This little device can instantly give electric bikes 50% more speed

Electric bikes are subject to various speed limits around the world, but the 25 km / h speed limit in countries like the EU and Australia is especially frustrating for riders looking for something a little more “oomph” in theirs. are bicycles. But a new device makes it easy to increase the top speed of electric bikes without making major changes to the electric bike’s drive system.

Many electric bikes use a magnetic speed sensor on the rear wheel to measure the speed of the electric bike.

When the e-bike reaches a pre-programmed maximum speed – in many countries even 25 km / h or 15.5 mph – the engine power is interrupted and the rider can only reach higher speeds with his own leg strength or with the help of gravity.

The Speedi device causes the speed sensor on the rear wheel to turn more slowly, effectively increasing the electronic speed limit of the e-bike by around 50%. It uses a small gear with a 1: 1.5 ratio to slow down the speed sensor. That would effectively turn an e-bike at 25 km / h into a more exciting ride at 23 km / h.

I’ll let the Speedi people describe the use case in their own words:

You are fed up with hitting your e-bike speed limit when you are Friken gave you the beans ?! Wanna smoke ya pals?

Designed, tested and manufactured in New Zealand, our Speedi uses a mechanical planetary gearbox to increase your standard e-bike speed by 1.5.

A nice feature of this method of “hacking” the top speed of the bike is that other measurements recorded by the drive system, such as torque, power, temperature, etc., are not affected.

It is also not necessary for the user to open or change the engine or the drive system.

Manufacturers are likely to disapprove of the use of the device or even consider it an invalidation of the warranty. So users should probably check with their manufacturer first if they want to be on the safe side.

NLS Components’ Speedi team has already developed units that are compatible with Trek, Specialized, Giant and Santa Cruz bikes. They also offer custom units that may be made compatible with other brands if needed.

The devices cost 160 NZD or around 114 US dollars.

However, traveling at 50% higher speeds – that is priceless.


I know this is going to be a bit controversial, but I understand the desire to go faster than the EU speed limit. Hitting the 25 mph wall is frustrating, especially when non-electric bikes can easily pedal faster.

What worries me more is whether someone in the EU can mount this on a class 3 e-bike or a speed pedelec, effectively turning an e-bike at 28 mph or 45 km / h into a lightweight motorcycle . I’m not sure if many of these e-bikes actually have the power to get 50% more speed beyond the 45 km / h limit, but the 15.5 km / h versions certainly have room for up to 23 km / h.

The additional wear and tear on the drivetrain and components is likely reason enough for a manufacturer to claim the void of warranty, which sounds fair to me. They take into account the intended use of their e-bikes in their entire guarantee planning. So if you rebuild your e-bike to go faster, I think that should be up to you.

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