What does turning the motorcycle key to the third position mean?

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Tire aspect ratio is a data point of a tire, referring to the percentage of the tire's cross-sectional height to its maximum cross-sectional width. Below are the precautions for tire replacement and the characteristics of low aspect ratio tires: Precautions for tire replacement: The tires equipped when the vehicle leaves the factory are the optimal specifications selected by the manufacturer after repeated testing. If you want to replace tires with different sizes and specifications, it must be done under the guidance of professionals and not arbitrarily, as this involves many issues, and even slight negligence can pose risks to driving safety. Additionally, low aspect ratio tires tend to be more delicate, requiring more attention and care during use. Characteristics of low aspect ratio tires: Low aspect ratio, large inner diameter tires have shorter sidewalls and wider treads, resulting in a larger contact area and the ability to withstand greater pressure. They are very responsive to the road surface, have strong lateral resistance during turns, and enhance the vehicle's handling performance.