Dahon Mariner D7 Folding Bike 2015, Review.The rust-resistant Mariner provides specifically for boaters, flaps easy to fit into the smallest boat stops, but it works equally well for everyone who has a rounded folding bike. Transportation is a breeze with this bike that folds in less than 15 seconds. It is also light enough to travel by public transport. It may not cost as much as some other bikes, but thanks to the components such as a Dahon Neos rear derailleur it leads to a high level. Apart from the fast and efficient switching the bike is also available for a convenient low-profile design that protects against damage. Another plus point is its 7005 aluminum frame.