

December 7th, 2009

My Health

Many people ask us about our fitting protocols and how we have come to be recognized as one of the best in the world. I wrote this article explaining what we do so one can have a better idea of the depth we go to in order to find an exact position for a rider.

I have studied bicycle fitting for over 25 years and have the expertise and technology to fit bicycles to clients more accurately than was previously possible. I also specialize in fitting people over the age of 40 as well as extremely short and extremely tall individuals. In these years of research, I have studied fitting systems and have discovered the pitfalls of other systems as they relate to the human bicycle rider. While other systems rely on equations and formulas, we are aware of them but place the rider first and create a unique environment for them to develop a unique fitting solution.

At KGS Bikes we have proprietary techniques to help the client become aware of the subtle differences in bike fit. By nature, humans are very adaptive and as such will ride any bike within an acceptable range of sizes. Some people have larger acceptable ranges and some have very small effective ranges.

Our technique is the reverse of traditional fitting systems. We create an environment whereby the rider can perceive small differences in saddle and handlebar placement. This information is used to tell us where to position the saddle and handlebars, making the bike adapt to the client. Because neither I nor the client is restricted by traditional fitting standards and our system is both double-blind and repeatable, which is the basic definition of good science.

KGS protocols include a custom sizing cycle that makes every single interface with the rider easily adjustable – from crank length to saddle height, setback and angle, to handlebar location. The size cycle is equipped with a power meter to accurately determine effort intensity, and repeat the intensity when we change one variable at a time. The variables are changed dynamically so we can quickly determine whether the change is a good one or not. We also use video analysis to help the client see how he or she rides a bike. The video analysis is further used as a biofeedback aid to help retrain a rider’s form. Our fitting system represents the best technology we have found to date.

We follow a strict protocol of fitting processes that begins with an extensive interview and documentation of the client’s current setup and riding style. We then optimize the cleats on their shoes and set up the sizing cycle identical to their current bike (unless serious problems exist that make that impractical). Our system coaxes the client to give us feedback so we can then dynamically adjust the saddle and handlebars to a perfectly fit, unique position.

We realize that riders balance differently on a bicycle based on their size, weight, fitness level and riding style. As one rides faster on a bike, more power is transmitted through the legs pressing on the pedals, ostensibly lifting the torso and changing the balance point. A power meter on the sizing cycle accurately measures how much wattage is created, so that the saddle can be set up at the right height and the correct setback. The setback of the saddle is the primary factor that makes the rider comfortable; conversely, an inaccurate setback distance can cause the rider to have too much hand pressure and/or pubic pressure.

The KGS custom fitting process stabilizes the ankle first, then fully defines the saddle height, all while the rider is performing at their desired pace. The client warms up on the sizing cycle and begins the process of observing his individual riding technique on the monitor, becoming aware of how the body actually feels on the bike. Multiple short sessions prevent the client from premature fatigue, and allow the brain to process all the new information it receives. We build a solid foundation of cleats, ankle and saddle before moving on to handlebars. At the end of the session the client then practices and reinforces the new techniques using our video analysis.

After the correct fit is attained, a cross-hair laser allows us to accurately document the custom setup. The captured data can be applied to the existing bicycle (if the bike can be adjusted to the new dimensions) or can be used to create a new bicycle.

This proprietary fitting technique has earned KGS Bikes a reputation around the world for building bicycles with 100% satisfaction, since the bike is truly an extension of the owner.

KGS Bikes is known around the world as the premiere bicycle fitting studio and boutique. Kevin Saunders, President, has over 25 years experience in bicycle fitting and high-end bicycles. In addition to fitting services, KGS Bikes sells bicycles from Parlee, Serotta, Zinn, Co-Motion and Guru. Visit http://www.kgsbikes.com and our blog at http://blog.kgsbikes.com for more information.

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Tags: Bikes, Fitting, Process

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toyota used cars,used cars pricing,used cars bc,used bikes

December 6th, 2009

My Health

shared parts with one another so larger production volume resulted in lower costs for each price range. For example, in the 1930s, LaSalles, sold by Cadillac, used cheaper mechanical parts made by Oldsmobile; in the 1950s, Chevrolet shared hood, doors, roof, and windows with Pontiac; by the 1990s, corporate drivetrains and shared

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platforms (with interchangeable brakes, suspension, and other parts) were common. Even so, only major makers could afford high costs, and even companies with decades of production, such as Apperson, Cole, Dorris, Haynes, or Premier, could not manage: of some two hundred American car makers in existence in 1920, only 43 survived in 1930, and with the Great Depression, by 1940, only 17 of those were left

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.[13]

In Europe much the same would happen. Morris set up its production line at Cowley in 1924, and soon outsold Ford, while beginning in 1923 to follow Ford’s practise of vertical integration, buying Hotchkiss (engines), Wrigley (gearboxes), and Osberton (radiators), for instance, as well as competitors, such as Wolseley: in 1925, Morris had 41% of total British car production. Most British small-car assemblers, from Abbey to Xtra had gone under. Citroen did the same in France, coming to cars in 1919; between them and other cheap cars in reply such as Renault’s

