Nio's Li: A 20% Heavier Car Does 2.07 Times the Road Damage

A 20 percent increase in vehicle weight does 2.07 times the damage to roads, Nio founder, chairman and CEO William Li said on Thursday, warning that China's battery-capacity race is shifting costs onto public infrastructure.

"Some cars are packed with 120-kWh batteries weighing 700 to 800 kilograms. The weight doesn't matter much to the car itself, but has anyone calculated the impact on the roads?" Li said at the auto industry night forum of the 2026 World Internet Conference in Wuzhen, Zhejiang province.

"At 1.2 times the weight, the damage to the road is 2.07 times," he said, according to a Yicai report published Friday. The arithmetic comes from the "fourth-power law" in road engineering, which holds that pavement damage is proportional to the fourth power of axle load. One-point-two to the fourth power is roughly 2.07. The law is well established. Whether Chinese buyers will accept smaller batteries to spare the pavement is another matter entirely.

What does Nio give up to stay light?

Li conceded the trade-off cuts both ways. Nio's battery packs typically weigh 400 to 500 kilograms, and that lighter weight means accepting smaller capacity and shorter driving range while the company keeps hunting for solutions inside those limits.

"Will we be rewarded for doing this? I don't know," he said.

That is a candid admission from a CEO whose signature selling point is battery swapping and long range. Competitors stacking 120-kWh packs can advertise range Nio cannot match. Li's argument is that the industry is quietly exporting its engineering costs to road agencies and taxpayers.

He shared the stage with Eric Li, chairman of Zhejiang Geely Holding Group, in their first public dialogue since the two companies signed a comprehensive strategic partnership on charging and battery swapping on September 28. The discussion centered on battery lifespan and energy replenishment strategy.

How long has Li been pressing this?

This was not a one-off. The record shows a sustained campaign:

• On July 6, 2025, Li said in a livestream that the industry is blindly expanding battery capacity, noting that "the heavier the car, the greater the damage to the roads, which is why many countries levy taxes based on vehicle weight." The remarks trended on Chinese social media.
• At this year's Beijing Auto Show, Li said Nio runs an approval system for weight targets on every model, with every additional kilogram requiring his personal sign-off.
• In May, he told Yicai that "if China's more than 300 million vehicles all become heavy vehicles, the roads will be crushed," and called for national weight restrictions.
• "Without national-level guidance, the industry will descend into disorderly competition," he said at the time.

In a June interview, Li put a price on the last grams: cutting a smart EV's weight from 2 tons to 1.9 tons is relatively easy, but in the final sprint of development, removing 1 kilogram costs about 1,000 yuan ($149).

Are the numbers backing him up?

Ministry of Industry and Information Technology data show the average curb weight of new passenger cars in China reached 1,704 kilograms in 2024, up nearly 400 kilograms from 1,312 kilograms in 2012. In the first four months of 2026, the average curb weight of passenger NEVs had already hit 1,939.3 kilograms, Yicai noted. Electrification is accelerating the trend, not just accompanying it.

What are regulators doing?

An EV energy consumption limit standard that took effect on January 1, 2026 is the world's first mandatory cap on EV electricity consumption. For the first time, it ties consumption limits to curb weight, with stricter thresholds for models above 2,710 kilograms. The standard is about 11 percent tighter than the previous recommended version. A model weighing around 2 tons must not consume more than 15.1 kWh per 100 kilometers (62.137 miles); after technical upgrades, driving range rises about 7 percent on average with battery capacity unchanged.

Yicai also reported that Chinese regulators have begun studying a tax system reform based on vehicle weight — the very mechanism Li demanded in May. A study is not a policy. The currency rate is $1 = 6.7168 yuan.

What to watch next: whether the weight-based tax study becomes a draft regulation, and whether Nio's lighter-pack bet shows up in its 2026 delivery mix against rivals selling 120-kWh range.