Why is cross-chaining discouraged?

• A. It improves efficiency
• B. It reduces wear on chain
• C. It places the chain on extreme gears, increasing wear
• D. It makes shifting smoother

Answer: (C)

Cross-chaining is discouraged because it makes the chain run on an extreme gear combination, pulling the chain at a diagonal angle rather than in a straight line. That diagonal path places extra lateral stress on the chain, the front chainrings, and the rear cogs, so they wear faster. The teeth engage less cleanly when the chain isn’t lined up, which can shorten drivetrain life, increase friction, and make shifting feel less smooth. In short, keeping the chainline as straight as possible reduces wear and improves efficiency, whereas using extreme gears accelerates wear and can lead to other shifting or rubbing issues.