Pale grey is used for Sideways' hands and windshield chest panels.
Dark grey is used for Sideways' upper legs & handlebars.
Black is used for Sideways' wheels and upper arms.
His missiles and windshield are moulded in clear plastic.
Nice Bike - better than the 2 BM efforts for sure. Odd transform - the seat becomes the feet, and the back the legs. The windshield flips round and the head raises. The exhausts fold via a series of panels to peg into the windshield at the shoulders - had a little trouble with this first out and the wheels fold behind the back. 2 missile launchers - one on each arm, both ball type and activated by a minicon. Decent enough range of a meter or so but they're a bit awkward to fire ! Crosswise & Rook are his 2 minicons which can either ride the bike pinion with each other or combine to form a rider that's a head shorter than TF:A Perceptor. When Sideways is in robot mode they can attach to the body to form a new head and reveal either an Autobot or a Decepticon symbol. The cartoon has him down as Con, but his instructions are painted as Autobot Red.
When Sideways is in robot mode each Minicon can combine with him: Point their arms straight up, spread the legs out to the sides and fold the lower legs down. Turn the Minicon upside down, place their head into the top of Sideway's head and push down lowering Sideway's original head and their arms into Sideway's body and raising a panel within the wind shield on Sideways chest revealing the allegiance associated with the head (Crosswise is a Decepticon with purple markings and Rook an Autobot with red markings). In theory. Several early versions of the toy had the wrong Minicon activating the wrong symbol. Confusing ! Even now I look at these and reckon Crosswise looks a better Autobot and Rook a better Decepticon.
Purple becomes yellow, pale grey becomes much darker grey (nearly black), dark grey becomes purple and black stays the same.
Rapid Run and his Minicons had a very limited release in the US being quickly replaced by Energon Starscream (Treadbolt and Ultra Magnus were likewise limited release repaints of Armada toys). In the UK however Rapid Run & co were available for all of Energon wave 1 alongside Inferno and Hotshot with Starscream being a wave two toy. See various Energon reviews for discussions about UK Energon cases !