"acronym for Support And Gear?"

A location along the course of a long mass-participation recreational ride providing mechanical and/or medical assistance to riders in need. Volunteers at the SAG station may also dispatch SAG wagons to assist riders stranded along the course. A SAG station may also function as a food stop.

"SAG" (most commonly written in all uppercase) may derive from a rider "sagging" off the back of the group, or it may be an acronym (or a backronym) for "Support And Gear" or "Support Aid Group."

[edit] SAG wagon

Support motor vehicle following long races or recreational rides to pick up riders unable to complete the event. See also: food stop and SAG station.

In racing events, typically the main group of riders will ride as a peloton and can be served by one or more SAG wagons trailing behind. In large recreational rides, there may be thousands of riders spread over much of the course, so ride organizers may employ roving SAG wagons to locate and assist stranded riders.

In bicycle racing, another term for SAG wagon is broom wagon."