Originally Posted by
dddd
Starting in 1979, the inexpensive U08/9/10 models had a completely new frame and fork, still having lugs but made from a better "103" Carbolite tubing.
snip . . .
What is the difference between "103" carbolite tubing and the tubing used on the older UO8s/UE8s/UO9s/UO10s? I thought this was just a change in the sticker but that all of these bikes had fairly similar hi tensile steel frames.