The Equipment Problem Unique to Para Track Cycling

Watch a C-class race at the Para Track World Championships and much of the equipment will look familiar.

Carbon track frames, disc wheels, large chainrings, aerodynamic helmets and increasingly aggressive riding positions belong to the same performance environment as an elite able-bodied World Championships. Side by side there would be little to identify which championship some bikes were being prepared for.

Look more closely at the rider and the engineering problem can be very different.

An Olympic track programme can spend extraordinary amounts of time and money reducing aerodynamic drag, increasing drivetrain efficiency or finding a better interaction between rider and bicycle. Almost all of that work begins with several assumptions. The rider has two conventional contact points at the pedals, two at the handlebars and a broadly conventional relationship with the saddle. Different athletes still require different positions, but the basic mechanism through which they support themselves, steer and transmit force into the bicycle has largely been established before the performance engineers arrive.

For some Para cyclists, establishing that mechanism is itself part of the performance work.

A prosthesis may determine how force reaches the crank. A limb deficiency can change the most effective crank configuration. An upper-limb impairment can alter how the rider supports the torso and interacts with the front of the bicycle. Impaired muscle power or range of movement can make a theoretically aerodynamic position physiologically unusable. Asymmetry may need to be accommodated rather than designed away.

The search for speed can therefore begin before the usual questions of helmet shape, extension angle or wheel choice are even relevant.

Before the wind tunnel

Some of the clearest examples come from lower-limb prosthetic research. A 2009 study into cycling with transtibial amputation included pilot work with an unnamed elite Para cyclist. Researchers removed the flexible prosthetic foot, attached the cycling cleat through a stiff custom interface and shortened the crank on the affected side by 15mm. Work asymmetry, initially measured at 30 per cent, fell to 7 per cent with the combined changes.

The authors were cautious about generalising the result, and the wider testing explains why. Shortened cranks produced different responses between riders, including one subject for whom the change made no difference at all. The significance was not the 15mm figure by itself, but the extent to which changing the relationship between one athlete, one prosthesis and one bicycle altered how effectively that athlete could use the function they had available.

Research published in 2026 reached the same area from another direction. Twelve cyclists with unilateral transtibial amputation rode using both daily-use and cycling-specific prostheses while researchers changed effective prosthetic leg length. Increasing that length by as much as 15mm produced little effect on efficiency or asymmetry under the test conditions. Changing the prosthesis did considerably more: the cycling-specific design reduced knee-angle asymmetry from 11 per cent to 3 per cent and increased net efficiency from 21.4 to 22.3 per cent, while crank-power asymmetry remained largely unchanged.

A prosthesis can alter the movement of the knee without producing the same change in power symmetry. A crank configuration which works for one rider can achieve little for another. An interface which allows an athlete to use their available musculature more effectively can simultaneously change pelvic movement, hip angle or the position they are able to sustain at race speed.

By the time an Olympic pursuiter arrives for aerodynamic testing, much of the mechanical relationship between body and bicycle is already taken for granted.

For a Para rider, some of those variables can still be moving.

Jody Cundy has described how his racing prosthesis evolved through successive generations after his move from swimming into cycling. Initially the work concentrated on attachment, using a vacuum system to lock the leg securely enough for efficient pedalling. By London 2012, British Cycling's aerodynamic specialists and prosthetics company Össur were working on frontal area, weight and the external shape of the leg.

The prosthesis Cundy raced in London was therefore the product of several years spent learning how he interacted with a track bike at elite intensity. Once attachment had been improved, force transfer and aerodynamics could receive more attention; alter the external shape and its relationship with the rider and bicycle had to be considered again.

Bike fitting, biomechanics, prosthetics and equipment development begin to merge into the same process.

When the prosthesis becomes part of the race machine

An upper-limb prosthesis developed for another elite Para cyclist ahead of the Tokyo Paralympic cycle shows how far that overlap can go.

The athlete is not identified in the published technical paper, but the design process is unusually revealing. CAD, body scanning and extensive 3D printing were used to develop a cycling-specific arm prosthesis intended for an aerodynamic time-trial position. Reducing drag was part of the design brief from the beginning.

Researchers digitally modelled the athlete's residual limb and torso, produced different prosthetic forms and added relief where the rider's body or knee would otherwise contact the prosthesis while pedalling. A ball-and-socket connection provided the support point on the bicycle while still allowing the movement required at race intensity.

The designers assessed the rider, bicycle and prosthesis as one aerodynamic form.

That is a long way from treating the prosthesis as a medical device attached to somebody who happens to be riding an aerodynamic bicycle.

Its shape influences frontal area and airflow, but also support and control. Change the prosthesis and the optimal handlebar position may change with it. A different support point may allow the athlete to lower the torso; a different torso position can alter which helmet or extension configuration works best.

The same project also had to negotiate regulation. Alternative designs were considered while comfort, biomechanics, manufacturing and drag all had to sit inside a rule structure intended to allow an impairment-related adaptation without turning that adaptation into an unrestricted aerodynamic device.

That boundary is much less tidy than a maximum handlebar width.

