Mongoose 2075 top tube tri moly bmx frame features a semi integrated headset with rider friendly geometry 25 9t gearing with cassette driver and durable 3 piece tubular cromo 175 mm cranks are attached to an 8 spline spindle with sealed mid bb to keep the rider pedaling withease the rear alloy u brake stops on a 36h alloy rim the mongoose top loader 50 mm stem holds the mongoose 875 bars securely in place mongoose seatseat post combo is a nice comfortable finishing touch