The present invention relates to valves for inflating the tires of rubber wheels, in particular of vehicles, where the term vehicles is intended as motor vehicles, trucks, motorcycles or in general means of transport by road. More in detail, the invention relates to a valve (1) of snap-in type for rubber wheels comprising: - a hollow valve body (2) of cylindrical shape arranged for connecting the inside of said rubber wheels with the outside environment and allowing passage of air; - an actuating mechanism (3) of said valve (1) arranged inside said valve body (2); - a rubber ring (4), suitably shaped, arranged for partially covering said valve body (2), wherein said valve body (2) comprises at least one portion (20) made of plastic material.