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Old 02-06-2017, 10:27 AM   #1
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Rennline Stud/Lugbolt Conversion

Has anyone replaced the OEM lug bolts with the Rennline studs? I want to make this conversion on my 2000 Boxster to make changing wheels easier....thinking 45mm all 4 corners will do the trick but want to hear from you if you have done the conversion. Thx
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Old 02-06-2017, 10:37 AM   #2
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Go longer
You may want to add spacers at some point. I have 60 mm and they fit up to 10 mm spacers no problem

Also, there are a bunch of lower cost studs available on ebay and amazon
search around a bit. IIRC, my studs were around $25 and the lug nuts were the same.
I bought silver colored ones as my wheels are silver and I think that looks better
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Old 02-06-2017, 11:06 AM   #3
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No affiliation but am happy with their products to date.

https://motorsporthardware.com/product-category/porsche/wheel-stud-conversion-kits-porsche/
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Old 02-06-2017, 11:14 AM   #4
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i have 45mm and am running 7mm spacers no problem. 10mm wouldnt be an issue either, but would have to have a look to see if there is enough thread for 15mm. realise that if you wanted to run a narrowbody wheel from a 911 (lots more selection, but with a 65mm offset) you would be looking at a 20 mm spacer. with a 20mm spacer you would want the type w integral lugs, and with 60 mm lugs on the car they wouldnt fit behind the wheel if that makes sense.

Last edited by The Radium King; 02-06-2017 at 11:31 AM.
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Old 02-06-2017, 11:17 AM   #5
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I am using the 65mm version of these:

M14x1.5 ACS Race Series Studs — Track-Studs.com

And these nuts:
Porsche PRO series nuts — Track-Studs.com

They don't stick out too far, and there is plenty of thread even if I wanted to run spacers within reason, but if I run my Carrera twist wheels, the rear have a pretty deep well for the lug nut and it is tough to start the nut by hand, if I had it to do over again I would get the 80 mm or even the 90 bullet nose:

M14x1.5 'Bullet Nose' race stud — Track-Studs.com

This is the wheel I'm talking about, have a pretty deep well in the wheel for the lug bolt/stud/nut, [edit: here is a picture of my rear wheels with the studs, see how deep they are in the wells? Plenty of thread engagement, but hard to start by hand.]



I love them, very easy to take wheels on and off this way.

Last edited by steved0x; 02-06-2017 at 11:55 AM.
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Old 02-06-2017, 11:23 AM   #6
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It also depends on how the studs are measured

Is it the full length, or just the amount extending past the rotor surface

These are what have
http://www.ebay.com/itm/20-Wheel-Stud-Conversion-14x1-5-TO-14x1-5-Studs-Adapter-Kit-63mm-2-50/261504562085?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D2%2 6asc%3D20131003132420%26meid%3D703bd76fddd1438b88a eecd42b84c758%26pid%3D100005%26rk%3D5%26rkt%3D6%26 mehot%3Dag%26sd%3D310852646707;


20 Pc Wheel Lug Nuts Ball Seat Porsche Open End 14x1.5 New

You want open ended lug nuts, so you can see that they are engaged with enough thread
That is also generally a requirement if you are tracking your car
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Old 02-06-2017, 11:26 AM   #7
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Quote:
Originally Posted by steved0x View Post
I am using the 65mm version of these:

M14x1.5 ACS Race Series Studs — Track-Studs.com

And these nuts:
Porsche PRO series nuts — Track-Studs.com

They don't stick out too far, and there is plenty of thread even if I wanted to run spacers within reason, but if I run my Carrera twist wheels, the rear have a pretty deep well for the lug nut and it is tough to start the nut by hand, if I had it to do over again I would get the 80 mm or even the 90 bullet nose:

M14x1.5 'Bullet Nose' race stud — Track-Studs.com

This is the wheel I'm talking about, have a pretty deep well in the wheel for the lug bolt/stud/nut, unfortunately this picture is the front, which has a shallow well and was easy to start by hand.



I love them, very easy to take wheels on and off this way.
Are this bolts or studs in the pic?
Looks like bolts
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Old 02-06-2017, 11:46 AM   #8
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This thread will save me $100. I was planning on doing studs before spring
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Old 02-06-2017, 11:52 AM   #9
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Quote:
Originally Posted by JayG View Post
Are this bolts or studs in the pic?
Looks like bolts
Those are the OEM wheel bolts, that is just the only picture of the style of wheel that I could find. Let me hunt around and see if I can find a picture with the studs.

[Edit: I found a pic of my rear wheel on the car with the studs in that style and replaced the picture, so now it shows the studs]

Last edited by steved0x; 02-06-2017 at 11:56 AM.
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Old 02-06-2017, 12:00 PM   #10
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Here is that style of wheel, with the front wheel shown with the studs.

Go longer, in fact I think I may go ahead and order the 90mm bullets... They don't stick out super far if you are worried about that.

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Old 02-06-2017, 02:23 PM   #11
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Quote:
Originally Posted by The Radium King View Post
i have 45mm and am running 7mm spacers no problem. 10mm wouldnt be an issue either, but would have to have a look to see if there is enough thread for 15mm. realise that if you wanted to run a narrowbody wheel from a 911 (lots more selection, but with a 65mm offset) you would be looking at a 20 mm spacer. with a 20mm spacer you would want the type w integral lugs, and with 60 mm lugs on the car they wouldnt fit behind the wheel if that makes sense.
You lost me...I have 23mm spacers on the rear and 15 up front.....sport classic IIs bbs style wheels. No intergal hub with lugs.

Is there a stud fittment issue that I am aware of. Yes I am way out there...not enough flexural rigidity on longer studs...65mm?
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Old 02-06-2017, 03:05 PM   #12
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i was talking these guys:



if you use these, then the studs on the car can interfere with the wheel when installed if too long. i'm sure you could use normal spacers with extra long bolts or studs as well. i'm not up on the physics of these things, so not sure if one is better than the other. with the method pictured you are more versatile for switching between different wheels with different offsets without having to have sets of different length bolts or have studs sticking out extra far.
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Old 02-06-2017, 03:06 PM   #13
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I think what he is saying is that generally thicker spacers like that should be bolted to the hub and those that are like that have ntegrated lug nuts built into the spacer. Similar to this. If you are sliding the spacer on the longer studs - I'd go with the 80mm to make sure you have clearance and sufficient threads for the nuts to thread on correctly.

I've had custom spacers done from Motorsport-tech.com for a couple of cars. I like that they can match your centerbore of the wheel so you don't have to use any centerbore rings if the wheels you are running have them.


Last edited by rastta; 02-06-2017 at 03:10 PM.
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Old 02-06-2017, 04:06 PM   #14
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Right right ...thanks guys. Yeah I am always a bit concerned about my thick rear spacers......on long studs now aswell
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