String gauge affects playability, tone, and tension. Lighter gauges are easier to play and suit faster styles, while heavier gauges deliver more volume and sustain. Most electric bass players start with a medium set (45–105) and adjust from there based on tuning and playing feel.
Scale length determines string tension and intonation. Standard long scale is 34"; medium scale is 32"; short scale is 30". Always match your strings to your bass's scale length for correct intonation and optimal tension.
The winding type shapes tone and feel more than any other variable. Roundwounds are bright and articulate. Flatwounds are smooth, warm, and sustain-rich. Half-rounds and groundwounds sit between the two extremes.