Bosch Smart System with rim magnet – expertise & tuning options

Bosch Smart System with rim magnet: BDU logic, EBTsmart, Switch & suitable tuning solutions

Who one Bosch Smart E-bike system with rim magnet Drivers should not choose the right solution based solely on model name, year of manufacture, or terms like "Gen5". The decisive factors are... Bosch Smart System / BES3, Rim magnet, the exact BDU identifier as well as special cases such as ABS, ABS-Pro or e-Shift.

This page explains the system logic behind it. Bosch Smart System with rim magnet and then leads to the appropriate solution. You can find the complete product overview here: Bosch rim magnet tuning.

Quick decision-making aid

  • EBTsmart Unlock Key: Main solution for Bosch Smart System with and without rim magnet – without additional hardware.
  • EBTsmart Unlock Key Switch: Special solution for when a deliberate switch from rim magnet to spoke magnet/sensor logic is desired.
  • VOLspeed / SpeedBox / Badass Box: Classic modular or box solutions depending on the BDU, sensors and special case.

Quick navigation:

Instant check | Wheel magnet basics | BDU37, BDU38 & SX | EBTsmart Unlock Key | EBTsmart Unlock Key Switch | Comparison | More solutions | Conclusion

Bosch wheel magnet: the correct selection sequence

  1. Check system: Bosch Smart System = BES3
  2. Check magnet: classic spoke magnet or rim magnet / valve magnet
  3. BDU check: BDU37, BDU38 or SX / BDU3142–BDU3145
  4. Check special cases: ABS, ABS Pro, e-Shift
  5. Only then Select a specific solution

Typical relevant groups at Bosch Smart System with rim magnet:

  • BDU37 = previous Bosch Smart System / BES3 family in the rim magnet environment
  • BDU38 / BDU384Y = newer Bosch Smart System / Gen5-related family
  • BDU3142 / BDU3143 / BDU3144 / BDU3145 = Bosch Performance Line SX in Smart System
Bosch Smart Rim magnet system

Why Bosch Smart A system with a rim magnet is a special case.

In newer Bosch Smart In e-bike systems, the magnet is no longer classically located on a spoke, but rather in the area Rim, valve or rim magnetThis changes the way speed is measured. Therefore, many older Bosch tuning methods from the BES2 world cannot simply be transferred.

Bosch Smart System bikes with rim magnets require specially adapted solutions. The distinction between a... is particularly important. Pure license solution without additional hardware and an Hardware solution with sensor, module or external box.

Important: A rim magnet does not automatically mean that the EBTsmart Unlock Key Switch is needed. The normal EBTsmart Unlock Key is the main solution for Bosch Smart System with and without rim magnet. The switch is a special solution for when a deliberate change to spoke magnet/sensor logic is desired.

BDU37, BDU38 and Bosch SX: Which families are particularly important?

Group classification Peculiarity
BDU37 frühere Bosch Smart System / BES3 Family important rim magnet base in the former Smart system area
BDU38 / BDU384Y newer Bosch Smart System / Gen5-related family crucial for current rim magnet and Gen5-like product logic
Bosch SX / BDU3142–3145 Performance Line SX in Smart System eigene SpeedBox- and special logic

EBTsmart Unlock Key – Main solution for Bosch Smart System with rim magnet

The EBTsmart Unlock Key is the central software-based main solution for Bosch Smart System / BES3 – with and without rim magnetIt works via a browser connection using a USB connection and requires no additional tuning hardware on the bike.

  • For Bosch Smart System / BES3
  • With and without rim magnet suitable
  • No additional hardware required. on the bike
  • Up to 32 km / h with correct speed, distance and mileage values
  • Further optional unlocking is possible, depending on the configuration.
  • ABS: relevant up to 32 km/h

View EBTsmart Unlock Key

EBTsmart Unlock Key Switch – Special solution with tuning sensor and spoke magnet

The EBTsmart Unlock Key Switch This is not a more powerful version of the regular EBTsmart Unlock Key, but rather a separate technical alternative. It makes sense when... Bosch Smart System with rim magnet deliberately deviates from the original rim magnet logic to a Spoke magnet/sensor logic is to be changed.

The bike will be digitally converted via license. Additionally, a Tuning sensor , and a Spoke magnet It is installed. The tuning logic then runs via this sensor.

  • For certain Bosch Smart System bikes with rim magnet
  • Digital switching from rim magnet to spoke magnet
  • Tuning sensor + spoke magnet included
  • Activation and parameterization possible via sensor logic
  • Up to 45 km / h possible
  • Not for ABS

When does switching make sense?

  • When a Switching from rim magnet to spoke magnet is preferred.
  • If the tuning involves a separate tuning sensor to be activated.
  • If additional Parameterization via the tuning sensor is desired.
  • When a clear hardware logic with sensor and spoke magnet is preferred.

The three operating modes of the tuning sensor

modus Other specifications
Tuning permanently activated The speed limit has been lifted. The actual speed is only displayed up to approximately 22 km/h.
Tuning permanently deactivated The e-bike functions as in its original state with motor support up to 25 km/h and correct speed display.
Tuning according to switch-on condition When the e-bike is switched on, the system determines whether the tuning should be active. For activation, the magnet must be in front of the sensor for at least 4 seconds when the e-bike is switched on. Otherwise, the tuning remains deactivated.

View EBTsmart Unlock Key Switch

Comparison: Which solution suits you best?

Solution Concept Suitable for Power Important notes
EBTsmart Unlock Key Software tuning / browser-based Bosch Smart System with and without rim magnet No additional hardware required, accurate readings up to 32 km/h first main recommendation
EBTsmart Unlock Key Switch digital switching + sensor solution certain Bosch Smart System rim magnet configurations Switch to spoke magnet/sensor logic, sensor modes Special solution, not the standard approach
VOLspeed module suitable Bosch Smart System rim magnet configurations The original wheel magnet is retained; installation is invisible. BDU and special cases are examined
SpeedBox Module / partly with app SX, BDU37 and BDU38 depending on the variant specialized modular solution It is essential to check the exact BDU identification number.
Badass Box 5 BDU37 / Badass Box 5 BDU38 external box BDU37 / BDU38 with rim magnet Quickly assembled special solution not the first main recommendation

Other solutions: VOLspeed, SpeedBox and Badass Box 5

Besides EBTsmart and Switch, classic hardware solutions remain relevant. They are particularly suitable for users who deliberately prefer a module or an external box.

SpeedBox for Bosch SX and BDU38 with rim magnet

Badass Box 5 for Bosch rim magnet

Further Bosch pages

Conclusion: Check the wheel magnet and BDU first, then choose the solution.

For many users, the EBTsmart Unlock Key Currently the cleanest main solution, because it requires no additional hardware and is suitable for Bosch Smart System with and without rim magnet is relevant.

The EBTsmart Unlock Key Switch In contrast, this is the right specialized solution if a switch to is deliberately planned. Spoke magnet/sensor logic with an additional tuning sensor is desired. For classic module- or box-based methods, these remain. VOLspeed, SpeedBox and Badass Box 5 interesting.

The decisive factor is always the same order: Smart System Check BES3, check rim magnet, check BDU, check ABS / e-Shift – and only then select the specific product.

All current products for Bosch Smart You can find the system with rim magnet here:
To the complete Bosch wheel magnet collection

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