What is Tsuraichi? Dress-up, notes on driving, and vehicle inspection | MOBY [モビー]

What is Tsuraichi?

black sports car

Tsuraichi is also written as “one face” and refers to the state where there are no steps on the two sides. Tsuraichi in a car is a custom method that adjusts to reduce the step between the fender and the wheel surface.

Originally, Tsuraichi is a tuning method derived from putting on thicker tires within the specified body size and widening the tread in order to increase the driving performance of the racing car as much as possible. Currently, it is widely used as a dress-up method to make a car look cool.

One of the reasons why imported cars look cool is that they tend to be tough. On the other hand, most Japanese cars are designed to be fitted with metal tire chains, so they have no choice but to design them so that the wheels go inside.

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Will Tsuraichi pass the vehicle inspection?

Mechanic inspecting tires
© metamorworks/stock.adobe.com

Even if it is customized to Tsuraichi, it will pass the vehicle inspection. According to the safety standards for road transport vehicles, which are the criteria for vehicle inspection, there is no problem as long as the range of 30° forward and 50° behind the wheel center from directly above the tire wheel is within the vertical plane of the fender.

However, if extreme customization such as low vehicle height, negative camber that draws the letter “V”, and pulling tires are applied at the same time, it will be judged to interfere with safe driving and will not pass vehicle inspection. There are cases.

Authenticity of OK up to 10 mm overhang

With the June 2017 revision of the Safety Standards Act, the regulation prohibiting protrusion of the above-mentioned rotating part was reviewed, and a protrusion of up to 10 mm is now permitted. However, this is only allowed if the outermost part is a tire.

However, this law revision is only for rim guards andLike off-road tire logos and side blocks, this is a treatment for protrusions on the side of the tire, and is not intended to relax the protruding regulations of Tsuraichi wheels.

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