Abstract: A vehicle such as straddle type suitable for running on a rough has a front wheel, which is steered, disposed in front of a vehicle body frame and a rear wheel disposed to the rear side thereof. Such vehicle is provided with a vehicle body frame structure which comprises a front frame unit, a center frame unit, and a rear frame unit. These front and center and rear frame units are first assembled individually as a unit and then coupled together integrally as a vehicle body frame structure.

Abstract: A vehicle such as straddle type suitable for running on a rough has a front wheel, which is steered, disposed in front of a vehicle body frame and a rear wheel disposed to the rear side thereof. Such vehicle is provided with a vehicle body frame structure which comprises a front frame unit, a center frame unit, and a rear frame unit. These front and center and rear frame units are first assembled individually as a unit and then coupled together integrally as a vehicle body frame structure.

Abstract: A saddle-type vehicle for operation on irregular and uneven ground, wherein a pair of rear suspension arm assemblies each connected pivotally to the rear part of a main frame of the vehicle. The assemblies have suspension arm portions connected operatively at their middle points to the lower end of a shock absorber, and rear end portions disposed at a higher and/or inner position than front end portion thereof. The main frame has a pair of lower tubes connected rigidly with a corresponding pair of upper tubes by way of connecting members. The pair of lower tubes are formed at their midway portions to provide holding members for the front end portions of the suspension and these holding members are directed in the same direction as swing axes for the suspension assemblies.