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Old 04-28-20, 09:16 AM
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If you have been riding a SRAM system a lot prior to getting on you Shimano it may strongly explain the sensations you have. SRAM is much more of an clunck downshift, shimano is more subtle and may feel like something is wrong.
Do you have a buddy with a Shimano setup to compare?
I highly doubt its the spring in the derailleur.
Other smaller thing to check is your chain wear, cassette wear and derailleur hanger alignment - these can affect how the chain drops.

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