The SUPER73® S-Series

Super 73 SG and SG1 comparison table

What's the difference between hydraulic and mechanical disc brakes? 

The major difference between hydraulic disk brakes and mechanical disc brakes is that the latter uses a cable that is similar to a derailleur cable, while the former uses brake fluid like the one used in cars. 

As previously mentioned, mechanical brakes make use of a cable in order to brake and just like a derailleur cable, dirt can affect their performance and they can also get stretched out. These brakes also don’t stop as well as hydraulic brakes, however, they are easier to adjust because it is just a simple cable. So if you like adjusting your brakes on the fly and want it to be done easily, mechanical brakes offer easy adjustments. Moreover, mechanical disc brakes are more common and cheaper to replace. 

Hydraulic brakes are designed to use brake fluid, which becomes compressed when the brake lever is squeezed and this is simply what makes the brakes to function. This is a superb technique that offers more reliable and stronger braking performance. However, the technique will cost you more than the brakes themselves. For example, you will have to make ensure that the brake lines are air free, and also maintain care for the brake fluid in case their performance starts to suffer.

And, just like with brakes of your car, you will have to change the fluid at times but the good thing is this will definitely be rare. Taking into mind that these brakes are in an enclosed system you definitely don’t need to worry about mud and dirt affecting the performance of your bike, unless you end up getting the pads dirty and that is the same case with mechanical brakes.

Hydraulic Brakes Pros and Cons:


  • Excellent modulation
  • Unsurpassed stopping power
  • Open Systems with huge rotors capable of handling very high loads of heat from “heavy-duty” riders


  • More expensive
  • Closed systems can blow off or lock-up or blow-off hydraulic seals/lines if overheated

What's so cool about the Tektro brand? 

Tektro is a popular and well established bike component manufacturer. You can benefit from Tektro's own manufacturer warranty if you need replacements parts. Just contact them directly by finding a local dealer through their website. 

What is the difference between a 2A and a 5A charger? 

In simple terms, a 5A charger will charge your battery faster than a 2A charger. The 5 amp (A) charger allows more current to pass to charge the battery. You can use the 2A charger on any battery but the S1 models all come with a 5A charger. 

What is Pedal Assist?

Pedal Assist automatically turns on the motor when you pedal. With pedal assist you do not need to use a throttle to control the motor.

There are two types of Pedal Assist: Cadence Sensor Type which measures IF you are pedaling and a Torque Sensor Type which measures HOW HARD you are pedaling. The Super 73 S-Series sold in the United States with thumb throttles, as well as the Super 73 SG (Global) has a cadence sensor. The Super 73 SG1, sold outside North America, and doesn't come with a throttle, has a torque sensor. 

1. Cadence Sensors

The basic cadence sensor uses a magnet on the crank, it turns the motor ON when you start pedaling and turns it OFF when you stop pedaling. It works more or less like a switch. You control the boost level and speed by adjusting the assist mode manually up and down. 
The advantage is that it's an inexpensive way to get some sort of pedal assist onto the bike, but the disadvantage is that the pedal assistance can feel jerky, laggy and counterintuitive. Also if you want to pedal faster than the motor is spinning, the motor will actively work against your efforts. The Super 73 has this type of sensor as it is most often used with the throttle only.

2. Torque Sensors

The torque sensor is a totally different technology that uses a precision strain gauge. It measures your actual force on the pedal, sampling at 1,000 times per second over the entire pedal stroke.

The harder you pedal, the more power it gives to the motor. If you pedal lighter, less power goes to the motor. It makes this adjustment in real time so it is technically amplifying your every input. It feels like you are bionic.

Most all higher-end e-bikes use torque sensors and in some countries, cadence-only sensors are not allowed to be sold. The disadvantage is the cost is significantly higher to implement this technology as the precision component is relatively more expensive.

Which model is best for my needs? 

If you are going to be climbing a lot of hills and using your Super 73 on a daily basis, for commuting over 20-30 miles we recommend the S1. If you plan on cruising over short distances, in cities or small towns, on flat surfaces and don't need that much power, we recommend the S model. 

Need more info?

Check out this video that compares the Original Super 73 model with the S and S1 "Rose Ave."