How much weight can a small car's trunk carry?

[StJameson]

The load capacity of a small car's trunk should preferably not exceed 150kg. Overloading will reduce braking performance: There are many factors that affect a car's braking distance, among which changes in the vehicle's load directly impact the length of the braking distance. Overloaded cars have increased inertia, resulting in longer braking distances. Overloading will shorten the lifespan of the leaf springs: Due to driving while overloaded, the leaf springs bear excessive force and continuously rebound during driving, which will shorten their lifespan. Additionally, the excessive load causes the entire vehicle to sink, reducing the clearance from the ground and diminishing the car's passage capability.

[DelAlina]

Once I hauled a bunch of renovation materials and ended up causing strange noises from the rear suspension. After checking, I found that the maximum load capacity of a car's trunk usually ranges between 200-300 kg. It varies by model—sedans generally have lower limits than SUVs. For example, a compact car might only handle 250 kg, but you also need to deduct the weight of the driver and passengers. Overloading can collapse the rear springs and accelerate tire wear. The mechanic warned me that the most dangerous risk is fishtailing during sudden braking. Now, I always weigh heavy items with a hook scale before loading them, as deforming the trunk floor panel could cost thousands to replace.

[GenevieveAnn]

I've researched the load-bearing parameters of many cars and found that the trunk's weight limit is actually hidden in the user manual, which most people aren't aware of. For example, German cars typically mark around 300kg, while Japanese cars may go up to 350kg, but it's crucial to note this weight includes all items in the vehicle. Once when helping a friend move, after filling the trunk with books, I noticed the rear wheels visibly sagging—only then did I realize books of the same volume weigh over three times more than clothes. Chronic overload can also cause trunk hinge deformation, leading to poor sealing and water leakage, and may even affect the rear frame's welding points.

[StJayce]

At a previous auto show, I chatted with an engineer who mentioned several key factors affecting trunk load capacity: First is the structural strength of the frame—more welding points generally mean better load-bearing capacity. Second is the suspension system, with independent suspensions typically being more durable. Then there's the tire load index, where letters like H or V indicate different grades. An average compact car can carry about 25 bags of rice (10kg each), but actual capacity depends on weight distribution—placing heavy items near the seats is more stable. I once saw someone crack the trunk floor by loading bottled water, with repair costs exceeding half a year's supply of mineral water.

[DiJuliette]

I conducted my own experiment using sandbags to test the load limits of three cars. The A-segment car bottomed out its shock absorbers at 280kg, while the B-segment vehicle could handle up to 320kg. I recommend checking the load capacity label on the fuel filler flap or B-pillar - that's the manufacturer's tested safety limit. When carrying heavy items, remember to distribute the weight evenly. Last time I helped someone transport gym equipment, stacking all the dumbbells at the rear caused the bumper to scrape the ground over speed bumps. Many modern cars use fragile resin trunk liners these days - overloading can cause permanent dents, and OEM replacement parts are particularly expensive.

[Dakota]

A common question is how much weight the trunk can carry, but there's no standard answer. From my experience with compact cars, they can typically handle 200-250 kg, while station wagons or SUVs can carry about 50% more. The key factor is the gross vehicle weight: for example, if the car's nameplate states 1800 kg gross weight minus 1400 kg curb weight, then the combined weight of passengers and luggage can only be 400 kg. Last week, I saw a case where a car owner overloaded the trunk with six boxes of engine oil, and the rear suspension arm snapped when going over a speed bump. Tires are also affected—overloading by 100 kg is like adding two more adults, significantly increasing the risk of a tire blowout when driving on highways in summer.