Kei Vehicles Capabilities 
by derekheidenreichOctober 22, 2025
Top Speed & Limits of Kei Trucks, Vans & Cars Guide
by derekheidenreichOctober 22, 2025Kei Truck, Vans & Cars Top Speed
Knowing the top speed of your Kei truck also called mini trucks in the U.S., Kei van, or Kei car, as well as the restrictions and capabilities, is crucial to preparing for the challenges you may face. Kei Vehicles, with their engine displacement limited to 660 cc or less, have top speeds ranging from 50 mph (80 km/h) to 86 mph (140 km/h). However, there are several limitations, restrictions, and safety limits to consider for the top speed of Kei trucks (mini trucks), vans, and cars, not just by the vehicle's make and year, but also by the Japanese and United States governments.
Speed Limiters & Regulations
Before 1987, speed limiters were used to limit the top speed of Kei trucks (mini trucks), vans, and cars to 62 mph (100 km/h). Some manufacturers also installed sound alarms after the vehicle reached 52 mph (85 km/h). From 1987 to the present day, the top speed limit for kei trucks, vans, and cars has been set at 87 mph (140 km/h). Kei trucks that are newer than 25-years-old and imported into the USA for off-road use are limited to 25 mph by the U.S. government.
U.S. States: Kei Vehicles Speed Regulations
Find out how to bypass these state restrictions through our road legality guide below.
- Missouri: 45 mph
- North Dakota: 55 mph
- New Hampshire: 35 mph
- North Carolina: 55 mph
- New Hampshire: 35 mph
- Tennessee: 35 mph
- Utah: 50 mph
Common Kei Vehicles Top Speed
Below are the typical top speeds of the most common street-legal Kei vehicles in the U.S., ranging from models from the 90s to 2000. These limits can be higher depending on the model.
- Kei Trucks: 62+ mph (100+km/h)
- Kei Vans: 62+ mph (100+ km/h)
- Kei Cars: 74+ mph (120+ km/h)
Safe Max Speeds & Limits
While some sections of Japanese expressways allow speeds of up to 100 km/h (62 mph), the vast majority operate at speed limits between 80 km/h (50 mph) and 70 km/h (43 mph). The majority speed limit, which ranges from 50 mph to 43 mph, should be viewed as the standard for a safe maximum speed.
Kei trucks (mini trucks), vans, and cars are not engineered for fast speeds. Although they are typically very light, weighing 1,500 to 1,800 pounds, the engines are limited to 660cc, which results in their transmissions being geared high. Going or exceeding 62 mph (100 km/h) can easily lead to unsafe driving conditions and excessive engine stress, which the engine was not designed to withstand. Kei trucks are engineered for Japan's smooth and well-maintained roads, where the driving culture is generally less aggressive.
Hulling & Towing speed
Kei trucks (mini trucks), vans, and cars have a payload capacity set by the government, ranging from 440 to 771 lbs, while a Kei truck can have a maximum hulling capacity of up to 970 lbs at slow speeds. Explore all the information in our detailed guide on Kei truck payloads!
