What is the tire pressure for large vehicles?

[StWalter]

The standard tire pressure for large vehicles is between 2.5 and 2.7 bar. For regular tires, the appropriate tire pressure should be maintained at around 2.5 bar. If using steel-belted tires, the pressure can be slightly higher, around 2.6 bar. The specific tire pressure for freight tires should be adjusted according to the manufacturer's recommended values, which refer to the tire pressure when the vehicle is in a cold state. Hazards of overinflated tires: Reduced 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 the lifespan of other components. Decreased puncture resistance. When encountering sharp objects like nails or glass on the road, they can easily penetrate the tire, causing internal cracks or bursts, leading to a blowout. Hazards of underinflated tires: Increases friction with the road surface, raising fuel consumption; makes the steering wheel heavy and prone to deviation, compromising driving safety; increases movement of tire components, causing abnormal heat due to excessive compression; reduces the functionality of cords and rubber, leading to delamination or cord breakage, and excessive friction with the rim causing damage to the bead area and abnormal wear.

[JosieDella]

I remember paying special attention to tire pressure during my last long-haul truck drive. It's quite different between heavy trucks and passenger cars - the standard cold tire pressure for trucks usually ranges between 7.5-9.5 bar, depending on the vehicle model and load. You can set lower pressure when empty, but need to pump up to maximum when fully loaded. During summer highway driving in high temperatures, I'd keep it 0.3 bar lower than usual to prevent overheating and blowouts. I always check with a mechanical gauge before loading - the old fleet mechanic taught me that electronic sensors sometimes fail. Wrong tire pressure really hurts fuel efficiency - last time my colleague's trailer ran 1 bar under pressure and burned 3 extra liters per 100 km.

[AddysonFitz]

Our auto repair shop frequently encounters commercial vehicles with tire pressure issues. The specific values should be checked against the tire pressure label on the door pillar. For semi-trailers, the drive wheels typically require 7-8 bar, steering wheels 6-7 bar, and trailers around 4.5 bar when unloaded. Newer vehicles come equipped with tire pressure monitoring systems, but older models require manual measurement using a tire pressure gauge. Seasonal adjustments are necessary - for every 10°C temperature change, tire pressure changes by 0.1 bar. During a recent maintenance check for a logistics company, we found one-third of their trucks had abnormal tire pressure, with some tires showing uneven wear and deformation. Incorrect tire pressure also affects braking distance, creating particularly dangerous situations during rain or snow.

[OEmiliano]

After driving heavy trucks for ten years, I can't stress enough how important tire pressure is. For my 6x4 tractor, when unloaded, I maintain 6.5 bar for the front tires and 7 bar for the rear tires. When hauling 35 tons, I adjust it to 7 bar for the front and 8.2 bar for the rear. Seasonal changes require readjustments—winter pressures need to be about 0.5 bar higher than in summer. The most critical point is that the pressure difference between left and right tires must not exceed 0.2 bar, or the vehicle will pull severely to one side. Always measure tire pressure when the tires are cold; checking right after highway driving can show readings over 1 bar higher. Last time at a service area, I saw a young guy with a bulging tire—it was caused by overinflated tires and overloading on a long haul.

[VanWeston]

With 20 years of managing transport fleets, tire pressure standards are etched in my mind. Standard dump trucks require 6-9 bar, while concrete mixer trucks demand 7.5-8.5 bar. New vehicles come with overinflated tires - we always release 0.8 bar before putting them into service. Each vehicle's standard pressure is labeled below the B-pillar on the driver's side, and I recommend checking twice monthly with calibrated gauges. One rainy accident investigation revealed a 1.3 bar difference between right and left front tires caused severe skidding during braking. Now all vehicles have wireless TPMS with real-time display on the dashboard.