Trek Navigator 3.0 Mountain Bike aluminum frame size Small / Medium ( 14.5" ) good for someone 5ft to 5ft 5in.Bike has Shimano Alivio 24 speed and Sram grip shifters ,calliper brakes , front shock with lockout , seat shock for comfort , quick disconnects , bike stand ,bell , Bontrager 26 X 1.95 hard case triple puncture protection tires .This is a very good quality bike in brand new condition.This is a bike that will last for many years trouble free and good for road and trail riding.