These will add an increased amount of strength to the mid section of the bike- and stronger is always better! This bike features a 19.5 inch Top Tube which is perfect for the shorter rider - providing a shorter reach and additional responsiveness. The bike has been constructed from lightweight Hi-Tensile steel which helps with manoeuvrability. Relevant geometry makes this bike handle just like the pros bikes and a Sealed Bottom Bracket adds extra protection for your bearings! Good times are sure to be had on this beast!