Originally Posted by
banjo_mole
So... Is that good or bad or mediocre tubing?
Strong enough for touring, or more race-y?
It's great tubing; gauged for competition use. There were heavier sets ("ST" or "Special Tourist") and lighter sets ("Special Lightweight") as well. These were always available from Reynolds, but it wasn't until the late 70s that distinguishing decals were provided. Until that point (and in many cases, even after that point) generic "531" decals were used.