OEM what does it mean.

I keep seeing OEM on sites like crc and need to know what this means as i would like to buy some stuff but I dont want tat.thanks in advance for your replies guys.5xcri know i should know this but cant put my finger on it

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Whoever thought to add an electric motor to a bicycle deserves a prize for such an innovation. Electric bikes are a popular commuter tool and way for anyone to get outside into fresh air. While these bikes overcome many of the problems inherent with standard bikes, especially people tiring too soon, they do come with the problem of having to navigate the terms used for their electric components to make the best selection.

If you want to purchase an electric bike of your own, you need to understand wattage, voltage and amp-hours and what they mean for your ride to make the best decision for your lifestyle. Here, you will find electric bikes explained with the definitions and more about their operation.

How Does an Electric Bike Work?

Electric bikes use a motor to assist the movement of the pedals, making riding the bicycle less taxing. Some designs allow the bike to move forward under its own power from the motor while electric pedal bikes require some assistance.

Don't confuse electric bicycles with motorcycles. The electric motor and battery don't last as long as a gasoline-powered engine. However, e-bikes are better for the planet because they do not generate polluting exhaust when you ride them. They also are a healthier option for you because you will have to use your power to move the bike, which will improve your cardiovascular fitness.

While you might think electric bikes don't have an upper limit for their speed, thanks to the addition of a motor, they do. Because federal regulations under the Consumer Product Safety Act regulate the definition of low-speed electric bikes, you will have a speed limit for how fast you can go with motor assistance. Depending on the bike you have, you may have a speed limit of 20 to 28 miles per hour (mph).

E-bikes have three classes in states that define what an electric bicycle is. Check with your state laws because some places regulate the operation of certain e-bike classes to specific age groups.

Class 1: These bikes assist the rider while they pedal at speeds up to 20 mph.
Class 2: These bicycles may use a motor only to propel the bike up to speeds of 20 mph.
Class 3: The fastest bikes only provide motorized assistance when the rider pedals, up to 28 mph.
Electric bikes have three main components that set them apart from standard bicycles - the battery, the motor with its controller and the sensor.

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1. The Battery
How an Electric Bike Battery Works

The battery powers the motor. This device's capability for generating power and how long it lasts are where the numbers for wattage, voltage and amp-hours come into play. To keep these weighty parts of the bike from upsetting your balance, they have a position low and centered on the bicycle.

While bike batteries have shrunk in size and increased in power since converting from lead-acid to lithium cores, they still contribute a significant amount of weight to your bike.

2. The Sensor
To prevent electric bikes from going too fast, they have sensors that monitor your speed to determine when to instruct the motor to turn the throttle or pedal assist on or off. The sensors may measure speed or torque. Both act in similar ways, though. The speed sensor watches how fast you travel. A torque sensor, however, monitors how hard you pedal, as harder pedaling correlates to faster speeds.

3. How Electric Bike Motors Work
Electric bikes use a motor to boost your ability to ride. If you tire out while riding an e-bike, you can use the throttle to help you move. Pedal-assist also kick in while you pedal the bike, allowing you to use less effort. As soon as you stop pedaling or go over the preset speed limit of the bike, though, the pedal-assist stops.

The motor changes electric power into mechanical work that it uses to help turn the bicycle's wheels. Manufacturers have three positions for placing the motor - the front hub, rear hub and in the center of the bike. Motors placed on the front hub have become less popular today than those installed in other locations on the bike. You will typically find these front-installed motors on low-end e-bikes.

Rear-hub motors drive the bike from the rear wheel and integrate with the bicycle gears. The motor in this position improves traction and handling thanks to its connection to the gearing. With better control, rear hub motors often appear on mid-class e-bikes.

Premium, and very expensive, electric bikes have their motors near the center of gravity and attached to the frame. This motor position does not prevent you from quickly changing tires on your bike while making the bike stable.

E-bikes are typically made with electronic components that have secure coverings with tight seals to prevent damage from light rain. They can withstand a variety of climates, but it's important to use common sense and avoid overexposing an e-bike to significant water and/or rain.

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