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10CV and Peugeot’s 5CV, they produced 550,000 cars in 1925, and Mors, Hurtu, and others could not compete.[13] Germany’s first mass-manufactured car, the Opel 4PS Laubfrosch (Tree Frog), came off the line at Russelsheim in 1924, soon making Opel the top car builder in Germany, with 37.5% of the market.[13]

See also: Automotive industry Fuel and propulsion technologies
A radio taxi in New Delhi. A court order requires all commercial vehicles including trucks, buses and taxis in India to run on Compressed Natural Gas See also: Alternative fuel vehicle

Most automobiles in use today are propelled by gasoline (also known as petrol) or diesel internal combustion engines, which are known to cause air pollution and are also blamed for contributing to climate change and global warming.[14] Increasing costs of oil-based fuels, tightening environmental laws and restrictions on greenhouse gas emissions are propelling work on alternative power systems for automobiles. Efforts to improve or replace existing technologies include the development of hybrid vehicles, and electric and hydrogen vehicles which do not release pollution into the air.

Petroleum fuels Main article: Petroleum fuel engine Diesel Main article: Diesel engine

Diesel-engined cars have long been popular in Europe with the first models being introduced as early as 1922 [15] by Peugeot and the first production car, Mercedes-Benz 260 D in 1936 by Mercedes-Benz. The main benefit of diesel engines is a 50% fuel burn efficiency compared with 27%[16] in the best gasoline engines. A down-side of the Diesel engine is that better filters are required to reduce the presence in the exhaust gases of fine soot particulates called diesel particulate matter. Manufacturers are now starting to fit[when?] diesel particulate filters to remove the soot. Many diesel-powered cars can run with little or no modifications on 100% biodiesel and combinations of other organic oils.

Gasoline Main article: Petrol engine
2007 Mark II (BMW) Mini Cooper

Gasoline engines have the advantage over diesel in being lighter and able to work at higher rotational speeds and they are the usual choice for fitting in high-performance sports cars. Continuous development of gasoline engines for over a hundred years has produced improvements in efficiency and reduced pollution. The carburetor was used on nearly all road car engines until the 1980s but it was long realised better control of the fuel/air mixture could be achieved with fuel injection. Indirect fuel injection was first used in aircraft engines from 1909, in racing car engines from the 1930s, and road cars from the late 1950s.[16] Gasoline Direct Injection (GDI) is now starting to appear in production vehicles such as the 2007 (Mark II) BMW Mini. Exhaust gases are also cleaned up by fitting a catalytic converter into the exhaust system. Clean air legislation in many of the car industries most important markets has made both catalysts and fuel injection virtually universal fittings. Most modern gasoline engines also are capable of running with up to 15% ethanol mixed into the gasoline – older vehicles may have seals and hoses that can be harmed by ethanol. With a small amount of redesign, gasoline-powered vehicles can run on ethanol concentrations as high as 85%. 100% ethanol is used in some parts of the world (such as Brazil), but vehicles must be started on pure gasoline and switched over to ethanol once the engine is running. Most gasoline engined cars can also run on LPG with the addition of an LPG tank for fuel storage and carburettor modifications to add an LPG mixer. LPG produces fewer toxic emissions and is a popular fuel for fork-lift trucks that have to operate inside buildings.

The hydrogen powered FCHV (Fuel Cell Hybrid Vehicle) was developed by Toyota in 2005 Biofuels Main articles: Biofuel, Ethanol fuel, and biogasoline

Ethanol, other alcohol fuels (biobutanol) and biogasoline have widespread use an automotive fuel. Most alcohols have less energy per liter than gasoline and are usually blended with gasoline. Alcohols are used for a variety of reasons – to increase octane, to improve emissions, and as an alternative to petroleum based fuel, since they can be made from agricultural crops. Brazil’s ethanol program provides about 20% of the nation’s automotive fuel needs, as a result of the mandatory use of E25 blend of gasoline throughout the country, 3 million cars that operate on pure ethanol, and 6 million dual or flexible-fuel vehicles sold since 2003.[17] that run on any mix of ethanol and gasoline. The commercial success of “flex” vehicles, as they are popularly known, have allowed sugarcane based ethanol fuel to achieve a 50% market share of the gasoline market by April 2008.[18][19][20]

Electric

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KGS Bikes Fitting vs. Retul – The Difference Between a Fitting Tool and a Fitting System

November 28th, 2009

My Health

I recently received a call from a client in Dallas who noticed that one of the local stores is installing the Retul 3D Motion Capture System and wondered if it was better than the fitting she received from KGS Bikes. The explanation is a little more involved than a Q&A question so I decided to bump my scheduled ezine article for this one.

