Joined: Jan 2010
Posts: 9,834
Likes: 1,811
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
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.
The geometry was also completely reworked, with a much steeper seat tube angle, shorter chainstays and a bit slacker headtube angle.
The end result was a frameset that really worked well for more spirited riding versus the older U0-* frames.
The PKN-10 was a very nice midrange bike, much lighter than even the UO-10 model having alloy cranks and rims. It still used seamed tubing for the fork legs though.