Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 586 Post(s)
I doubt that the added link made enough difference in the RD idler tension to be a factor, but you should double check that your chain isn't too long by shifting to the small/small combination and seeing that the RD takes up all the slack.
Otherwise You're probably attuned to any difference and the chainslap is the same. With the chain on smaller sprockets the top loop is so close to the chainstay that chainslap is unavoidable. You can't solve it so use a decent chainstay protector either DIY or bought. If you don't like the noise, foamed neoprene like what's used to insulate pipes does a great job muffling it.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance