Stendec Data

Dave Garland introduces Stendec Data, the first dedicated acquisition system for Downhill / Enduro / XC and advanced testing of components.
With over forty years of collective knowledge behind this ground-breaking data system, it is now possible to close the gaps in lost time from start to finish.
In the past five years we have seen downhill winning margins go from seconds to thousands of seconds, adjusting for these tiny increments of time is now more critical than ever, making an adjustment in the wrong direction is all too easy.

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Stendec Data has been designed from the ground up, borrowing nothing from any other application, which has been the brief for this ground-breaking project since its conception.

What this system measures is the rider interaction with the bike in all aspects and very quickly balances out that relationship. It is easy to read and helps the rider and mechanic make isolated adjustments on the bike to bring a perfect balance quickly. Many people make the mistake of pointing the finger at suspension assuming that it is the cause of an unwanted ride characteristic, there is much more to consider.

Stendec Data has a very powerful unique processor that allows you to quickly analyse groups of data that identify the correct adjustment. It is a dynamic system processing your input and the forces produced when covering varying types of surface at speed. Coupling the correct sequence of graphs together is the key to making critical decisions, embedded as defaults there are number of scenarios that guide you to those adjustments, you can also program your own multiple scenarios as needed.

There are many other tools within this system to call on, you choose how to select and read data in the way you see fit.

Rear brake mount housing speed / wheel lockup sensor
Rear axle movement sensor
Bespoke mounts machined for all manufacturers

Always updating software, keeping up to date with improvements and changes in this rapidly evolving sport is an ongoing feature, future proofing the system.

Weight is around 250 grams, much of the system is hidden, electronics normally housed inside the frame inserted through the head tube or other apertures such as lower in the seat post, battery is in the steering tube, rear sensors are housed in a custom brake mount. All the other components are fitted in a very minimalist discrete way.

Collection of data is via WIFI or hard wire which takes about 30 seconds when the bike comes into the pit downloading onto the mechanics laptop.

Stendec Data has a full-time dedicated camera bar mounted and is synced with all graphs providing visual backup to the graphs, this allows you to see what is producing the data and faster problem solving.

By following the correct data reading path it is possible to find many saved seconds on any DH course.

Sensors – Front axle movement & rider input sensors

Brake pressure sensors for inline mounting

The data system is transferable between bikes, this takes about 30mins but at Stendec we feel that this system lives with the rider permanently, that has always been the intention of this system.

The great thing is that you can discuss test days with the rider or mechanic and decide what adjustments to make without being present, this has already been proven to great effect.

We will provide training for the necessary people, which is one day, to have enough understanding to start working efficiently with the system, if additional days are required that is also possible.

There are some simple exercises which need to be followed which helps you quickly understand what you are looking at when analysing data, it does not require that you have to have world cup standard rider with you if you are the mechanic.

Learning how to better understand data is to produce your own, the more you produce the more dialled in you are. Ease of reading data is our ultimate goal.

‘’I NEED TO FIND SOME TIME’’ The most used quote of a downhill racer that almost won something.

CONTROL PANEL
The control panel is where you make all graph selections. To the left is the list of parameters that can be selected individually, overlaid, or selected in up to four different views with all graphs aligned together for ease of reading.

To the right of the parameters are a series of coloured bars which can be changed relative to how you view the graph information, further along are all the values of each parameter. A multiple of runs can be selected for analysis. There are many other settings that can be altered in the control panel that allow the user to decide exactly how they view the graph information.

In this main screen displayed four graph windows are selected at the top front and rear axle movement, second main frame vertical movement, third lateral movement left to right, fourth front and rear brake pressure, rear wheel speed and lock up. To the left of the main screen is the video playback of an entire run and is synced in time with every graph selected. It is possible to scroll backwards and forwards to find the information required to make an exact adjustment, the video playback follows this in either direction to give you an accurate visual display. At the bottom of the main screen is the trace bar, this allows you to see all the variables of data allowing you easily to access parts of the data that need to be analysed. You can also zoom in and out if required.

Seen here in the control panel in the top left are multiple logs ready for selection for comparison.

FRONT AND REAR AXLE GRAPH
In this example front and rear axle movement are close to being obtained, further small adjustments based on other graph views will provide additional information allowing correct adjustment to be made

FRAME VERTICAL GRAPH
In this view it is possible to see the main frame movement, the objective is for frame vertical to be as stable as possible, i.e.: close to the zero-centre line on the left-hand side of graph two. When graphs one and two are read simultaneously you begin to see the importance of front and rear axle equalization, virtually isolating the main frame from any movement, thus producing stability.

LATERAL MOVEMENT LEFT AND RIGHT GRAPH
Reading this graph allows the user to see how much lateral movement is being produced left or right by the rider. There are several reasons why excessive lateral movement occurs which is explained in the full manual.

FRONT AND REAR BRAKE PRESSURE/REAR WHEEL SPEED AND REAR WHEEL LOCK UP GRAPH
This graph displays how much braking is applied by the rider. The information that is obtained in this graph gives vital insight to excessive brake dragging, rear end flex, incorrect operation of callipers or levers, and many other parameters that produce brake pressure which is explained in the manual.

RIDER INPUT AND FRONT AXLE
This graph shows a good balance of front axle movement and rider input at the front end, for example, if the rider input shows higher values than the axle input this is considered to be an imbalance that must be rectified. The objective is to have a front axle reading and rider input reading almost mirroring each other, or for the rider input to show a lesser reading than the axle input. Obtaining this balance dramatically improves the relationship between rider and bike.

As an example, when looking at these four graph selections either in testing or practice at an event will guide you to the correct adjustment across the platform coupled with video playback for visual reference.

Other graphs – From the control panel you can select many graphs to evaluate rider and bicycle input. They are in order from top to bottom:

front axle movement
rear axle movement
frame vertical
rider input
lateral L&R
front brake
rear brake
rear wheel speed
acceleration/deceleration
corner arc
front end dive
lean angle L&R