Old 04-25-18, 09:46 AM
  #5  
Ghrumpy
Senior Member
 
Join Date: Jul 2009
Posts: 788
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 379 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Originally Posted by Slaninar View Post
If RD chain wrap capacity is not sufficient, wouldn't it be safer to go with the optimal chain length and just avoid small-small combo? Cutting the chain too short can cause problems in the big-big combo, like you've said. But running it at optimal length, even while exceeding the RD's chain wrap capacity, can only cause nuisance when (accidentally?) shifting to small-small combo.
The reason to run the chain short is to allow the pulley cage to rotate CCW more for a given chainring, which brings the upper jockey wheel downward, increasing the gap between it and the cogs. This lets you "cheat" the max rear cog rating, but yes, at the expense of making the big-big combo more dangerous.
Ghrumpy is offline