Stock Wheel Stud Specs and Replacements for the XR4Ti

[anglin]

While digging around in the posts for some other project I am working on I stumbled across the following information in another thread. The post was actually made to IMON, I just cut and pasted it into the MCAF last year sometime. Of course this topic comes up from time to time, so here it is for review prior to going to the FAQ section.

I believe replacement studs are available from Ford. FYI, the OE stud measurements are 12mm 1.5, 12.95mm knurl dia, 15mm shoulder length, 38mm overall length.

As an alternative to OE Ford, there's a Mazda car/Ranger truck stud that fits well. Available in aftermarket. 12.95 knurl, 12.7 shoulder, 42.4 overall. The NAPA part number is 641-2197. This stud has the advantage of giving an extra 3-4 threads of engagement on the front wheels over the OE part, which IMO is probably okay for normal street driving, but too short for spirited motoring peace of mind.

[DPDISXR4Ti]

If you are motorsport-oriented or have a need for longer studs due to spacers, take a look at the following item:

http://www.mc2racing.com/products/xr4ti ... index.html

[Frag]

It's been covered before so you can search for details. I believe I replaced a few of mine with (1st gen?) Taurus studs.

[jkxr4ti]

http://forum.merkurclub.com/forum/viewtopic.php?t=7990

Here's a post from a while back with specs and pictures of a stock, napa, and arp wheel studs.

[anglin]

http://forum.merkurclub.com/forum/viewtopic.php?t=7990

That is an excellent post. I was wondering about this so I said to myself, "Self, I said to myself. Why didn't I see this thread before today?" The answer is the date... it was posted right when I was most disconnected from the internet on my deployment. Tada! Thanks for posting that.

Regarding the Taurus wheel studs. Here's the thread that I grabbed the Roland Zuk quote from:

http://forum.merkurclub.com/forum/viewtopic.php?t=7730

In that thread...

The problem with the Taurus studs is that the shoulder diameter is slightly larger than stock. They just don't fit.

[jkxr4ti]

Chris, its great to have you back and posting again.

You will notice in the link Grayson and i were discussing the napa wheel studs I had pictured and the length of the shoulder or un-threaded portion. The napa units 641-2792 would be suited for an aftermarket wheel replacement but not necessarily a stock replacement. I would still like to hear from those using the napa 641-2792 and see how those fair with stock wheel equipment.

[salukixr4ti]

Or get them new from ford-I did.
E7RY-1107-A

[janvanv]

If you are motorsport-oriented or have a need for longer studs due to spacers, take a look at the following item:

http://www.mc2racing.com/products/xr4ti ... index.html

If you are motorsport oriented and want to actually make something stronger while you're going to all the trouble of searching and putzing around changing things seems we, as usual, have examples from Ford Motorsport of a better solution: M14 x 1.5 and in high hp appications a 3/4" or 19mm straight sleeve to fit into the steel insert in the wheel----so you're sending forces thru the straight shoulder and not sending all drive and braking loads thry the narrow 2-4mm cone of contact on the lug nuts


Now that's the ultimate, the 14mm and the straight sleeve and matching steel inserts in the the wheel.

Seems baffling to me that there are those here who claim to be big experts on suspension and "racing" and no talk of something as common and useful as at least the 14mm studs .


Note that some wheels you might have to chase out, but that's worth it for the huge increase in strength when you have 33% more area in the stud between 12mm and 14.

[thesameguy]

Seems baffling to me that there are those here who claim to be big experts on suspension and "racing" and no talk of something as common and useful as at least the 14mm studs .

I *think* this discussion was focused on length, not strength. The stock studs are simply too short for most any application other than stock wheels, hence this discussion.

[Frag]

Seems baffling to me that there are those here who claim to be big experts on suspension and "racing" and no talk of something as common and useful as at least the 14mm studs .

I *think* this discussion was focused on length, not strength. The stock studs are simply too short for most any application other than stock wheels, hence this discussion.

Yes but someone went down the road of ARP studs, they are supposed to be STRONGER as well as longer.

[granth]

http://www2.cip1.com/ProductDetails.asp ... C10%2D6690

Here's the studs I bought and plan to use. Not sure on knurl blah, blah, blah, but since the hub has to be machined anyhow, I'm not so worried about it. Has the pretty little starter nub on the top. You can see the lug nuts I also got a little way down, though Compomotive is sending me some new studs with the new wheels as well.

M14X1.5 as Ford specified for rally cars (like I have) and is used on many top rally cars today.

The MC2 ARP once have worked well thus far however and are fine for 99.8% of Merkurs probably and will likely remain on my spares.

[vcallaway]

I thought the thread was "stock" stud replacements.

You can get them from Rapido for about $2 ea.

[granth]

I thought the thread was "stock" stud replacements.

Reads to me a stock stud specs and replacements. Which I infer as being open to non-stock replacements.