Which TWO of the following happen when driving with tire pressure well below the specified level? Select TWO
💡 Hint
Low tire pressure makes the tire flex more, building up heat and changing the contact patch, which changes where the tread wears. Remember that wear appears in opposite places for too-low and too-high pressure, and recall the standing wave that occurs at high speed.
Answer: ①, ④
Explanation
Low pressure makes the tire flex a lot, so a standing wave forms easily at high speed and heat buildup raises the risk of a blowout. The outer edges of the contact patch bear the load and wear quickly, and higher rolling resistance uses more fuel. Wear only in the center is a sign of overinflation.
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