Description This is the very latest Volspeed Version 2 for Bosch Rim Magnet - Part Number: 1405 - Released March 2nd 2026 The module removes the 25 km/h speed restriction and allows speeds of up to 45 km/h (28 mph). Compatible with the latest Bosch Drive Unit firmware version 19.54.0 that was released on May 4, 2026 as part of the major Performance Update 2.0 for the Bosch eBike Smart System. Compatible with e-bikes equipped with a Bosch Performance Line CX motor and a rim magnet. Important: This tuning only works with bikes that have a rim magnet. Models without a rim magnet are not supported. If you're unsure, use our configurator to select the right tuning module for your e-bike. Your Benefits Uses the original rim magnet—no additional speed sensor required. Easy installation with a wire clamp directly on the motor. Invisible after installation. Supports Performance Line CX Gen4 (BDU37xx) and Gen5 (BDU38xx). Automatic calibration, ready for immediate use after installation. Controlled via the bike's control unit —no smartphone required. Features Can be conveniently turned on/off using the buttons on the control unit. Adjustable speed limit between 25–45 km/h. The last setting is saved. Tuning is always deactivated when the bike is turned on. Option to enable a "softer speed limit behavior" (Dynamic Mode), significantly smoothing out the otherwise abrupt cut-off at the speed limit. Important Notes Installing this module requires removing the motor. Specialized knowledge is necessary. If you lack expertise, have the tuning installed by a specialist. The tuning is mounted at a predefined location on the motor. Some bike models may not have enough space, making installation impossible. You can find a list of known incompatible e-bike models here. This list is updated regularly. With tuning activated, the speed displayed above 21 km/h and the distance measured will be lower than actual. The odometer will show a reduced mileage after using the tuning. Technical Specifications Housing dimensions: 48mm × 48mm × 6mm Cable length: ~140mm Weight: 0.021kg Power consumption: 0.3W Supply voltage: 12VDC WEEE Reg. No.: DE35476192 Scope of Supply Tuning module English installation and user manual 2 mounting clips 2 cable ties Rim Magnet Chip Installation Guide Gen 4 Bosch Rim Magnet Chip Installation Guide Gen 5 Bosch