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Wheel stud thread length with spacers

K

kmdavis

New member
Hi everyone.

Wheel stud length with spacers.
I have bought 7 mm wheel spacers (front) and 15mm hub extensions ( rear) purley for cosmetic purposes for for my C2 964, which has 17 inch Cup one's OE parts.
I am concerned about the thread engagement on the front wheel studs.
Whithout the spacers fitted there is 12.5 turns of the wheel nuts, with the spacer this is reduced down to 6 turns. I have not attempted to tighten these up to the 130Nm for fear of thread stripping.
Any recomendations? My thought was to use steel wheel nuts rather than the original Aluminium, I assume they are aluninium?.

PS Alex thanks for the event at C of G and nice to meet all 964 fans

Regards Keith Davis
 
Keith,

According to Adrian's book, shims thicker than 6mm require longer studs to be fitted to the hubs. The hub extenders are fine since they have their own studs but the only solution for the front is the longer studs I'm afraid. You are right to be concerned about the lack of "meat" for the nut with the present standard studs. Unfortunately I believe you have to dismantle the hb to replace the studs.

Regards

Dave
 
ORIGINAL: kmdavis
Whithout the spacers fitted there is 12.5 turns of the wheel nuts, with the spacer this is reduced down to 6 turns. I have not attempted to tighten these up to the 130Nm for fear of thread stripping.
Any recomendations? My thought was to use steel wheel nuts rather than the original Aluminium, I assume they are aluninium?.
Regards Keith Davis
Click to expand...
The wheel nut needs to be located on the stud by a minimum of 1.5 times the stud diameter. Hope this helps.
Regards,
Clive
 
Agree you are going to have to fit longer studs on the fronts. The existing ones are just not long enough. Unfortunately fitting steel wheels nuts is not a way to get around the lack of thread (btw I prefer steel ones anyway and have them on my car - vw type 4 van nuts I believe).

Ian.
 
I had the same problem when i fitted 9mm spacers to correct the offset on my rear wheels. Its an easy job to change the wheel studs,although fairly expensive for what it is!! about 40-50 for the new bolts

You need to jack up car and remove wheel.

Remove caliper and disc (you will probably need impact screw driver to undo countersunk screw locating disc)

The studs then have to be persuaded from their locations with a hammer!!! I put a steel wheel nut on the thread to stop damaging them and used a copper mallet. They are then removed from the rear of the hub. (you will see once its all apart).

The new longer bolts are then inserted and pulled in either using a slide hammer or the trusty steel wheel nut and a piece of tube.

Should not take any longer than 2-3 hours at most to do.

Tim
 
Thanks for the relies
Jazmine who sold me the spacers, has said that he can source the increased length studs, but he firstly needs to know what the standard length stud is, does anyone know the answer to this? The studs I am told will be aprox £6 to £7 each.
Worst case that is £70 I am wondering if it is worth it. As I said I'm looking to fill the arches for cosmetic reasons only.
Keith
 
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