Rough terrain vehicle

A rough terrain vehicle comprising a frame extending forwardly and rearwardly, a left-rear trailing arm, means for pivotally connecting said left-rear trailing arm at the forward end portion thereof to said frame for rotation about a first transverse axis, a left-rear ground engaging wheel mounted on the rear end of said left-rear trailing arm, a left-front supporting arm, means for pivotally connecting the trailing end portion of said left-front supporting arm onto said left-rear trailing arm for rotation about a second transverse axis longitudinally spaced from said first transverse axis, a left-front ground engaging wheel mounted on the forward end portion of said left-front supporting arm, a left-front double acting hydraulically expansible chamber interconnected between said left-front supporting arm and said frame, a right-rear trailing arm, means for pivotally connecting said right-rear trailing arm at the forward end portion thereof to said frame for rotation about said first transverse axis, a right-rear ground engaging wheel mounted on the rear end portion of said right-rear trailing arm, a right-front supporting arm, means for pivotally connecting the trailing end portion of said right-front supporting arm on said right-rear trailing arm for rotation about said second transverse axis, a right-front ground engaging wheel mounted on the forward end portion of said right-front supporting arm, a right-front double acting hydraulically expansible chamber interconnected between said right-front supporting arm and said frame, a first double acting hydraulically expansible side chamber pivotally connected at opposite ends to said left-front supporting arm and said left-rear trailing arm, a second double acting hydraulically expansible side chamber interconnected between the right-front supporting arm and the right-rear trailing arm, a hydraulic pressure source and tank on said frame, hydraulic conduits on said frame for variously interconnecting said double acting expansible front chambers and side chambers to said source and to said tank, and manually controllable valving for controlling said conduits.