If the home made compressor fails try leaving a tube in overnight. If the tyre's been stored folded up it can take a while for the bead to conform to the rim.
Stretch the tires with tubes. Put some layers of rim tape, two or more. One thing I noticed it makes a lot of difference is soapy water, make sure the rim and tire is well lubed.
If the home made compressor fails try leaving a tube in overnight. If the tyre's been stored folded up it can take a while for the bead to conform to the rim.