Lug Nut Torque

[UncleCreepy]

Also, keep in mind that some torque wrenches have two scales: one in ft-lb, the other one in Nm. Make sure you're using the correct one. If you accidentally (or should I say negligently) tighten the lug nuts to 129 Nm instead of 129 ft-lbs you'll end up with a torque of only 95 ft-lbs.

 

[Randy-12]

129 ft/lbs is the conversion for 75 nm
They use Newton Meters and converted it to Ft/Lbs for the manual.
I would not worry about 1 extra ft/lb

 

[rpiotro]

You'll be fine if you're off a little bit. 129 is the number that the engineers settled on but maybe you know better lol.

That odd number is most likely a conversion from Newton Meters. 175 Nm = 129 ft -lb.

 

[subieworx]

Unless you are using an insanely precise procedure and an insanely accurate torque wrench you are only ever getting it close to 129ftlbs at best. I have a very accurate $800 digital torque wrench that I use for wheels only and even with that it is almost impossible to hit the desired number dead on. And then the number reached is only as good as the accuracy stated in the manual for the torque instrument. ie, get it close and you'll be fine.

 

[rpiotro]

Unless you are using an insanely precise procedure and an insanely accurate torque wrench you are only ever getting it close to 129ftlbs at best. I have a very accurate $800 digital torque wrench that I use for wheels only and even with that it is almost impossible to hit the desired number dead on. And then the number reached is only as good as the accuracy stated in the manual for the torque instrument. ie, get it close and you'll be fine.

I'd like to add that. While getting it close (+/- 5 ft-lb) is good enough, just as important is getting them all relatively even.

The bottom line is that clamping forces are really the goal here. Those can vary quite a bit depending on the condition of the studs and nuts. If you really want to get anal about it make sure both pieces are clean and rust free. Use a wire brush if necessary and never ever lube them. Lubrication will produce excessive clamping forces.

 

[one2many]

I am sorta shocked that 129 for wheels. Back in the day day head bolts
were only around 120-130. The best is the VW bug flywheel bolt
at 185. Thats a big wench I guess.

 

[GenralSpecific]

I am sorta shocked that 129 for wheels. Back in the day day head bolts
were only around 120-130. The best is the VW bug flywheel bolt
at 185. Thats a big wench I guess.

Nah, it’s fairly common. Heck, my 2012 Mini Cooper was 129 as well. Course, it was a lot lighter though it only had four lug bolts per wheel…

 

[metroplex]

Ford specifies 150 ft-lb for their M14x1.5 lugnuts. Most shops that deal with the Fusion Sport/MKZ that uses this lug nut don't understand it is 150 ft-lb and not the normal 100 ft-lb! I was surprised to see Tesla Model 3 use the same lug size but at a lower torque value.

 

[rpiotro]

I am sorta shocked that 129 for wheels. Back in the day day head bolts
were only around 120-130. The best is the VW bug flywheel bolt
at 185. Thats a big wench I guess.

It does seem a little high. My Pontiac G8 GT was 120. MY Q50 hybrid was only 80. My wife's Mercedes is 92. I've promised to never second guess factory specifications. 129 it is for me.

 

[metroplex]

It does seem a little high. My Pontiac G8 GT was 120. MY Q50 hybrid was only 80. My wife's Mercedes is 92. I've promised to never second guess factory specifications. 129 it is for me.

It's the M14x1.5 studs. Most cars are 1/2. 129 seems low to me for M14x1.5 as I am used to 150