Originally Posted by
bluefoxicy
I only have a small pump that weighs 114 grams stuck to the side of my bike, and it only has one head and an adapter.
The problem turned out to be the nut on the valve. When I deflated it, the tube shrank and retracted the valve into the bike; but the lock nut prevented that, and so the tube got a huge tear around where the valve connects. Bike mechanic found it and explained to me how to deflate a tube properly...
proper way to deflat tahr - unscrew head, press head, tahr goes weeeesssssshhhhhh.....
hand pumps can be problematic - can't be yankin them around like you;re twistin the head off a chicken...
best way to use hand pump:
spin wheel so valve is at top, thumb on tire behind valve as you push pumphead onto valve
cradle pump head in left hand (iff'n youz pump righty), bring the left thumb over the top of the tahr - this stabilizes the pump/valve so it don;t be wigglin around and tearin; make sure head and valve are pointin straight towards rim hole - have at it...
don't be wigglin the pump to get it off neither
wheel/valve/pump still at top
hold pump by handle, makin sure its all still properly aligned.
sharp rap with the side of the other hand to the pump right next to wheel/rim, pump pops off, screw valve shut.
discard little valve rim screw thingie - or turn into industrial art
gotta be Youtube on this somehwere...