Changing SRAM x7 to tighter ratios

[eigpjv]

(04-13-2012, 06:23 PM)barefooter Wrote:  Did you shorten the chain when you installed the cassette? If your chain is too long the jockey wheel cage cannot keep the chain tensioned enough for good shifting.

Until I got my second bicycle, I used 2 wheel sets on my mountain bike one with a 30-11 and one with a 25-12 and used a different length chain with each to keep the jockey pulley tension correct on the rear derailluer. I use a quick link (sram) on my chain to make it easy to remove. you can determine the correct chain length by wrapping the chain snugly around the largest rear sprocket and largest front chainring, without going thru the jockey wheels, and adding 2 complete links (1 set of inner and outer plate = 1 link)

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Hi Barefooter - good point and I hadn't shortened the length of the chain. However, in my case I am not sure this will have any benefit as I only ride on the middle front rine ring, so the tension should be well within range, but I will give it a try!

Peter