Old 07-12-18, 07:50 AM
  #19  
Kovkov
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Bikes: 1957 Alpa Special, 1963 Condor Delta, 1967 Tigra Sprint, 1977 Oltenia, 1987 Mondia, 1965 Staco de luxe, 1969 Amberg

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I would proceed with substitution principle:

1. We can take Your GF's friend and Your GF's dog out of the equation.
2. Try another tube brand/type
3. Try another tire brand/type
4. Try another rim brand/type
5. Try another GF
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