The HILAND mountain bike features a sturdy yet light aluminum frame with a performance suspension fork that soaks up bumps and thumps to provide you with a fun, durable riding experience.SHIMANO Shifters and SHIMANO 3x7 drivetrain makes a better configuration than other sbicycles. The brake lever and shifter in one piece is more advanced and scarce than the other split type which gives a better operating experience.The 26/27.5 inch wheels and suspension fork make for a great ride experience on mountain roads, highways, and forestways85% pre-assembled,easy to assemble,free pedals,required assembly tools includedThe 26 inch is suitable for a person 5'2- 5'8 tall. The 27.5/17-inch frame is suitable for a person 5'7"- 6' tall. The 27.5/19-inch frame is suitable for a person 6