I have a few old electric bicycles: 2 E-ZIP (about 10 years old), EVGLOBAL, and an Extreme Folding XB-310, all of them 24 Volt ebikes. I have been going thru the bicycle components: new Slime Tubes, Slime Tube protectors; truing the wheels; greasing the headtubes, axle bearings; etc. and having...