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Just bought a KMC 1/2" x 1/8" chain(4 posts)

Just bought a KMC 1/2" x 1/8" chainB2
May 18, 2003 11:44 AM
along with a half link so I can get more gearing combinations without having to use a chain tensioner.

I have a couple of questions:

1. (Start with the really dumb one first) Is this the correct size chain if I'm using Shimano IG chain ring and a Shimano BMX cog?

2. The pins on the chain appear to be mushroomed on the ends. Can I safely push a pin partially out and then push it back in to shorten the chain? I'm concerned that the hole in the outer plate will become deformed when I push the pin through it.

re: Just bought a KMC 1/2" x 1/8" chainTrevo
May 18, 2003 2:31 PM
Yeah your chainring should work. The only times youll run into problems is if its 9 speed specific stuff.

I dont know what your describing about your chain pins.

What model of chain did your get?

Got the 410HB2
May 18, 2003 6:20 PM
It's pretty massive compared to the 9 speed chains I'm used to seeing.

Since I will be using the 1/2 link, I'll need to use a chain tool to push one of the pins out so I can insert the 1/2 link. I'll then need to push it back in to reconnect. My concern is that the end of the pin is buldged out to larger diameter compared to the rest of the pin. When this larger diameter portion of the pin is pushed through the outer plate, the hole in the plate could become enlarged. This is a problem with Campy 10 speed chains, theoritically weakening the connection, hence the requirement for special pins and tools.

Sounds like there's no problem doing the old fashioned way; push the pin out, pull the link apart, put the correct link back in and then push the pin back in again.

re: Just bought a KMC 1/2" x 1/8" chaineddie m
May 18, 2003 4:58 PM
That should work fine. The rivets on all chains are peened at least a little. The only chains that create problems are the super narrow 9s and 10s cahins, which are hard to join (because of the short rivets) and subject to side stresses during shifting. If your new chain came with a connector link, use that. Otherwise just use an ordinary pin vise to connect it.