A red Board type Extreme Gear. Knuckles's personal Extreme Gear.
The Red Rock (レッドロック,Reddo rokku?) is a recurring Board type Extreme Gear that appears in the Sonic Riders series. It is Knuckles the Echidna's character board, exclusively to him, meaning only he can use it, and his default Extreme Gear. It is one of the first Extreme Gears available in every game in the Sonic Riders series.
Knuckles doesn't have a lot of patience, especially when it comes to obstacles in his path. On his Red Rock, created by Robotnik, Inc. for Power Type characters, he blazes past competitors and knocks obstructions (including cars) far and wide.
The Red Rock made its first appearance in Sonic Riders, where it was produced by Robotnik Corp.. It is designed as a long and sleek hover board with a thin silver metal footing plate and with a yellow plate with black diagonal stripes, on each side of it
The Red Rock is built to mach Knuckles' powerful fighting style, possessing above average endurance and power, but tend to lack in control.
Tails' bullet-shaped redesign for Knuckles' gear mirrors its owner's own explosive power.
— Game description in Sonic Riders: Zero Gravity.
The Red Rock reappeared in Sonic Riders: Zero Gravity as Knuckles' Extreme Gear. According to its profile, the Red Rock was in this game rebuilt from the ground up by Tails, and has the properties of transforming metal.
In this game the Red Rock recieved a noticable updated in design; it was given an entirely new shape, almost resembling a bone, and made much more sturdy in appearance. It also got a slightly new color scheme, composed of red and white, with green outlines and and a yellow underside.
The Red Rock made another appearance in Sonic Free Riders, along with another new design. In this game, the Red Rock returned to having a board-like shape, but not as long or as thin as it was in Sonic Riders. It was also decorated with white metal accents along the edges. According to its profile, Tails rebuilt the Red Rock with more sturdier materials than any earlier versions of the Red Rock to match Knuckles' tough racing style.
The Red Rock's first appeared in Archie Sonic the Hedgehog Issue 164's second story, "Sonic Riders - Part two", which served as a comic adaption of Sonic Riders. After Sonic returned to Freedom HQ, beaten and bruised by the Babylon Rogues, the hedgehog was at a loss of how to stop this group, who had promised to come to attack Knothole the next day. Tails, however, presented a solution to this problem, by giving themselves their own Extreme Gear, the Red Rock included, so they could face the Rogues on even grounds. Though Tails pointed out that the boards were prototypes, they were all functional.
The next day, Knuckles arrived on the Red Rock outside of Knothole, along with Sonic and Tails on their own Extreme Gear, and managed to intercept the Babylon Rogues with their Extreme Gear. Knuckles then went after Storm the Albatross on the Red Rock, both of them realizing that they have nearly equal strength. Eventually though, the heroes were successful in defeating the Babylon Rogues and driving them off.