| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of soil congestion between lugs and to prevent damage of a plowed field by tilting the front end part of the lug at an angle within a specific range to the tire axis direction. SOLUTION: An inclination angle of a front end part 5 in a lug 4 to the tire axis direction is set to be a range from 10 deg. to 45 deg.. More desirably, the inclination angle ranges from 15 deg. to 30 deg.. When a wall face 6 in the lug front end part 5 is tilted at 30 deg. or more to the tire diameter, soil can be excellently trodden down and damage of a plowed field can be prevented, however, a space between the lugs 4 in the vicinity of an equator is extremely narrowed contrarily and soil draining ability is lowered. However, when the inclination angle of the front end part 5 in the lug 4 to the tire axis direction is set to be a range from 10 deg. to 45 deg., a space between the adjacent lugs 4 can be opened. In this way, soil draining ability can be improved and tractive force can be increased. |
