Originally Posted by
Andrew R Stewart
Chain width of both 7.1mm and 7.3mm are claimed to be 8,7,6 speed specs. But .1mm (from center of the cog/chain fit up) is a very small dimension. I wonder if worn parts (pulley bushings, index detents, der pivots, cable route friction) are the larger issues at play. BTW Uniglide cogs are a bit wide, in function, as the Twist Tooth design takes up space and has sharp tooth tips at the edges of the cog width dimension. There's a reason that HG tooth profiles are narrowed at the tooth tops. Andy
Brand new cogs, shifters, cables (jagwire teflon), etc. I can see the chain slightly catch the cog when it's set so that the indexing works perfectly going either up or down. Maybe I'm expecting too much from NOS components? I was hoping to make at least 1 bike never to need slight 'overshifting' when going to the larger cogs....
Well, maybe the 9-speed chain is the way to go....