What should be avoided when setting up the derailleur system?

When setting up the derailleur system, one critical aspect is adjusting the stop limit screws. These screws are designed to prevent the derailleur from moving the chain beyond the designated gears, which can cause damage to the bike and affect shifting performance. If the stop limit screws are not set correctly, the derailleur may allow the chain to move too far either toward the spokes or off the cogset, risking mechanical failure or accidents.

Changing the stop limit screws without careful consideration can lead to improper functioning of the derailleur and impact the bike's shifting accuracy and safety. It is essential to ensure that these are adjusted properly to maintain the integrity of the derailleur's operation.

In contrast, using barrel adjusters, performing regular maintenance, and ensuring proper chain tension are all positive practices that contribute to the smooth operation and longevity of the derailleur system. These elements help optimize shifting performance and improve the overall reliability of the bike.