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  • How do I measure the wheel circumference?

    1. Align the valve on the front wheel so that it is precisely vertical to the ground. 
    2. Mark this point on the ground with a line (e.g. using chalk).
    3. Push the bike one wheel rotation forward until the valve is again vertical to the ground.
    4. Mark this point on the ground as well.
    5. Measure the distance between the two marks. That is your wheel circumference.
    6. Enter the wheel circumference into your VDO computer.

  • Which models can be retrofitted with a wireless cadence function?

    Only models M3.1 WL, M 4.1 WL, M5, M6, M6.1 and MC2.0WL can be retrofitted with a wireless cadence function.

  • Wireless model attachment tip: where should the transmitter be attached? Right or left?

    The computer can be attached to the right, left or stem. If attached to the right of the handlebars, the transmitter must also be attached to the right of the fork.

    If the computer is attached to the stem or the left of the handlebars, the transmitter MUST be attached on the left.

  • Wireless model attachment tip: how does the magnet have to be attached?

    It is important that the magnet passes a particular position on the transmitter housing (the point where the pulse electronics are installed).

    A small sensor mark can be found on the transmitter. Attach the transmitter so that this sensor mark is pointing at the spokes. Attach the magnet so that the middle of its surface is aligned with this mark. If the magnet is attached higher or lower, this can lead to ‘jumping’ or ‘duplicated’ speed data.

    Push the transmitter onto the fork or the magnet onto the spoke until the precise position has been achieved. The magnet must pass the transmitter at a distance of 5-10 mm.

    If the gap is bigger than this, the incorrect speed can be displayed when moving at faster speeds.

  • Wireless model attachment tip: what sources of interference are there?

    Please do not attach the computer in direct proximity to a mobile phone, GPS device or halogen or LED bulb. The mobile phone transmits position signals, which can interfere with the wireless tachometer’s receiving performance.

    In the case of the GPS device, the GPS receiver interferes with the wireless tachometer’s wireless transmission. In the case of halogen or LED bulbs, the electronics create a magnetic field, which can also influence the wireless tachometer’s wireless transmission.

  • Wireless model attachment tip: what is the wireless range of the computers?

    The ranges depend on the model series and the wireless frequency used.


    wireless range for speed 0.75 m, cadence 0.90 m, heart rate 0.75 m

    MC 2.0 WL:

    wireless range for speed 0.75 m and cadence 0.90 m

    In the Z-series, the wireless range is approx. 1.20 m for the speed and the cadence.


    wireless range for speed approx. 0.75 m and for cadence approx. 0.90 m

    For the A4+ and A8+ series, approx. 0.60 m to 0.75 m for speed.

  • Wireless model attachment tip: is the transmitter attached below the brake?

    Do not attach the transmitter directly below a cantilever brake, e.g. a Magura hydraulic brake. The metal casing of the cantilever brake diverts the wireless signal, potentially preventing it from reaching the computer.

    The gap between the transmitter and the cantilever brake or Magura hydraulic brake should be at least 10 cm.

    On mountain bikes with disc brakes, the transmitter can be attached a few centimetres above the brake disc. On road bikes, the transmitter should be attached to the lower third of the fork leg.