SFMTA is saying 80,000lbs for the LRV2/3 and 78,000lbs for the LRV4 – I rounded it up to 100,000 because the last time I thought about their weight was when they were new (and their weight as a point of ire). Breda over promised and underdelivered and the LRV2s were quite a bit heavier than expected prompting a lot of teeth gnashing (and eventually a lawsuit if memory serves) from residents. Wikipedia pegs the New Flyers at about 45,000 lbs. BART's cars were in the 50,000 lb range due to their extensive use of aluminum.
Trains are heavy and often operate at faster speeds than buses, that's why they can get away with relatively few axles.
https://sfbayca.com/2016/05/05/new-muni-trains-on-schedule-f...
