E-bike accessories and bike electronics spares

Electronic bike accessories keep everything that lights up, recharges or connects working for longer: e-bike battery mounts, cables and chargers, batteries for bike computers and sensors, display and GPS mounts, anti-theft trackers and indoor trainer accessories. Note the brand and model of your system: most of these parts are specific to it.

E-bikes: battery, cables and charger

An e-bike battery sits on a pannier rack rail, on a plate fixed to the down tube or inside the frame, with a lock that secures it. These mounts, like the cables that connect the motor, display and charging port, are specific to each system, Shimano Steps, Bosch, Yamaha or Mahle, and often to each generation. To recharge, use the charger or adapter specified by the manufacturer. Complete batteries have their own page, e-bike batteries.

The law sets limits for these bikes, and they differ from country to country: in the UK, an electrically assisted pedal cycle has a motor of no more than 250 W that stops assisting above 15.5 mph; in the European Union, and therefore in Ireland, the motor is limited to 250 W and the assistance cuts out before 25 km/h; in the United States, the federal definition allows a motor of under 750 W and a top speed of under 20 mph on the motor alone. No accessory should be used to exceed these limits.

Batteries, mounts, trackers: the electronics on board

Speed and cadence sensors, heart rate straps, remotes and some displays run on coin cell batteries, the CR2032 being the most common; lights and more power-hungry devices take AA or AAA batteries. Mounts put your bike computer or display right in front of you, and GPS trackers help you find a stolen bike. For the device itself, see bike computers and GPS, GPS watches or bike lights.

Indoor trainers: accessories for training at home

Floor mats, front wheel risers, tablet holders, power cables and spare parts equip your training corner, alongside a few virtual reality headsets. For everything else, browse bike electronics.

Which electronic accessory brands should you choose?

Mahle, a German automotive supplier that also produces e-bike motors, supplies the cables, charger and battery mount for its X35, XS and eX1 systems.

Wahoo pairs its Elemnt Ace, Roam and Bolt computers with aero mounts, and its KICKR indoor trainers with a mat and a power cable.

Shimano offers integrated or rack-mounted battery mounts for its Steps systems, its charging adapters and the SM-PCE02 interface that connects an electronic system to a computer.

Elite completes its indoor trainers with the Posa 2, a stand for a tablet or laptop.

Look supplies the charging cable for its Blade power meter pedals, as well as its ADS and ADH computer mounts.

Electronic accessories on sale

An accessory from a replaced generation moves to the electronics outlet; the latest arrivals fill the new arrivals. Black Friday is a good time to buy a mount or a pack of spare batteries.

Frequently asked questions

Which battery for a bike computer or sensor?

The reference is printed on the original battery or in the instructions, often under the cover of the battery compartment. The CR2032 is used in many sensors and remotes; computers with a built-in battery recharge by cable.

Can you charge your e-bike battery with another charger?

No. Voltage, connectors and charge management are specific to each system: an unsuitable charger can damage the battery. Use the manufacturer's charger or a model it declares compatible.

Is it legal to derestrict an e-bike?

No accessory should be used to do so. In the UK, an e-bike whose motor assists above 15.5 mph or exceeds 250 W is classed as a motorcycle or moped: it must then be registered, taxed and insured, and ridden with a driving licence. Elsewhere, check the rules that apply where you ride.

The battery moves in its housing: what should you do?

Check that it is properly clicked in and locked, then inspect the condition of the rail, the lock and the contacts. A worn mount is replaced with the original part for the system.