Join Date: Aug 2001
Location: upstate New York
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If you are worried about the chain slipping between the rings, thiat is rare, but sometimes does happen. If it does, there are 2 things you can do:
1) Buy a new ring or set of rings that have a "bump-out" further down the ring-this will usually prevent a chain from sliding between them, provided that there is a good amount of teeth difference between the 2 rings, or
2) Buy a Shimano 8-speed chain-they are just a bit wider. I had to do this on my touring bike (rings had a bumpout, but the 2 biggest rings only had a 4 tooth difference, allowing an SRAM chain to slip between-aaarrrgghhh!).
Je vais à vélo, donc je suis!