The KGS Fitting System, those by Serotta, WobbleNaught, Carmichael, Specialized, Cyfac, Body Scan, Fit Kit and others, use a procedural system that gets a specific outcome and these may or may not even use the data generated by a motion capture system.

Retul has become the gold standard in fitting tools in the past 18 months. The reason I say it is a fitting tool is that Retul can be used with any fitting system. It is 3D Motion Capture System that can accurately measure sensor points which are attached to rider or are indexed to a bicycle.

Retul has a competitor in Dartfish, which is a 2D motion capture system that I own. I am planning on purchasing Retul to augment my fitting services so here is an explanation of how I deal with fitting systems and motion capture systems. The crosshair laser that I use to measure bicycles is another reference tool that is independent of the fitting system. It helps to separate the two as there is overlap and thus room for confusion.

Fitting Systems – KGS vs others. Many of the fitting systems on the market today feature equations or benchmarks that a rider should use to calculate the best way to fit a bicycle. Fit Kit is one of the earlier systems that use a plumb line to determine Knee Over Pedal Spindle, WobbleNaught uses 33 different measurement points of the rider and the bike to get a computer generated setup for that individual rider and that individual bike. Carmichael uses angles and geometry to assure that an individual is set up within an acceptable range of angles on the bike. Serotta and others use a combination of measurements and riding on either the owner’s bike or a setup bike.

What separates the KGS Fitting System from the others are two specific processes:

1) I have developed a system of finding the best, most efficient and balanced position for an individual using my custom setup bike, through scientific analysis using a step by step approach to find that perfect setup whether the rider is young or old, fit or unfit.

2) The use of a setup bike with a power meter, that is 100% infinitely adjustable and capable of producing the workload that you as the rider really produce on the road, is critical. My system determines a proper bike setup, rather than a setup based on the limitations of a specific bike.

Fitting Tools – Setup bike. The setup bike was just described and is the core of my fitting system. It has road, mountain and time trial handlebars, different saddles, adjustable cranks from 150-230 mm and almost all modern pedal systems. Since the bottom bracket is the datum point, every other conceivable position is determined by the location of the saddle and handlebars. Since all riders interface with the bike in exactly the same place, (pedals, handlebars and saddle), if the setup bike is able to be positioned to find the rider’s best position it can be found, documented and repeated.

The setup bike is not the system any more than one’s bike on a trainer would be. In fact, my system is good enough to find the perfect setup even if it would be difficult to build a real bicycle with those specifications. This is because I don’t assume that the bicycle industry has created a stock frame for you, I assume nothing. When we get through the fitting process we know exactly how to build a frame that is perfect for you, or to specify a stock frame that works with your body.

Cross hair laser – This fitting tool is what I use to accurately measure the handlebars and saddle relative to the bottom bracket. These lasers do nothing but project two lines into space, but the accuracy attainable from this device is fantastic.

Dartfish Advanced Video Analysis – I bought the Dartfish software and used it with my fittings for a few years but found that the only thing that really worked well was the ability to show ankle placement and the time it took to show the client problems was better spent in showing a solution rather than highlighting the problem. Dartfish is a great tool and some clients can benefit from it but most are better off letting me show them how to get better form rather than see how bad their form is in the first place.

Retul – The Retul system is a 3D motion capture system. The reason I am getting one is the ability to capture the fitting session and not only save that data but analyze it with other setup data. I have the ability now to get people setup properly on the bike. That is not the point. Having a system that gives me better resolution of all the aspects of a rider’s position and being able to save it is important. Another part of the Retul system is a sensor that can be triggered when it touches parts of the bike so the critical dimensions of the setup bike can be captured more quickly and with the same accuracy that I use now. I can save a few minutes doing documentation which usually means I get more time to spend helping the client with specific problems.

In summary, a bad fitter will not do a significantly better job with Retul. All the fitting procedures and knowledge that the fitter used prior to the acquisition of Retul are used after the device is purchased so many bike shops are still stuck with the age old discovery: Bike fitting is not easy.

It has taken me years of study to get really good at bike fitting and I still learn things every day. I feel lucky to have a studio that I can use to really do a client some good. I can’t speak for other shops and studios, but I work not only hard but as smartly as I can to put the client first and get an awesome outcome. I can’t wait to get my own Retul system but the fact that I just have my knowledge, skills and setup bike means that current fit clients will get what they want and need, which is a custom setup that works for them.

At the end of the day, I still find a lot of stock bikes don’t fit grownups well. It is irritating as I have a lot of educating to do when people find out that it is not they that are abnormal, but the bike they want to buy that may not be the one for them.

KGS Bikes is known around the world as the premiere bicycle fitting studio and boutique. For over 25 years, Kevin Saunders, President, has sold high end bicycles and has studied bicycle fitting. KGS Bikes sells bicycles from Serotta, Parlee, Zinn, Co-Motion and Guru, in addition to fitting services. For more information visit the KGS Bikes website, http://kgsbikes.com and our KGS Bikes blog, http://blog.kgsbikes.com.