Business Class including FL106 (Conventional); Rear Single Axle; Main Springs
FL50, FL60, FL70, FL80 and FL106 (1991-2006)
FS65 school bus chassis (1996-2008)
MB50, MB60, MB70 and MB80 (1991-2002)
Refer to heavy duty listings for models with heavy duty single axle suspension, or models with air suspension.
Heavy duty suspension springs are 60 1/2" long, .702 steel, no hooks or radius leaf.
Cargo; Cab Over Engine (COE); Rear Single Axle; Main Springs
FC70 and FC80 (1998-2007)