There is no standard C-class rider

It would be easy to make this entirely about prostheses, which would miss much of what makes C-class equipment difficult. Two riders standing beside one another at the start gate can require completely different solutions.

One may be trying to improve force transfer through a lower-limb prosthesis. Another may require an altered control or handlebar arrangement because of an upper-limb impairment. A rider with restricted movement may reach a limit in hip or knee angle long before an aerodynamicist reaches the position they would choose from a CFD model. Another may be capable of producing substantial power but require a different support arrangement simply to hold the torso where it needs to be.

Visual symmetry does not necessarily provide a useful target either.

The conventional bicycle encourages symmetrical thinking because the machine itself is symmetrical. Para sport makes that assumption less secure. Where an athlete's functional capability is asymmetric, forcing their interaction with the bicycle towards symmetry can simply create a cleaner-looking version of a slower position.

What matters is how much of the athlete's available function reaches the track. Only after that has been understood does the familiar track-cycling optimisation process really begin.

Then aerodynamics arrives

Once a workable athlete-machine relationship exists, a Para programme still has exactly the same problems with aerodynamic drag, rolling resistance, drivetrain losses and equipment interaction as everybody else.

Changes made for aerodynamic reasons can then feed straight back into the earlier work.

A prosthetic change which improves pedalling mechanics might increase frontal area. A lower torso position might test faster but reduce the athlete's ability to stabilise themselves or produce power. Different crank lengths can alter joint kinematics, changing movement through the pedal stroke and therefore the shape presented to the airflow.

Even conventional equipment choices become individual again. Helmets are sensitive to head and back position. Extension geometry determines not only frontal area but how the rider supports the body. Saddle position alters both power production and the relationship between torso and legs.

Olympic track cycling has gradually moved away from talking about isolated components and towards the complete rider-bike system.

Para track often reaches the same point with a rider-bike interaction that was much less standard to begin with.

Fifty-two versions of one leg

Denise Schindler's preparation for Rio gives some sense of how much development can sit behind one apparently simple component.

The German rider worked with Autodesk on a new competition prosthesis. Producing one through the previous plaster-casting and hand-finishing process could take around ten weeks. Schindler's residual limb was instead digitally scanned, allowing engineers working across several countries to develop and share the design virtually.

They went through 52 digital versions before settling on the final form.

The prosthesis was then 3D printed. Autodesk said the digital process could reduce production time to as little as five days and the cost to around a quarter of the previous method.

Fifty-two versions says more about the development burden than the finished prosthesis ever could. It also shows where newer manufacturing techniques might reduce part of that burden. Digital scanning, transferable CAD files and additive manufacturing allow designs and expertise to move much more easily than a process dependent on repeatedly bringing the athlete back to the same workshop.

Colin Lynch reached a similar problem through a very different route.

Ahead of Rio, the Irish rider worked with Bournemouth University's Bryce Dyer and Pace Rehabilitation on a new aerodynamic racing prosthesis. Several designs were developed and tested before the final version was built, continuing a relationship which had already produced a prosthesis for Lynch at London 2012. He subsequently raced the newer design to silver in the 3km pursuit at the World Championships.

The engineering was sophisticated, but Lynch had needed to crowdfund £8,000 towards the prosthesis he intended to use in Rio. He was already a double world champion and Paralympian, raising money for the interface through which he would race his bicycle.

The advantage hidden in the workshop

Lynch's route was not the same as Schindler's, and neither depended on a large national federation doing everything internally. One combined a university and commercial prosthetics specialist with funding raised by the athlete; the other brought together an elite rider and a global design and manufacturing company.

A large national programme changes the frequency with which that kind of work can happen.

The Australian Institute of Sport has a dedicated engineering operation of nine sports engineers and a machinist producing individual equipment solutions for Para athletes, including equipment which is not commercially available.

British Cycling's relationship with Renishaw continues through the Los Angeles cycle, with the organisations working on aerodynamics, mechanical optimisation and advanced manufacturing, including metal additive manufacturing.

Put those capabilities close to the performance programme and the pace of development changes. A coach can notice something, a biomechanist can quantify it, an engineer can redraw a part and a machinist or additive-manufacturing specialist can produce the next version without the athlete having to find each piece of the process separately. The rider tests it, the data expose another limitation and the design changes again.

A smaller programme may have to locate the right external specialist, explain the problem, secure funding, arrange manufacturing and then work out how to test the result. By the time its first prototype exists, a national institute with the right people already in place may have learned from several.

Two riders can then arrive in Apeldoorn on apparently comparable carbon frames, disc wheels and tyres while having received profoundly different levels of technical support before either bicycle reached its current configuration.

The difference might be a bracket almost hidden underneath the rider, a modified support point or a prosthetic interface nobody notices. What separated the two programmes happened earlier: identifying the limitation, understanding it correctly and being able to produce and test another solution quickly enough to learn from it.

The strange economics of LA28 equipment

Set that beside the direction Olympic track equipment is taking into Los Angeles.

The UCI has approved maximum prices for equipment used at the 2028 Olympic Games. From 1 January 2027, price caps will apply to framesets, forks, wheels, handlebars and extensions, helmets and skinsuits. They sit alongside registration and availability requirements intended to make Olympic equipment accessible to competing nations, with the UCI explicitly describing the caps as a way of preventing excessive cost barriers.

