Originally Posted by
nuclear90
I'm using a frame style pump. I can hear a slight hissing sound coming from the tire.
What type of tube do I need to buy?
Tubes are sold in ranges that match the sidewall information. You'll want a tube for 559 (26") tires, that has the same stem, likely in a 1.5-2.0 size. Buy a patch kit just in case your old tube just needs a patch. You can use it as a backup tube.
Regardless, try and find the hole in the tube, and check the corresponding location in the rim and tire for the cause of the hole. Putting on a new tube on will result in a new hole if you don't correct the cause.