No Speed limit

Ciyrus 5000

New Member
Hi
I have a rental Akku with 342wh and I can 55 kmh and more with these Akku drive. With my 691wh is just 45 km h. How can that be?

Vg Michel
 

Douglas Ruby

Well-Known Member
The legal limit for speed (Type 3) pedelecs is 45 km/h (28 mph). The battery power (342 Wh vs 691 Wh) gives you a rating of the amount of stored energy (i.e. 691W for an hour), not the power and speed of the motor. The Turbo S has a 500W motor which has an electronic governor causing it to quit assisting once you reach 45 km/h. Your rental must be "delimited" and therefore illegal to be able to assist you above 45 km/h.
 

Ciyrus 5000

New Member
The motor has nothing to do with that is controlled only by the battery. Something is on the small battery unlike the large just what.Specialized can not explain why the well but know not much.
Has a look at the battery looked ever more precise or if software and adapter
 

Douglas Ruby

Well-Known Member
I am sorry, but you are possibly misled. All e-bikes have three major components. A Battery (stored energy), a motor (which converts electrical energy to mechanical motion at some given rate), and a controller (which meters out the energy to the motor under user and factory set parameters, maintains the Li-Ion batteries within safe limits, and monitors motor and battery temperatures).

The battery Wh rating does NOT control speed at all but does affect how far the bike will go at whatever speed the motor will maintain. The Wh rating is a measure of the total stored energy. Think of it as the "size" of a water tank. A larger tank will hold more water. The "Watt" rating of the motor gives a better indication of the power of the motor, and thus the "rate" at which water can be drained from the tank. A 500W motor represents a bigger drain than a 250W motor, but the 691Wh tank is still the same size. The voltage (36V vs. 48V) does have an indirect affect on speed in that for a given DC motor, it will run faster at a higher voltage. Think of a 48V batter as able to exert more "pressure" than a 36V battery. Thus a 324 Wh @ 48V battery (6.75 Amp) might deliver more energy over a much shorter period of time than a 691 Wh @ 36V (19.2 Amp) battery can.

In the case of most of our bicycles, they are regulated to specific top speeds by the controller. The Specialized Turbo (all models) are limited to either 25 kph or 45 kph based on country specific regulations. The Turbo S (500W motor) can get to 45 kph faster than the regular Turbo (200W motor) but they both top out around 45 kph. You are correct in stating that the battery controls the top speed of the Specialized bikes in that the controller that limits this (25 kph vs. 45 kph) is in the battery firmware and can only be changed using the dealer diagnostic.

The Akku bike (I assume is not Specialized) may have entirely different controls. The settings for its top speed (or lack thereof) could be in the motor or in the controller or in the batter.
 
Last edited:

Cory151

Active Member
Looks like the nearest dealer is in China. Not gonna happen. Guess everybody on here is just gonna have to believe your new land speed world record cuz you said so.
 

Ciyrus 5000

New Member
Here a another user :
The Specialized Days 2015 I have also made this experience. Turbo S CE> Small Battery very loosely about 50kmh (downhill even faster) without brake. With original battery (large) was an already slow at 44kmh.
My Turbo S CE decelerates at 44 / 45kmh what really annoys. About 45kmh it's all very hard faster, even downhill.

But the lie, too

Thread can be closed since no one knows what