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SpeedoDRD - Speedometer "Digital ReCalibration Device"

•The smallest electronic speedometer/odometer calibration device in the world
•Saves max speed, which can be recalled to your stock speedometer gauge
•Widest calibration range on the market (ratio based and multiplier/divider capability)
•Built in testing mode to ensure proper installation
•Easier to setup than any other device on the market
•Priced below any competing product on the market
•Simple plug-in installation for many vehicles using factory OEM connectors
•Works for any 3 wire Hall Effect Sensor, or 2 wire Ground Switch Sensors
•Works for vehicles which display MPH or KPH
•Ability to convert MPH to KPH, or KPH to MPH
•Ratio based correction in 0.1% steps, up to 99.9% + or -
•Fractional frequency multiplier & divider with 0.1 steps, up to 99.9 + or -
•Weather proof design to protect against the elements
•18" wiring harness (1.5ft)
•3 year product replacement warranty
•Made in the USA
Universal version available for motorcycles, Cars & Trucks without OEM Plug-In support.
OEM Plug-In support for over 200 popular motorcycle models, and more kits are in development.

*Version M is now available which has a built in fractional frequency multiplier and divider, in addition to the ratio based frequency adjuster. This is a special application feature that allows users to do complete gauge cluster or transmission swaps with vehicles that have completely different PPM (pulse per mile) rates, no other calibration device in the world has a wider frequency adjustment range.

€ 79,95
Is this device compatible with a fuel programmer or other devices...
Yes, make sure to connect the other device directly to the speed sensor, then connect the SpeedoDRD; The SpeedoDRD should be the last device in the chain of devices, so it connects to the main harness which goes to the ECU or Gauge Cluster.

Why would you need a Speedometer/Odometer Calibrator...
Many vehicles (especially motorcycles) come from the factory inaccurate, sometimes as high as 10% off. Also, modifications such as tire size changes or gearing modifications can cause significant speedometer inaccuracies. Thus the speedometer calibration device is used in series with the speed sensor in order to correct the signal before it reaches your vehicles ECU computer. SpeedoDRD works for vehicles which are manufactured with electronic needle or digital readout speedometers, with 2 wire or 3 wire speed sensors.

How accurate is 0.1% correction steps?
If you were traveling 60mph (or 60kph), 0.1% of that would be 0.06mph (or 0.06kph)
If you were traveling 200mph (or 200kph), 0.1% of that would be 0.2mph (or 0.2kph)
If you were traveling 300mph (or 300kph), 0.1% of that would be 0.3mph (or 0.3kph)
Thus correction steps of 0.1% are more than enough to get your speedometer more accurate than your gauge cluster is capable of displaying.

Odometer vs Speedometer Correction...
SpeedoDRD does allow for Speedometer and/or Odometer correction, although sometimes getting them both 100% correct continuously is not possible, this is because some vehicles have an odometer error rate which is not equal to the speedometer error rate, since your ECU uses the same signal to determine both the odometer reading and the speed reading, and sends the information to the gauge cluster, this type of problem lies within the ECU or gauge cluster itself. If you find yourself in this situation, you will be able to get your speed 100% and the odometer very close. Or you can choose to get the odometer 100% and the speed very close, or you could even choose a happy medium between the two, and get them both equally close, its up to you, and it depends on how far apart the two error rates are from each other.

To determine your Distance error rate, use this formula:
100 - ((Actual Miles Traveled / Miles Displayed on Odometer) * 100) = Distance Error Ratio
where "Actual Miles Traveled" is a mileage reference which is known to be accurate, such as by a rolling wheel ruler, or laser distance measuring tool, GPS device, etc.

To determine your Speedometer error rate, use this formula:
100 - ((GPS Speed / Speedometer Readout) * 100) = Speed Error Ratio

To determine the correction ratio for an error rate, you simply invert the sign, example:
for a 7% error rate, you would need a -7% correction ratio entered into your SpeedoDRD device

Another factor to consider is that your odometer has probably been racking up inflated miles for quite some time now, so if your odometer is around 4% errored and your speedometer is around 6% errored, and you already have put 1000 miles on your vehicle with an errored speedometer signal, you really only have only put 960 miles on your vehicle, thus if you correct for the speed using a -6% correction ratio to get 100% accurate speed readings, you will cause a -2% correction on the odometer. This means that 2000 miles after using your -6% correction ratio, your odometer will finally read what it actually should. This is the most common situation among users which have error rates which are not equal, because the speed almost always has a higher error rate than the odometer if the two error rates are not equal. For this reason, and in most circumstances, it is usually best to go ahead and select to calibrate your speed to be 100% accurate.