![Amazon.com: SCC ZT729 Super Z LT Light Truck and SUV Tire Traction Chain - Set of 2, Silver : Automotive Amazon.com: SCC ZT729 Super Z LT Light Truck and SUV Tire Traction Chain - Set of 2, Silver : Automotive](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/61tK4jLg10L.jpg)
Amazon.com: SCC ZT729 Super Z LT Light Truck and SUV Tire Traction Chain - Set of 2, Silver : Automotive
What is the purpose of the chains that hang on the underside of some school buses and trucks? - Quora
![TIL the chains that you can see hanging under school buses and trucks are there to provide traction in snow. With the flip of a switch, the chains will lower automatically and TIL the chains that you can see hanging under school buses and trucks are there to provide traction in snow. With the flip of a switch, the chains will lower automatically and](http://i.imgur.com/qlHN7gB.png)
TIL the chains that you can see hanging under school buses and trucks are there to provide traction in snow. With the flip of a switch, the chains will lower automatically and
![A New York City bus with chains on its tires for traction in the snow. Flushing, Queens, New York City Stock Photo - Alamy A New York City bus with chains on its tires for traction in the snow. Flushing, Queens, New York City Stock Photo - Alamy](https://c8.alamy.com/zooms/9/290da3f348ff42e6936a7261a1105355/fcnmbf.jpg)
A New York City bus with chains on its tires for traction in the snow. Flushing, Queens, New York City Stock Photo - Alamy
![A New York City bus with chains on its tires for traction in the snow. Flushing, Queens, New York City Stock Photo - Alamy A New York City bus with chains on its tires for traction in the snow. Flushing, Queens, New York City Stock Photo - Alamy](https://l450v.alamy.com/450v/2hnedxn/detail-of-chain-equipped-mta-bus-on-ninth-avenue-the-chelsea-neighborhood-of-new-york-on-saturday-january-29-2022-during-a-noreaster-which-threatens-to-drop-up-to-8-inches-in-the-city-according-to-some-weather-reports-the-storm-is-expected-to-blanket-the-northeast-with-some-unlucky-areas-expected-to-receive-over-a-foot-of-snow-yikes!-richard-b-levine-2hnedxn.jpg)