What is the difference between four-groove and three-groove tires?

[CarterAnn]

Here are the differences between four-groove and three-groove tires: Drainage performance: Compared to three-groove tires, four-groove tires naturally have better drainage performance. Tires with deeper and more tread patterns on the market also tend to have relatively better drainage. Grip: Three-groove tires have a larger contact area with the ground compared to four-groove tires. Therefore, in terms of grip performance, three-groove tires outperform. Debris in the grooves: Since four-groove tires have one more groove than three-groove tires, they tend to accumulate more debris like small stones and broken glass in the grooves. The design of the grooves is primarily for drainage. In rainy weather or when driving through areas with standing water, the tires will splash water as they roll, which is essentially the process of the tire expelling water. In terms of drainage, more grooves naturally result in better drainage performance, with four-groove tires outperforming three-groove ones. Additionally, the tread pattern also plays a role in drainage—more complex and deeper tread patterns will provide better drainage.