9️⃣ 底盤
M Mman Jan 4, 2006

Something about inflation pressures from Tire Rack

以下文字轉載自Tire Rack網站
Disadvantages of Underinflation

An underinflated tire can’t maintain its shape and becomes flatter than intended while in contact with the road. If a vehicle's tires are underinflated by only 6 psi it could weaken the tire's internal structure and eventually lead to tire failure. Lower inflation pressures will allow more deflection as the tire rolls. This will build up more internal heat, increase rolling resistance (causing a reduction in fuel economy of up to 5%) and reduce the tire's tread life by as much as 25% while increasing the probability of irregular treadwear. Drivers would also find a noteworthy loss of steering precision and cornering stability. While 6 psi doesn't seem excessively low, it typically represents about 20% of a passenger car tire's recommended pressure.

Disadvantages of Overinflation

An overinflated tire is stiff and unyielding and the size of its footprint in contact with the road is reduced. If a vehicle's tires are overinflated by 6 psi, they could be damaged more easily when encountering potholes or debris in the road, as well as experience irregular tread wear. Higher inflated tires cannot isolate road irregularities as well causing the vehicle to ride harsher and transmit more noise into its interior. However, higher inflation pressures reduce rolling resistance slightly and typically provide a slight improvement in steering response and cornering stability. This is why participants who use street tires in autocrosses, track events and road races run higher than normal inflation pressures.
裡面提到胎壓對於轉向能力的影響 可能會讓台灣99.9%的玩車人跌破眼鏡
不過 信者恆信,不信者恆不信

⁨4⁩ ⁨個評論⁩

記得一個車玩很兇的外國友人跟我說, 胎壓的設定是胎本身的最大容許值的90%。
每一條胎的胎壁上都會紀著它的最大容許值,例如寫著 " Max PSI = 44 PSI" 之類的, 那該胎的胎壓設定就是 44 x 90% = 39~40 (大約啦), 所以我就打 40 PSI。
其實我自己的感覺是有點硬, 可是路感跟油耗都好很多!所以就一直這樣用下來了, 也不知道這觀念對不對,給大夥兒參考參考!