The bike above is a collaboration between Mercedes-AMG and German bicycle brand Rotwild, a builder that has been around since 1996, according to the company's website. The bicycle in question is the R.S2 "Beast of the Green Hell." It's inspired by the Mercedes-AMG GT R sports car that was promoted with the same nickname. It uses a carbon frame and wheels, as well as disc brakes. It's also painted in green and black to match the Green Hell Magno color available on the GT R. Only 50 of them will be built, and each will carry a pricetag of over €7,000, or nearly $8,300 at current exchange rates, including tax.
The second bicycle is from Aston Martin and another German bicycle company, this one called Storck Bicycles. This bike company has also only been around since 1995. The bike is called the Fascenario.3 Aston Martin Edition, and it will be a bit less rare than the Mercedes bicycle, with 107 total units. It's still a cool vehicle, though, featuring a carbon frame and wireless shifters. In total it weighs 13 pounds. It does lack the disc brakes of the Mercedes bicycle, though. Pricing hasn't been announced for the Aston Martin bike, but don't expect it to be cheap.