Pneumatic tire

摘要

A pneumatic tire adapted to effectively suppress temperature rise of a tread portion during loaded rolling of the tire, and sufficiently suppress failure of the tread portion due to the temperature rise. The tread portion of the pneumatic tire extends between both tread ends and has a tread surface with lug grooves. Each lug groove extends in a tire width direction and has an opening at its one end to a buttress that extends from the tread end radially inwards of the tire. The buttress has a surface with a projection on one side, in a tire circumferential direction, of the buttress-side opening of the lug groove to protrude in the tire width direction. The projection has a radially outer end in a radially outer side than a radially inner end of the buttress-side opening of the lug groove.

主权项

1. A pneumatic tire comprising a tread portion that extends between both tread ends, wherein the tread portion has a tread surface formed with lug grooves, the lug grooves each extending in a tire width direction to a buttress and having an opening at least at its one end, the buttress extending from the relevant tread end radially inwards of the tire, characterized in that:
the buttress has a surface provided with a projection, which is situated on one side, in a tire circumferential direction, of the opening of the lug groove on a side of the buttress to protrude in the tire width direction; and the projection has a radially outer end, which is situated on a radially outer side than a radially inner end of the opening of the lug groove on the side of the buttress, wherein said tread surface is formed with sipes, which are in communication with the lug groove and narrower than said lug groove.