What is the appropriate rear tire pressure?

[MacAnthony]

According to the international GBT2978-2008 standard, the recommended rear tire pressure is 2.4-2.5 bar. The hazards of over-inflation are as follows: Reduced tire friction and adhesion, affecting braking performance; Causes steering wheel vibration and deviation, reducing driving comfort; Accelerates wear on the central tread pattern, shortening tire lifespan; Increases vehicle vibration, indirectly affecting other components' longevity; Overextends tire cords, reducing elasticity and increasing load during driving; Decreases puncture resistance. When encountering sharp objects like nails or glass, they can easily penetrate the tire, causing internal cracks or blowouts. The hazards of under-inflation are as follows: Increases friction with the road surface, raising fuel consumption; Makes steering heavy and prone to deviation, compromising safety; Increases movement of tire components, causing abnormal heat from excessive rolling; Weakens cord and rubber functions, leading to delamination or cord breakage and excessive friction with the rim; Multiplies ground friction, rapidly increasing tire temperature and softening the rubber; May cause blowouts during high-speed driving; Increases tire deformation, causing sidewall cracks and excessive heat from flexing, accelerating rubber aging, cord fatigue, and breakage; Also enlarges tire contact area, accelerating shoulder wear.

[JasonMarie]

I have quite some experience with rear tire pressure issues after driving for so many years, and I've noticed many car owners tend to overlook it. My advice is to check the recommended values on the label near the driver's door frame. For most sedans, the rear tire pressure should be between 30 to 35 PSI, depending on your specific model. If it's a small car, 32 PSI is usually ideal; for SUVs or vehicles frequently carrying loads, you can increase the rear tire pressure to 35 PSI. I learned the hard way—driving long distances with underinflated tires caused excessive wear and an uncomfortable, bumpy ride. Just check the tire pressure monthly using a manual pressure gauge. In summer, tire pressure rises quickly due to high temperatures, while it drops in winter, so timely adjustments are necessary. Maintaining proper tire pressure extends tire life, reduces accident risks, and makes driving much smoother. Remember, the most accurate measurement is when the tires are cold, so check after the car has been parked for a few hours. Don't overinflate—going above 35 PSI carries significant risks.

[DaniellaMarie]

I always prioritize tire safety when driving, maintaining rear tire pressure within the recommended range of 30 to 35 PSI. Why this value? Too low and the tire deforms, overheats, and risks a blowout; too high causes bumpy rides and faster tread wear. Check your vehicle manual or door frame sticker for the exact number. Requirements vary by model—for instance, compact cars with light loads may need 30 PSI, while heavy loads might require 35. Temperature changes also affect pressure, dropping about 1 PSI per 10°C decrease. Monthly checks are crucial—keep a pressure gauge handy for quick tests. Maintaining proper tire pressure ensures safety and stabilizes fuel consumption. I've noticed extra attention is needed for frequent highway driving or hauling loads. Don’t rely solely on repair shops; proactive checks by the owner are best. Equal pressure on both sides prevents steering pull. The right value extends tire life and saves costs.

[DiEmilia]

I always remind my family to pay attention to the rear tire pressure for safety. The correct range is 30 to 35 PSI as indicated in the car manual. Low tire pressure can cause instability, deformation, and even blowouts during high-speed driving; too high pressure reduces grip and increases the risk of skidding in rainy conditions. Checking is simple: buy a small pressure gauge and measure when the tires are cold. Do this once a month, ensuring both sides are equal to prevent pulling. For example, my family car's rear tires are usually kept at 32 PSI, increasing to 34 when carrying passengers. Adjust for large temperature differences—higher in summer and lower in winter. Proper tire pressure ensures a comfortable and safe ride, reducing wear and protecting the whole family. Regular checks are a key habit. Safety always comes first.