BTW, pump it up really high as you can (140-150psi), leave it overnight, then deflate to your idea pressure, this help stretch the tyres nicely.
I might try this, the only thing so far that I haven't tried already.
@Fox started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
BTW, pump it up really high as you can (140-150psi), leave it overnight, then deflate to your idea pressure, this help stretch the tyres nicely.