[Tigers] 1/2 inch or 12mm wheel studs

[Smit, Theo]

I've used ARP/Mark Williams and Moroso threaded studs, and Moroso press-in
studs. Either one (threaded or press-in) will work fine as long as you install
them correctly; the threaded studs typically require a washer under the
shoulder and the hub so that the fillet on the underside of the head can clear
the threads. ARP makes specific note of this in their installation
instructions.

12mm studs are only 1mm larger diameter than 7/16 studs, so they will probably
even work with wheels originally designed for 7/16 studs and taper nuts, but
you run the risk of having someone, that doesn't realize you have metric
studs, inadvertently thread on the improper lugnuts.

The recommended installation torque for the threaded studs I used was
something like 90 ft-lb, which is required to make sure that the stud doesn't
inadvertently thread itself into the hub as you're driving. I had Doug
Jennings' (Tiger Auto, in Dayton OH) machinist drill and thread a new set of
hubs with 1/2-20 threads. Not cheap, but bombproof.

The most fiddly bit with press-in studs is the pressing in part. You can use a
large-body 1/2" nut and a washer stack to pull the stud into the hub;
alternatively you can use a large bench vise or a hydraulic press, but with
either of those you have to ensure that it goes in straight.

Cheers,
Theo

> -----Original Message-----
> From: tigers-bounces at autox.team.net [mailto:tigers-
> bounces at autox.team.net] On Behalf Of genepadgett at comcast.net
> Sent: April 14, 2011 8:49 PM
> To: tigers at autox.team.net
> Subject: [Tigers] 1/2 inch or 12mm wheel studs
>
> I am looking to install 1/2 inch or 12mm studs.I want to keep my
> existing hubs
> with their 7/16 inchB studs and get a separate set ofB  hubs for the
> largerB studs. I know the front hubs are the same as for a Series IV- V
> Alpine.B B  Are the rears also the same? I have kept my oem 13 inch
> wheels.All
> in case some day I can go b ack if I ever wanted to.
>
>
>
> I would appreciate the benefit of the experience of others who have
> made this
> type of change.I understand thereB are clearance issues as to size of
> head and
> knurl .What sizes will work? Which is better,B screw-in or press-in
> studs? Any
> particular brandsB recommended or otherwise? Do 12mm studs work okay
> with
> wheels drilled for 1/2 studs (the std to metric conversion is pretty
> close!).Anything else to consider?
>
>
>
> Thanks in advance for any and all guidance!Gene
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