PNEUMATIC TIRE

摘要

An object of the present invention is to provide a pneumatic tire capable of significantly increasing the possibility that the tire can be recycled as a base tire for a retreaded tire without so much sacrificing a product life of the tire prior to retreading. Specifically, the present inventions provides a pneumatic tire 1 having a tread portion 2, plural tread grooves including a first tread groove 5 and a second tread groove 15 formed in the tread portion, and a first bottom-up portion 10 with a top surface 10a as a tread wear indicator, the first bottom-up portion being provided at a groove bottom 5b of the first tread groove 5 such that a distance measured in the tire radial direction from an opening end position 5a of the first tread groove to the top surface 10a is x1, comprising: a second bottom-up portion 20 with a top surface 20a as a retread indicator, the second bottom-up portion being provided at a groove bottom 15b of the second tread groove 15 formed in the central region 3 of the tread portion 2 such that a distance measured in the tire radial direction from an opening end position 15a of the second tread groove to the top surface 20a is x2 shorter than said x1.

主权项

1. A pneumatic tire having a tread portion, plural tread grooves including a first tread groove and a second tread groove formed in the tread portion, and a first bottom-up portion with a top surface as a tread wear indicator, the first bottom-up portion being provided at a groove bottom of the first tread groove such that a distance measured in the tire radial direction from an opening end position of the first tread groove to the top surface is x1, comprising:
a second bottom-up portion with a top surface as a retread indicator, the second bottom-up portion being provided at a groove bottom of the second tread groove formed in the central region of the tread portion such that a distance measured in the tire radial direction from an opening end position of the second tread groove to the top surface is x2 shorter than said x1.