Torque spec on aluminum rim

[KenS999]

Hi I have a 2017 wolf pup 16fq and I'm wondering what the torque spec is for the wheel lugs on an aluminum rim.

[A32Deuce]

All the vehicles I have with Aluminum wheels is the same as steel. Half inch wheel stud, 95 to 105 ft lbs. I use a torque stick socket. Matches my beam torque wrench. That's 100 ft. lbs.

[KenS999]

Thank you

[KenS999]

Lug nuts are already exposed. Does that Center Hub cover have to be removed first in order to get the rim off the wheel?

[babock]

The center hub cover is installed from the rear so the rim comes off first and then you can get the hub cover off.

[KenS999]

Thank you that is what I need to know. Ken.

[CaptnJohn]

Manual says 120#...

[depler]

The manual for my 2017 Sprinter, which has 16" wheels (six bolts) says 177 ft. lbs. for steel, and 133 ft. lbs. for alloy (aluminum). These are the torque values I give to the Tire Service Centers when getting my wheels rotated.

Also the wheel bolts for mounting alloy wheels are different (longer) than those for mounting steel wheels.

[TitanMike]

Originally Posted by depler

The manual for my 2017 Sprinter, which has 16" wheels (six bolts) says 177 ft. lbs. for steel, and 133 ft. lbs. for alloy (aluminum). These are the torque values I give to the Tire Service Centers when getting my wheels rotated.

Also the wheel bolts for mounting alloy wheels are different (longer) than those for mounting steel wheels.

True for some. The alloy wheels on my trailer have steel inserts in the lug holes and other than the fact they are chrome lug nuts, have the same conical seat.

Torque values are all over the place. For mine it's 100 lbs.

Motor Homes will be different by manufacturer of the chassis and TT's will be different for each wheel stud size.

Pickups will have different torque valued based on axle ratings, stud size, and type of wheel.

Our dealers used to write torque values on the inside of hub caps with a sharpie after looking them up so the next time they didn't have to go to the book.

[itat]

On my 2019 Rockwood Signature 5er, the sticker says 100 ft lbs. but the tire installer who put my new GY Endurance tires on torqued the lug nuts to 120 ft lbs. The Dexter Torflex axles are rated for 5000 lbs. (Studs are obviously supplied by Dexter, not the wheel supplier.) Anybody know if that’s going to be a problem? I got no reply when I emailed the wheel manufacturer about what their wheels are rated for. I hope he didn’t over-torque and stretch the studs.

[depler]

A good cross-check would be to check the bolt-torque tables such as this one: https://www.boltdepot.com/fastener-i...ed-Torque.aspx


From that you can see that bolt torque is largely determined by size, thread, and grade of bolt. I think there are other factors, but those are the main ones.



I think there is also information on how those values are determined ... want just enough bolt stretch, but not too much.

[TitanMike]

Originally Posted by itat

On my 2019 Rockwood Signature 5er, the sticker says 100 ft lbs. but the tire installer who put my new GY Endurance tires on torqued the lug nuts to 120 ft lbs. The Dexter Torflex axles are rated for 5000 lbs. (Studs are obviously supplied by Dexter, not the wheel supplier.) Anybody know if that’s going to be a problem? I got no reply when I emailed the wheel manufacturer about what their wheels are rated for. I hope he didn’t over-torque and stretch the studs.

Shouldn't be a problem. If you were to look at a torque spec chart for automobiles using the same size stud and lug nut, depending on manufacturer of the vehicle the spec's can range all the way from 85# to over 120# for the same vehicle. I mean that's how the spec actually reads 85-120 ft lbs. Some mfr's were more specific, stating only a single torque spec with no range.

Lots of factors to take into consideration. Torque is specified by designers to achieve a given amount of stretch in the fastener (stud in this case) as it's the tension that keeps the nut from unscrewing. Now you have to add into the process the friction on the threads as well as the friction on the interface with the wheel. These all add to the overall torque needed to achieve the desired tension in the stud.

If they only torqued to 120# I doubt any damage was done to any stud. You could probably loosen and re-torque to 100# if for no other reason than to make it easier remove lug nuts should you need to change a tire along a highway.

[KenS999]

Originally Posted by CaptnJohn

Manual says 120#...

Just to be sure would that be the manual for the 2017 Forest River wolf pup 16fq with aluminum rims? Ken.

[KenS999]

I found this manual information thank you.