Ford 2013 Flex Owner's Manual page 366

Retighten the lug nuts to the specified torque within 100 miles
(160 kilometers) after any wheel disturbance (such as rotation, flat tire,
wheel removal).
Lug nut socket
size/Bolt size
1 ⁄ x 20
2
* Torque specifications are for nut and bolt threads free of dirt and
rust. Use only Ford recommended replacement fasteners.
2013 Flex (471)
Owners Guide gf, 4th Printing, December 2012
USA (fus)
Wheels and Tires
Wheel lug nut torque*
ft-lb
100
Note: Inspect the wheel pilot hole
and mounting surface prior to
installation. Remove any visible
corrosion or loose particles.
365
N•m
135