John Deere Original Equipment V-Belt – M139970 Traction Drive Belt Specification: Belt Section HA, Effective Length 131.449 IN, Width 0.500 IN, Thickness 0.310 IN, Angle 32, Material Spec Kevlar. Fits the following John Deere models: SST15, CV155, SST16, 16, SST18, 18. This is an O.