CDL.TO
Moderator
Steve Munro addresses this on his blog after talking to a TTC engineer. While the new LRV is heavier, the "unsprung weight" is less then on the CLRV/ALRV. On the current vehicles, the motors and other equipment is rigidly attached to the trucks. On the new vehicles, there are two sets sets of suspension between the wheels and the motors, gearing, etc, so in effect there is less weight being transmitted into the tracks.
Makes sense. Thanks.