2-axle vehicle: maximum 48,000 pounds, neither axle exceeds 25,000 pounds. Weight distribution is the amount of the total vehicle weight imposed on the ground at an axle, group of axles, or an individual wheel.3-or-more-axle vehicle (axle spacing 18 feet or more): maximum 68,000 pounds gross 20,000 pounds on one axle and 48,000 pounds on the tandem.These are manufactured by TATA but however have slight differences like the weights no. 4-or-more-axle vehicle (axle spacing 23 feet or more): up to and including 76,000 pounds gross maximum of 44,000 pounds on one tandem and 44,000 pounds on the other. Recently the OM352 was licensed by TATA for use in their 713S Trucks.However, this isn't accurate due to slight variances in the setup can cause all the figures to be all over the place. 5-axle tractor semitrailer combination 100,000 pounds gross maximum of 48,000 pounds on either tandem. An exact figure can't be given although some claim that when properly setup 33 percent will be on the trailer axle, 33 percent on the tongue weight, and 33 percent on the front axle.6 or more-axle tractor semitrailer combination 120,000 pounds gross 48,000 pounds on drive tandem 60,000 pounds on semitrailer tandem.
(see table in DOC 2) Practical Maximum Weights with a Permit Maximum legal weight for vehicles on all highways based on Federal Bridge Formula. Axle spacing within an axle group has a lot to do with what is allowed by states, so check with the states directly. Changing the kingpin setting and/or moving the trailer axle group forward or backward. Two consecutive sets of tandems may carry 34,000 pounds each providing the overall distance between the first and last axles of such consecutive sets of tandems is 36 feet or more. Moving the product forward or backward will distribute weight differently.