A frameset gives the regulator something tangible to control. It has a manufacturer, a retail price and, in principle, a version another nation can buy. The same is true of a wheel or handlebar.

That calculation becomes much less useful when the performance gain emerged from repeated biomechanical assessment, a prosthetist working alongside a coach, aerodynamic analysis, access to a machinist and several prototypes produced because each previous version taught the programme something.

The final part may not be particularly expensive. Its development environment can be.

Para sport already recognises equipment access in principle. The IPC equipment policy includes universality, with the cost and large-scale availability of principal equipment components to be considered so that sufficient numbers of athletes can access the sport.

Applying that principle becomes more complicated when the best solution may be useful to exactly one athlete.

An Olympic frameset can be made available to every nation. Cundy's prosthesis cannot simply be put into a catalogue and offered to C4 riders around the world because another rider may have a different residual limb, different movement, different power production and an entirely different problem requiring another solution.

The performance gap can therefore sit somewhere commercial availability never reaches. Everyone may have access to the same frame while only one programme has the expertise to recognise that the athlete needs something different around it.

When cost control reaches the wrong thing

Restricting that development would create its own problem. If an athlete's impairment prevents them interacting optimally with a conventional bicycle and engineers can create a better solution, limiting the work because another federation cannot afford the same expertise would leave that athlete with a poorer interaction simply because their impairment requires more engineering to solve.

That is different from an Olympic programme arriving with an exceptionally expensive wheel or frameset. Those products can improve performance, but they do not normally determine the basic mechanism through which the rider is able to use the bicycle.

With Para equipment, the adaptation can.

Limit development too aggressively and regulation begins to influence how successfully an athlete can use the function they have. Leave development entirely to whatever resources sit behind each rider and the other extreme is already visible in the distance between an institute containing engineers and machinists and a world champion crowdfunding an £8,000 prosthesis.

Schindler's project points towards part of an answer. Digitisation reduced manufacturing time and potentially reduced cost, while transferable CAD files allow designs to move beyond the workshop where the original work was done.

Someone still has to recognise what needs changing, decide what to scan, interpret the athlete's movement, determine whether the prototype has solved the original problem and then decide what to alter next. A printer can reproduce the part; the accumulated judgement behind it is much harder to transfer.

Where adaptation ends

Cost is only one part of the problem. Individually engineered equipment also leaves the regulator deciding what constitutes accommodation and what constitutes advantage.

Para equipment cannot simply be governed by applying conventional bicycle regulations and treating anything different as an advantage. Adaptive equipment can form part of the athlete's ability to perform the sport at all, which means impairment, function and performance have to be considered together.

An altered support may allow an athlete with an upper-limb impairment to sustain a position they otherwise could not hold. Shape that support differently and it may also reduce aerodynamic drag.

A cycling-specific prosthesis may allow a rider to transmit force more efficiently, exactly as it was intended to do, while simultaneously making the complete rider-bike system faster.

Removing every performance consequence from an adaptation would defeat much of the purpose of developing it properly. The regulatory judgement is therefore not simply whether the adaptation makes the athlete faster. In many cases it should. It is how far that improvement remains part of enabling the athlete to use their available function, and where a separate technological advantage begins.

Those two things will not always separate cleanly.

What the stopwatch cannot show

One rider stops the clock. Another rider is faster.

The results do not record how many versions of a prosthetic interface were produced, whether the crank configuration came from biomechanical testing, whether the athlete's support position developed through months of CAD and machining or whether the rider had to crowdfund the component at all.

High-performance sport has never been a laboratory comparison of athletes stripped of their surrounding systems. Coaching matters, as do sports science, aerodynamic knowledge, access to facilities and money.

Para track extends that influence further into the athlete-machine relationship itself.

One C-class rider can have biomechanists, prosthetists, aerodynamicists, engineers, a dedicated workshop and rapid manufacturing moving around them. Another athlete with comparable sporting potential can have a coach, a commercially available bike and whichever specialist expertise they have been able to find or afford independently. Both eventually appear on the same timing screen.

There is no sensible rule which says Australia may employ only two engineers, Britain cannot work with Renishaw or an athlete may receive only three versions of a prosthesis. Imposing those restrictions would make Para cycling worse.

If the gap is to narrow, more athletes and programmes need access to the expertise capable of solving these individual problems. That is considerably more difficult than requiring a manufacturer to put a frame on sale.

Olympic track cycling is moving towards controlling the price of equipment because the UCI does not want access to the fastest bicycle determined by the nation an athlete represents.

Para track is less tidy because there may be no single fastest bicycle to make available. Part of the performance system can have to be designed around the athlete standing beside it, and the ability to do that repeatedly, quickly and well is already concentrated in a relatively small number of programmes.

When the riders roll to the start line in Apeldoorn, the frames will look familiar. The disc wheels will sound the same and the results will reduce everything to hundredths of a second.

What it cannot show is how much engineering was required to get each athlete into the position from which those hundredths were produced — or how different that process might have been had they been wearing another nation's colours.