Now in its second generation, the Cascade 4 borrows much of its technology from the highly popular Polygon Premier series from last year and delivers a truly capable all rounder - whether you want to explore your local parks and trails or use as a reliable commuter around town. Utilizing a new lighter frame , the Cascade 4 is now one of the lightest mountain bikes in its category on the market. The aluminum frame is combined with reliable and durable components , which compared to other brands in the same price point makes the Polygon Cascade 4 the clear bike of choice. With the 27.5 wheels, the bike is not only an efficient commuter but can comfortably handle itself on mountain bike tracks and the front Suntour XCE fork validates the claim. The rear Shimano Tourney rear derailleur has been improved for this year, now capable of handling the 8-Speed cassette .