Designed for fat and semi fat tyre bikes the big bore packs massive volume per stroke and a unique head that still works with winter gloves onoversized press on schrader and presta head won39t accidentally remove valve cores and can be easily used with thick glovesflexible hose attachment allows for aggressive pumping without fear of damaging valve stemsinverted barrel design allows for high volume in a compact sizecoarse machined aluminium barrel for extra gripwater bottle boss mount wit