| 摘要 |
<p>A pneumatic tire (1) is provided in a tread portion (2) with four main circumferential grooves (3) having a groove width HG of not less than 4 mm, thereby dividing the tread portion into a central land portion (4c), a pair of middle land portions (4m), and a pair of shoulder land portions (4s). Each land portion (4c,4m,4s) is made of block rows (Bc,Bm and Bs) divided by axial grooves (5), and each block (6) has sipes (7). An axial width (wc) of the central land portion (4c) is 10 to 15% of a tread ground contacting width (TW); an axial width (Wm) of the middle land portion (4m) is 15 to 22% of the tread ground contacting width (TW); and an axial width (Ws) of the shoulder land portion (4s) is 15 to 22% of the tread ground contacting width (TW). The middle land portion (4m) is divided by a narrow circumferential groove (9) having a groove width (HG) in a range of 2 to 6 mm into an axially inner part (4mi) and an axially outer part (4mo).</p> |
