[s-cars] I'm finally studly... (long)

[TM]

Scott-
The big pro to using studs is that it makes it much, much easier to
mount wheels because you're not fighting to hold the wheel on the hub
while trying to thread a lug bolt into the hub- the studs hold the
wheel easily, making the job much easier, whether it is trackside for
an autox or driver's ed event or on the side of the road in case of
a flat tire or simply for the biannual tire swap if you're in the snow
belt.

The con to using studs is that stud replacement, should you make a
mistake and damage the hub, requires removal and replacement of the hub
(to the best of my knowledge, hubs are not repairable easily or
cheaply),
wheel bearing and the offending stud. Also, the cost of the studs as
well
as getting the length correct can be a minus.

Taka

-----Original Message-----
From: s-car-list-admin at audifans.com
[mailto:s-car-list-admin at audifans.com] On Behalf Of Scott Munger
Sent: Tuesday, June 24, 2003 11:53 PM
To: 'steve powers'; 'northwest audi enthusiasts'; '* S List'; 'BIRA ORG'
Subject: RE: [s-cars] I'm finally studly... (long)


Would you mind explaining the pros/cons of lugs versus studs?

--Scott Munger
'93 S4
'97 Cabriolet



> -----Original Message-----
> From: s-car-list-admin at audifans.com
> [mailto:s-car-list-admin at audifans.com]On Behalf Of steve powers
> Sent: Tuesday, June 24, 2003 8:33 PM
> To: 'northwest audi enthusiasts'; '* S List'; 'BIRA ORG'
> Subject: [s-cars] I'm finally studly... (long)
>
>
> (cross-posted to BIRA, S-cars and NW Audi)
>
> Since installing my BIRA Sys 6 brake setup, I wanted to install wheel
> studs to make the wheel installation easier. At issue is the
> additional 3mm of rotor hat thickness which sort of defeats the
> hub-centric wheels
> where you put on the wheel, spin and slip in a bolt - all at
> once. Studs
> seemed like the best way to go, so I began researching the problem.
>
> The urS6/S4s use a pretty hefty lug bolt size (14x1.5mm). Removing one

> lug bolt and measuring several times with a 16p nail, hooking the head

> on the backside of the hub, I came up with a stud length target of
> 60mm overall length. I figured this length should allow for a
> to-be-sourced lug nut and still not protrude from the wheels.
>
> Calling a local vendor for H&R lugs I explained how I measured and
> what I wanted. They got the lugs and I took them home. They were
> wrong - too
> long by about 20mm! The studs consist of three areas: hub
> thread, waist,
> and lug thread. The length H&R quotes is lug thread. It makes
> some sense
> as you are supposed to thread in the lugs, bottoming them out
> in the hub
> on the waist of the stud. Re-order, this time in H&R's 40mm length.
>
> Meanwhile, I need some nuts. The stock wheels (and my 3 piece HRE
> wheels) use a ball seat. The rub is that there just aren't any
> aftermarket ball seat lug nuts. I checked with Tire Rack and others,
> including searching the web. You can get the standard steel ones,
> which I did. (Note: most aftermarket wheels use cone seats and you
> won't have
> this problem - it's just that mine didn't)
>
> I did discover though that Porsche also used 14x1.5mm lugs. They
> previously used lug nuts (alloy even!) on all of their cars but
> recently went to a funky lug bolt setup with spinning ball seat
> collar. I went to
> the local P-car parts dept. and bought one of the older black anodized
> allot lug nuts. It was the right thread pitch and may fit, though I
> wouldn't know until I installed the studs.
>
> I got the new studs today. I immediately removed a lug bolt and put in

> a stud. It fits! I jacked up the car and installed all the
> studs using red
> loctite and torqued them to 100 lb-ft with a double nut. I
> put the wheel
> back on and tightened a couple of the steel nuts on. I measured to see
> if the stud would bottom out on the Porsche lugnut. Nope, it
> will work.
> Yippee!
>
> Because I only had one Porsche nut, I installed the steel nuts. I have

> found an aftermarket supplier (www.boothedesign.com) for Porsche lug
> nuts in polished stainless. At $7 each, they're cheaper than the local

> Porsche dealer, who wanted $10 apiece for the weaker (but
> lighter) alloy
> ones. Boothe Design can also provide matching locks.
>
> Moral of the story: order the 14x1.5mm studs in 40mm length and hope
> your aftermarket wheels have cone seats. (you will need ball seat nuts

> for the stock wheels)
>
> Steve Powers
> 95.5 S6 Avant
>
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