A pulley is a simple machine using a wheel and a cord that's designed for lifting.

Pulley systems ease lifting with ropes over wheels. Single pulleys change force direction; fixed pulleys change direction; movable pulleys reduce effort. Adding pulleys creates mechanical advantage.

Calculating Pulley RPM Calculating a pulley's rpm can be very handy when it comes to optimizing an accessory system or sorting out problems.

Which pulley system is best? Gym memberships can be expensive, but that’s a poor excuse for not doing your best to stay in shape. If you can’t afford the luxury of having a monthly membership ...

We add some style to a bland looking Chevy Performance LS3 by installing a S-Drive pulley system from Eddie Motorsports.

Some companies offer bracket kits to work with the GM pulley systems and mount a Sanden A/C compressor high on the passenger side, but that doesn’t address the GM system’s lack of good looks.