At only 62 grams, this super-light Ninja pump hides inside your seatpost to keep the clean lines of your bike, while still easily accessed when needed. Its rubber mounting ring secures the pump and the included position indicators keep track of your seat height.CNC aluminium barrel and handlePresta valve compatible head with integrated dust ring Fits into ├©27.2, ├©30.9 or ├©31.6mm round seatposts Inflates tyres to 160psi20.3x2.1x2.1cm 62g