some may recall my request for advice on a chain that was skipping, despite the fact it had only 500 miles of use. with the board's indulgence, i'd like to refresh this issue with things i have learned and a couple of questions that have arisen.
first, the chain is NOT worn out. far from it. 12 links measure almost precisely 12 inches. the chain has many miles of life left. likewise the cogs and chainwheels.
second, i had removed the chain the week before it started skipping, and when i had reinstalled it the pin was not pressed far enough into the chain, allowing it to develop a gap between the plates. it was this gap, when it rolled across the cogs. that allowed the chain to skip. it's amazing the chain held together it all. when i discovered the damaged link it was just barely hanging in there. so i removed that section of chain and reinstalled it, taking great pains to ensure the pin was pressed in precisely right this time.
which brings me to my question: it's now my understanding, based on sheldon brown's web site, that modern chains are not designed to be parted. the pins are pressed in much more tightly than they were in years past, and pressing out a pin to remove it makes that link weaker. this was certainly not the case in my days as a racer, some 15 years ago, when we routinely removed and cleaned chains.
can someone comment on this? should i just clean the chain in place from now on? or is it still possible to safely remove and reinstall it once/month to maximize chain life? (i commute 120-150 miles/week).
thanks in advance.