Moving from standard 18" to 23" tires provides an "instant" mechanical speed increase of 2–4 mph. How to Increase Your Golf Cart Speed - Gear Upgrade Install
Swapping to an 8:1 gear set can increase a cart's top speed by approximately 5–8 mph . Common Upgrades for Performance
This refers to the gear set (input shaft and gears) inside the transaxle.
Essential for protecting 12V accessories (lights, radios) when running on higher-voltage 36V or 48V packs.