Question about lug nut size

[tecNINE69]

Hello everyone!

I have a question about lug nut size for my 2007 Audi A3. I am in the process of buying some BBS LMs (size 17 x 8.0). The person I am buying from is keeping the lugs he used for the LMs for his RS6 wheels. I was wondering what size lug nut I need in order to fit my car? Thank you very much.

-Nathan

[pDubs]

Do you have a stud conversion to use lug nuts or do you mean wheel bolts? BBS LMs are conical seat and if you aren't running spacers you just use stock length which is 27-28mm. So what you need to order is conical seat 14x1.5x28mm wheel bolts.

If I'm not mistaken the rs6 wheels will be ball seat like our oem wheels, if that's the case either he wasn't running the right wheel bolts with the LMs or he isn't going to be running the right ones on his rs6 wheels.

[tecNINE69]

Hey pDubs,

Thanks for the quick reply. I'm going to pick up the wheels tomorrow after taking a look at them over the weekend. Thanks for the clarification. He wasn't sure himself of what he was used (bolts or lug conversion), as he got the wheels put on by a shop. I won't be running spacers, so I will try and see if the stock bolts can go the distance.

-Nathan

[pDubs]

Hey pDubs,

Thanks for the quick reply. I'm going to pick up the wheels tomorrow after taking a look at them over the weekend. Thanks for the clarification. He wasn't sure himself of what he was used (bolts or lug conversion), as he got the wheels put on by a shop. I won't be running spacers, so I will try and see if the stock bolts can go the distance.

-Nathan

No no no, sorry if I wasn't clear. Our stock wheel bolts are 14x1.5x27mm and are ball seat...see pic below



Ball seat cannot be used on the BBS LM because they need conical seat. Just like you cannot use conical seat on OEM wheels. It's a bit confusing at first but pretty simple. Here's another pic. The gray stripe being the wheel.



As you can see it wouldn't be safe to run ball seat on a wheel that is conical, and it wouldn't be safe to run conical on a wheel that is ball seat. What I meant by using stock length means the 27 mm or 28mm because you aren't running spacers. If you ran a 10mm spacer you'd need 37-38mm bolts to compensate for the lengths.




edit: here's a video explaining it as well if mine was still confusing.

http://www.youtube.com/watch?v=-4PTM8yny24

[tecNINE69]

Oh alright, thanks for the explanation. I picked up the wheels today and noticed he was using wheel bolts to secure the LMs to his A3. They were indeed conical seat which is correct according to your post. However, I was also looking into stud conversion for security purposes. He also included the hub centric rings already which was nice. I guess my question now is, from this page:
http://www.ecstuning.com/Audi-A3-FWD...ug_Conversion/

If the stock bolts are 28mm, and I found some open ended lug nuts (in 14x1.5) that are 48mm, that means I can get the 70mm wheel stud, which leaves 42mm for the lug nut to fit, right?
Thanks for all the help so far.

-Nathan

[pDubs]

It's perfectly fine for you to run the wheel bolts with the LMs. Just make sure you get conical seat 28mm. BMWs, Audis, Mercedes all run wheel bolts so it's definitely not a safety issue. Some people just find studs more convenient if you are frequently taking your wheels on and off, or if you want to run a nice set of lug nuts.

If you did do it though those studs look good. You'd need 20 of these.

http://www.ecstuning.com/Audi-A3-FWD...version/ES229/

20 of these for the LMs or other aftermarket wheels.

http://www.ecstuning.com/Audi-A3-FWD...version/ES241/


and 20 of these for your OEM wheels.

http://www.ecstuning.com/Audi-A3-FWD...version/ES240/


That's 200-300 dollars depending on if you need the ball seat to run stock wheels in the winter or whatever. I'd just pick these up for about 60 bucks and you'll be good to go and can put that money somewhere else.

http://www.ecstuning.com/Audi-A3-FWD...eat/ES2130057/


Now's a good time to make sure you aren't going to want to run spacers too because then you'd need to order new wheel bolts again.

[Autenzo]

Not sure if I should address my enquiry to this old thread or start a new one … apology, but this is my first post.

My first Audi A4 2003 B6 2.0lt sedan came with steel rims which I wanted to replace with mags, and since that omitted any tools for changing a tyre I started checking what else may have been overlooked … such as using oem bolts for steel rims on the mags, so I have come up with the following concerns;

· The oem steel rims were 16¼” (edge) x 195mm running 195 / 60R15 tyres … I have one as a spare.
· The bolts are 48mm overall with 27mm thread – ball seat and use a 17mm socket.
· The mags are genuine Audi 18½” (edge) x 225mm running 205 / 50 ZR17.

Since the steel rims seem to have a conical seat and are a good 10mm or 12mm (guesstimate looking through bolt hole) thinner than the mags, I wondered about compatibility if I need to use the spare.

1) Firstly, can the ball seat bolts be used on the thinner steel rims?
2) If there is any considerable difference in the circumference of the spare and the 3 mags does it set off any electronic warnings with speed sensors?
3) Are the bolt thread lengths under size for the added thickness of these alloy rims (in other words are they the oem bolts that came with the steel rims)?

[Autenzo]

4) Pardon my ignorance, but when you use a lock nut (one on each wheel) do you have to consider wheel balance?

Not sure if I should address my enquiry to this old thread or start a new one … apology, but this is my first post.

My first Audi A4 2003 B6 2.0lt sedan came with steel rims which I wanted to replace with mags, and since that omitted any tools for changing a tyre I started checking what else may have been overlooked … such as using oem bolts for steel rims on the mags, so I have come up with the following concerns;

· The oem steel rims were 16¼” (edge) x 195mm running 195 / 60R15 tyres … I have one as a spare.
· The bolts are 48mm overall with 27mm thread – ball seat and use a 17mm socket.
· The mags are genuine Audi 18½” (edge) x 225mm running 205 / 50 ZR17.

Since the steel rims seem to have a conical seat and are a good 10mm or 12mm (guesstimate looking through bolt hole) thinner than the mags, I wondered about compatibility if I need to use the spare.

1) Firstly, can the ball seat bolts be used on the thinner steel rims?
2) If there is any considerable difference in the circumference of the spare and the 3 mags does it set off any electronic warnings with speed sensors?
3) Are the bolt thread lengths under size for the added thickness of these alloy rims (in other words are they the oem bolts that came with the steel rims)?