Show I bicycles in which two pairs of 0 bevel gears gear are used instead of the chain are reported to have proved their superiority over the present style of wheel in a test in which a wheel was run thirty nine thousand miles without adjustment or appreciable wear dynamometer tests also show how that the bevel gears run with less motion than the chain it la Is stated that one of the largest manufacturers will soon put these wheels on the market markel an obstacle to their rapid introduction la Is the time required to construct the machinery neceL necessary sary for turning out the bevel wheels which must be matho mati callY accurate in form |