My FMBs distorted horribly. They saw a lot of wet riding. Some With road salt in the mix. Plus they were on the bike for ages as my off
Its too late but you need to cover their sidewalls with latex-- the light foam from some latex milk-- or Aquaseal if you plan to expose them to rain. Cotton is not as prone to water problems as silk but still have the tendency to distort and rot. Road salt is just adding to the problems-- and these days its not just road salt but a mix of salt and sharp little stones..
Continental and some other tyres that use nylon instead of cotton or silk are a bit better with rain but I've still managed to rot my share of Continental Sprinters and Competitions over the past 20+ years.
Its too late but you need to cover their sidewalls with latex-- the light foam from some latex milk-- or Aquaseal if you plan to expose them to rain. Cotton is not as prone to water problems as silk but still have the tendency to distort and rot. Road salt is just adding to the problems-- and these days its not just road salt but a mix of salt and sharp little stones..
Continental and some other tyres that use nylon instead of cotton or silk are a bit better with rain but I've still managed to rot my share of Continental Sprinters and Competitions over the past 20+ years.