540 CMR: MASSACHUSETTS REGISTRY OF MOTOR VEHICLES
(1) No motor vehicle shall be altered or modified in any way that may
cause the vehicle body or chassis to come in contact with the roadway,
expose the fuel tank to damage from collision, or cause the tires to come
in contact with the body, chassis, or steering components under normal
operation. The horizontal plane, front to rear, shall not differ more than
(1) The maximum mechanical lift for four wheel drive motor vehicles
shall be calculated by multiplying the wheel base times the wheel track,
and dividing the product by a safety factor of 2200:
i.e., 92" w/b x 58" w/t = 5336/2200 = 2" (maximum mechanical lift).
The outside diameter of the largest tire size available from the original
manufacturer as standard or optional equipment for the particular motor
vehicle may also be increased up to an amount equal to the maximum
mechanical lift calculated.
Mud is Good!
Last edited by Mooman; 08-14-2007 at 05:50 PM.