I took the truck to a new shop for a rotation and they commented on me having the wrong lug nuts. I have a 2000 F150 with a july 99 build date so i have the 12mm x 1.75" lugs. I put on some 2003 FX4 wheels which were using the 14mm x 2.00" lugs. They said because the FX4 wheels had larger openings for the 14mm studs that with my 12mm studs the wheels couldn't properly center and were resting on the studs causing excess stress to them and could break off.

So they suggested I look into a set of shank style lug nuts to fill the hole so the wheel was resting on the lug nut and not the lug. I am having a really hard time finding a 12mm x 1.75" shank style lug nut. Is this a legit concern?

thanks guys.

 

Does not matter..... You have hub centric wheels, so all the weight and centering is by the hub and the center of the wheel. The lugs just hold the wheel to the hub.

I've got some OEM polished alum wheels with the 14mm lug holes and been running them for a long time and I've not snapped any of my 12mm lugs....

I wouldn't worry about it... I sure don't....

Mitch

 

Thanks that does help a lot. I've been running these for a year and a half and never had a shop say anything about it. I have noticed the 14mm holes are kind of oblong now though, could that just be from the tire shops putting them on and wiggling them on to get all the studs to line up?

 

actually by putting lug centric (acorn style) nuts on there you would put the stress onto the lugs and not onto the hubs.

 

Man you just answered my question as well. I just bought four 17" teardrops for my 97 and noticed that the lugnuts the guy sent with them are for the 14mm and my truck has the 12mm studs. I forgot about the hub being the support not the studs. I thought I screwed up bigtime. Thanks.

 

if you would excuse the ignorance..
http://cgi.ebay.com/ebaymotors/97-03...Q5fAccessories
These are what i'm running..factory from the original 2000 wheels, they have a flat base. What is the difference with acorn or lug centric?

 

 

heres the style ones the fx4 wheels came with and the ones you would need

http://www.sfxperformance.com/parts/GOR26163HT.htm

 

not quite though, i pulled a lug nut off my dad's 03 fx4 and it was a 2" long flat base with a washer and closed end. It wasn't conical at the base like those.

So going by Pat, the one's the shop were saying i should get would put all the stress on the lugs? Are Acorn style anything that does not have a flat base? and is Acorn = bad?

 

best i could find online. i didnt take pics of the ones i had before i mailed them off.

they just look better in the wheels though.

 

i couldnt help but laugh after reading the first post, wow what a bunch of tards at that shop putting anything other then the flat washer style nut on those wheels would not be smart at all...

 

I should have known better, they also suggested putting in aftermarket torsion keys for the front....

So to sum it up, these guys were on crack and I'm fine running the OEM nuts with these 03 wheels?

 

yes. the wheels are HUB centric no problems.

 

correct, on OEM wheels you want flat washer style nuts. Aftermarket wheels depends on if you have adapter rings or not

 

The holes in your wheels should not be oblong?? That would indicate that the studs are hitting the edges of the holes.. The only way that could happen is if your not torquing the nuts?? The 12mm studs and nuts call for 100ft/lbs.

I've had mine on for at least 5 years now and the wheel holes are all still round.

Unless the wheel holes have the conical edges for the 'acorn' style of nuts, then you should not use them. If the wheels are flat, then you must use the flat nuts..

Mitch