12V Straight DC Motors with no gearing.
These are basic DC motors, simply as the title says. These are a directly DC motor without gearbox whatsoever.
We offer these simple motors in assorted power 12v Motor ranges at 12VDC motors which are appropriate for our range of DC Speed controllers.
With no gearing, these universal motors are created for scooters or e-bikes using belts and chains (with varying size sprockets) to create high torque or medium torque with higher speeds!
While primarily created for scooter or go-kart use, these are a popular range for hobbyists and inventors.
While these are low cost motors, there is nothing cheap about the quality. They are simply motors that are created in such large quantities that they can be produced with a minimal price point.
The are manufactured in mass, so while its expensive to get 
adjustments made (quantity must be purchased) the stock motor is low priced due to its availability and widespread use.