For the technique of riding on Grind Rails, see Grinding.

Quotation1 Enables the use of the Grind skill. Quotation2
— Description, Sonic Free Riders

Grind Skill, also known as Grind, is a Gear Part that appears in Sonic Riders: Zero Gravity and Sonic Free Riders. It is an Extreme Gear component that grants the Extreme Gear riders the ability to grind.


Grind Skill is an installable performance-enhancing component for Extreme Gears. Its actual appearance is unknown, though it is presented as an icon on the head-up display in the top-left corner of the game screen. In gameplay, the player can activate Grind Skill under special circumstances, which allows the player to grind on the Grind Rails/Grind Areas on the racing courses while receiving Air/Gravity Points for it.

Game appearances

Sonic Riders: Zero Gravity

The Gear Part first appeared in Sonic Riders: Zero Gravity under the name Grind. In this game, its icon is a light blue-colored circle with a thick curved black line, which has a small spark at the start, inscribed in it. Here, Grind is a Gear Part permanently installed into only certain Extreme Gears.

In gameplay, Grind and its ability will be disabled when starting a new race. To activate Grind, the player must press one of the following buttons after collecting a certain number of Rings:

PS2 Wii (remote) - sideways Wii (remote) - forward Wii (Nintendo GameCube Controller)
PSTriangleButton WiiDSA Up on Controlpadds Gamecube Y Button

With Grind active, the player can access Grind Areas by pressing one of the following buttons when approaching the beginning of them:

PS2 Wii (remote) - forward Wii (remote) - sideways Wii (Nintendo GameCube Controller)
PSXButton WiiDSA Snnwii2buttondisco A Button GameCube v2

When activating Grind, the player's Rings will be reduced accordingly by the number needed to enable it and the Extreme Gear is surrounded by an orange void, indicating that the Gear Part coming into effect. The following Extreme Gears come equipped with the Grind:

Name Activation requirements
Black Shot 50 Rings
Blue Star 50 Rings
Faster 50 Rings
Fastest 50 Rings
Flame Lance 50 Rings
G Shot 50 Rings
Hyperdrive 50 Rings
Light Board 50 Rings
Omnitempus 20 Rings
Pink Rose 50 Rings
Rainbow 40 Rings
Rhythm Machine 50 Rings
Type-J 50 Rings
Shooting Star 50 Rings
Turbo Star 50 Rings

Sonic Free Riders

Grind Skill close up

A close-up of Amy riding the Pink Rose with Grind Skill active.

The Gear Part reappeared in Sonic Free Riders where it is named Grind Skill. In this game, its icon is almost the same as it was in Sonic Riders: Zero Gravity, except its background is a darker blue, the curved line is colored a lighter blue and there is no spark. Here, Grind Skill is a customizable Gear Part that can be attached to different Extreme Gears. It is one of the Gear Parts that can be used from the beginning of the game.

If Grind Skill is installed into the front slot, it becomes active in gameplay once the race begins. If installed into the rear slot, however, the player can activate, and as well deactivate, Grind Skill by switching stance by turning his/her body around due to the Kinect controls of the game. While Grind Skill is in effect, the player can access Grind Rails by either crossing over them, jumping on, or by successfully performing a mid-air Trick Action. Also, when Grind Skill is active, two small and thin blue engines appear on both sides of the Extreme Gear.

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