Lug nut size

[Fishalaska]

Anyone know the lugnut size and thread size for Raptor trailers?

Scott

[GaryWT]

Not sure of the exact size but they always seem to be different than the tow vehicle. I catty on of the X bars with 3 different ends and there is always one that works.

[bobbecky]

Most likely the thread size will be 1/2" X 20, and the socket needed will be either a 13/16" or a 7/8".

[MBD]

What bobbecky said

If you really want to know, take one off and go to Pep Boys (or similar store) and they will have a display with various size wheel studs for the express purpose of determining size and thread pitch.

[bobbecky]

When you do determine what the lug nut size is, I would suggest getting a deep six point socket. That way, the socket will not deform the nuts, and will fully cover the lug nut when torquing them. I use an impact socket, because you will be torquing them to 120 ft lbs, and you don't want a socket to crack while trying to get under way down the road.

[Dave W]

I have yet to see one on a towed RV that wasn't 1/2-20 regardless of whether it's a 5,6 or 8 lug hub. But of course there is probably an exception somewhere out there. 13/16" is your normal socket for that size lug nut but some are 3/4" though and are often a fancy chrome type but those will still have the same large bearing surface on the wheel. The lug nuts should be torqued to 90 lb ft.

[Desert185]

I have yet to see one on a towed RV that wasn't 1/2-20 regardless of whether it's a 5,6 or 8 lug hub. But of course there is probably an exception somewhere out there. 13/16" is your normal socket for that size lug nut but some are 3/4" though and are often a fancy chrome type but those will still have the same large bearing surface on the wheel. The lug nuts should be torqued to 90 lb ft.

I believe 90# is for steel wheels. See page 21.

http://www.keystonerv.com/media/161426/Owners_Manual_2013_E.pdf

[Dave W]

I believe 90# is for steel wheels. See page 21.



(tx)Yep, you are correct -

But I'll personally still stay with 90 +10, -0 lb ft as my many years past US Army auto mech training taught me which has served me well :) (Heck, even my street rod wheel manufacturer, Billet Specialties, uses 90 lb ft for lug nuts)

[Desert185]

(tx)Yep, you are correct -

But I'll personally still stay with 90 +10, -0 lb ft as my many years past US Army auto mech training taught me which has served me well :) (Heck, even my street rod wheel manufacturer, Billet Specialties, uses 90 lb ft for lug nuts)

The spec for my wife's car (aluminum wheels) is 100# and my RZR (aluminum wheels) is 120#. Do you use 90# on your TV, also? Mine call for 135#.

[Dave W]

The spec for my wife's car (aluminum wheels) is 100# and my RZR (aluminum wheels) is 120#. Do you use 90# on your TV, also? Mine call for 135#.

Spec on my wife's Fusion is 90, my '11 TV is 165 with aluminum wheels. The last TV, an '06 was 150 with similar wheels but Ford upped it by 15 lb ft for '11 on.

[JRTJH]

There are two different "wheel types", lug centric and hub centric. I'm certainly no engineer and won't even speculate on all the "force differences" between how the two differ or are similar.

I do know that between aluminum and steel wheels, 0 degree offset trailer wheels and 16 degree TV wheels, 1/2" and 9/16" lugs, open lug nuts and chrome "closed" lug nuts, there are some significant differences in how wheels are "held in place" on an axle.

Hub centric trailer wheels don't carry the same torque requirements as lug centric (or even hub centric) vehicle wheels. Steel wheels, some with aluminum or chrome facings that make them look like aluminum wheels are also a "confusing addition" to both trailer and vehicle applications.

It's best to follow the owner's manual for each application. In the Keystone Owner's Manual, you'll find this: "Reapply torque (at 110-120 ft/lbs or 140-150 ft/lbs for 9/16” stud)" The 110-120 Ft/Lb torque is for 1/2" lugs which is what you'll find on almost every Keystone RV, with the exception of some "heavy duty" models in the toy hauler and luxury lines. For the "vast majority" of us, we have 1/2" lugs and the wheel lugnut torque is 110-120 Ft/Lbs.

Follow the Owner's Manual for torqueing sequence and stepped torque procedures.

Good Luck.