The topeak joe blow ace dx pump the joeblow ace dx takes the efficient 3 stage dual barrel technology of the original ace and combines it with the sleek smarthead dx1 connector and larger easier to read gauge to set a new standard in pump design topeak joe blow ace dx pump features anodised aluminium barrel oversized handle stable aluminium and rubber base smartheadtrade dx1 head air bleed button for precise pressure setting head lsquodockrsquo holds hose easily inflates