Patent ID: 8083297

Claim:
A coreless rubber crawler traveling device, comprising a tracker roller and an endless rubber elastic body, wherein an outer surface of the tracker roller comes into contact with and rolls on an inner periphery rolling contact surface of the rubber elastic body, and wherein the rubber elastic body comprises: main cord rows embedded in the rubber elastic body along a longitudinal direction of the rubber elastic body; rubber projections formed on an inner peripheral surface of the rubber elastic body at uniform pitches; rubber lugs formed on an outer peripheral surface of the rubber elastic body; wherein the tracker roller is provided at the side of a vehicle body in such a manner as to straddle the rubber projections at right and left sides in a widthwise direction thereof, and wherein the tracker roller has two different diameters at both right and left sides in the widthwise direction of the rubber projections, the two different diameters making up the outer surface of the tracker roller such that a contact area of the endless inner periphery rolling contact surface with the outer surface of the tracker roller in a fixed widthwise region on respective left and right sides of the tracker roller is in the range of 30% to 70% with respect to the area of the outer surface of the tracker roller.