This is a Replacement Spirit Rear Roller Part Number K140065-Z3 Used on the Following Models Listed Below.

Spirit-
SpiritXT285 - 2011-2012 (285810) - 2011-2012
XT285 - 2005-2010 - 2005-2010
X Series Treadmill - XT285 - 2013 Ver. 2 (After SN 2858121212000001) - 2013 Ver. 2
X Series Treadmill - XT285 - 2013 Ver. 2 (After SN 2858121212000001) - 2013
XT285 - 285809
XT285 - 285815
XT285 - 580818
XT285 - 285810