Autobus (cycling)
（重定向自Grupetto）
The autobus or the gruppetto is in bicycling terminology the name given to the group of cyclists in a road cycling race who form a large group behind the leading peloton.
The autobus forms on mountain stages when non-climbers fall off the back of the peloton during the climb. Gradually some riders fall off the back of the peloton and form a large group at the end of the race. These riders are generally sprinters or domestiques unconcerned about their finishing positions in the mountain stages. Their primary concern is beating the elimination time to ensure their survival in a multi-stage race such as the Tour de France.