| 摘要 |
MOTORCYCLETYRE A motorcycle tyre (1) comprises a tread portion (2), the tread portion including a tread rubber portion (2G), the tread rubber portion including a center portion (CR) disposed in a center region of the tread portion including a tyre equator (C), a pair of shoulder portions (SH) disposed each side of the tread edge (2t) and a pair of middle portions (MD) each disposed between the center and shoulder portions in each side of the tyre equator, and the center, middle and shoulder portions satisfy the following relations: E*1 < E*2 < E*3, 0.9 < tan6l/tan62 < 1.1, and 0.9 < tanS2/tanS3 < 1.1, wherein E* 1, E*2 and E*3 are complex elastic moduli of the center , middle and shoulder portions respectively, and tan6 1, tan62 and tanS3 are loss tangent of the center, middle and shoulder portions respectively. C* co uN |
