# Design Fundamentals

- [Gear Ratios](/hardware/design-fundamentals/gear-ratios.md): Gear ratios are one of the most common design decisions that a team must master in order to optimize mechanical advantage in their designs.
- [Internal Forces (Stress)](/hardware/design-fundamentals/internal-forces-stress.md)
- [Torque](/hardware/design-fundamentals/torque.md)
- [RPM](/hardware/design-fundamentals/rpm.md)
- [Center of Mass](/hardware/design-fundamentals/center-of-mass.md)