Section 184(1) in The Bihar Motor Vehicles Rules, 1992
(1)Subject to the provisions of Rule 185, a tractor may draw more than one trailer:Provided that no tractor shall draw on a public road-(i)a trailer exceeding ½ metric tonne in weight unladen and fitted with solid steel wheels less than 60 centimeters in diameter, or(ii)a dise harrow without trolley wheels used as trailing implements behind a tractor.
