Gravity Point

Gravity Points (GP) is a special type of fuel used by Extreme Gear and is only used in Sonic Riders: Zero Gravity. This fuel entirely replaces Air that was used in Sonic Riders and Sonic Free Riders and is a fundamental part of the gameplay during a race.

Description
Gravity Points allow a racer during a race to perform Gravity Actions such as Gravity Control to steer through sharp corners and be able to continue racing at high speeds (sometimes referred to as Gravity Drift), accessing different routes (both high areas and along the walls (called "Wall Routes") and Gravity Dive, which sends the racer flying through the air at high-speeds. All of these actions consume Gravity Points (which is displayed on the GP guage at the bottom right-corner of the screen. Once the racer's GP Guage depletes, the player can no longer use Gravity Dive and if the racer attempts to use Gravity Control, he/she will simply fall drop down to the ground.

Like with Air, there are numerous ways to replenish Gravity Points. These include the following:
 * Running start. Depending on how close when the racer passes through the starting line will net the player GP
 * Performing Air Tricks. The amount of GP received varies on the rank of the trick; the higher the rank, the more GP earned.
 * Skill Actions (Grinding on grind sections, air-riding and smashing through obstacles)
 * Performing a Meteor Burst (colliding with an object) while using Gravity Dive.
 * Some Item Boxes can also contain GP items that replenish the GP Guage. They can come in 30, 50 or even 100.
 * When accessing "Wall-Routes" with Gravity Control, the player will earn 30 GP.

Different Extreme Gear have different GP accumulation rates, which means that some Extreme Gear will earn less Gravity Points than others when performing the same actions. In a normal race, the player can adjust the options to have a low, normal or high GP accumulation. Note that if that setting is low, some Extreme Gear will not be able to accumulate Extreme Gear with performing Air Tricks, regardless of rank.

Besides this, some Extreme Gear also have the special ability to replenish GP through unusual methods such as the G Shot, which its rider can replenish some GP for each obstacle destroyed while using Gravity Control. In addition to replenishing Gravity Points, some a Gear Part known as "GP Gauge UP" can increase the capacity of the GP Gauge itself, allowing it to hold more GP Gauge and in turn, allowing the player to perform Gravity Actions more frequently.