Originally Posted by
nuclear90
The tires themselves look fine visually. I gave the chain a good greasing yesterday.
All I've got at my disposal is a small hand pump and it feels like the tires aren't taking on air anymore but only reading out at 15 psi on a tire gauge.
"Small hand pump" isn't descriptive enough. Do you have a floor pump, or a frame-style pump?
Floor pump
Frame type pump
Frame pumps don't move as much air as floor pumps. Larger tires also take more air. If you're confident that you have a leak, you'll need a patch or a new tube.