I recently put on my aluminum Alcoa "classic 8" wheels. I torqued them to 150#'s........I talked to someone recently that works at a Dodge dealership, they explained that they torque the 2nd gen wheels to 170#'s. Is 150#'s too much for aluminum wheels or do I need to go higher? This is a custom application so I'm a little confused. Anyone have good info on this subject?

Thanks in advance

 

I wouldn't go over 125 on aluminum wheels at the very most!

 

factory specs are 105 but most half in studs you want to torque to 125

 

Thanks guys! I haven't driven the pickup yet........so 1st thing tomorrow I'll lower the torque value to 125#'s. Thanks

 

In our business, we see this every day, aluminum wheels working themselves loose and eventually ruining the wheel and studs.


After a lot of observations, I believe that the aluminum is soft and the nuts, being much harder steel, sort of eat away at the aluminum, thus loosening the torque by making the wheel thinner.

I don't so much think the wheel loosening problem is the cause of the lugs actually backing off, but on account of what I just described in the previous sentence.


Just to be safe, aluminum wheels should be checked regularly.

 

woh so i over tightened mine then? i just got new aluminums but i tourqued then to 160# i should go looser then? or should i stay the sam since i tightened them that much already

 

I think you have a 250, so my remarks are not 100% to the point, but might give you an idea.
On a dually, Alcoa rims are fitted with 2-piece flange nuts (dia. 5/8, pitch 18) which give a bearing dia. of about 1 3/8" flat against the forged aluminum. This limits or prevents the digging. The torque value is stamped on the nut: 150ft/lbs. A lug nut cover fits over to give it the "nice" look.
Maybe, you can use similar lug nuts with covers. A good place for lug nuts is prestigewheels.com: if you know the exact specs of the lug nuts, they have tech drawings.
Hope that helps some.

 

i torqued my eagle alloys to 125 without a second thought, i torque about 20 wheels a day so it can be a thing aqquired by feel! somewhat

 

Hhhmmm, maybe I should shoot Alcoa Co. an email to get an answer to this question. I have talked to their representitives before (great customer service). I would like to get a somewhat official answer, don't want to damage the wheels or lug nuts.

 

i just titen them till i cant any more far as i know there still on the truck

 

I'd say ask the company that made the wheels. They would know for sure (or at least they SHOULD).

Daniel

 

Alcoa Wheel Company got back to me concerning the torque value for the Classic 8 wheels. The torque is 90-100 ft lbs and re-torque after 50 miles of driving. Hope this helps other Alcoa wheels owners