Question regarding spacers

[astonmartin007]

Was wondering if I can put 2 or 3mm spacers without changing bolts length.
And if so do I risk vibration problem?

[rollerton]

Depends on your bolts, wheel hub thickness and things. A general rule is that the amount of thread protruding out the rear of the wheel (amount/ length of thread that screws into the hub) should be roughly equal to the size of the bolt head. So, if your OEM Audi lugbolts are 17mm then ideally you want not less than 17mm of threads available to screw into the hub.
Personally if you have DO have that 17mm I wouldn't feel it's too risky if it was only 14-15mm by using the 3 mm spacer. My opinion in those situations is that if the 2-3mm is the difference between failure and no failure and you DO have a failure, then it was probably going to happen anyway. It makes sense in my brain somehow.

[Vanimal]

Rollerton said it best. If you already have the bolts 2-3mm should be fine without too much worry. But if you don't have them and are ordering a set and want to sleep better at night & have slight OCD like me with stuff like that. It would make sense to order the 3mm longer ones. Shouldn't be a big price jump at all.




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[Brozee]

You should have no problem with the stock lugs as long as it goes in enough and you get at least 3 good turns on a torque wrench once its snug with your hand.

[astonmartin007]

Ok great thanks guys for your help and precise answers!

[new2s5]

You might have a vibration problem if all of the above aren't followed correctly. Don't skimp , buy the proper spacers and extended bolts for your application. Observe the proper torque and tightening procedures. Done right, you'll be fine. 2/3mm spacers don't seem like not much of a spread. Do a search here to see what others have done.

[JamesRS5]

2 to 3mm is approximately 1 thread (one rotation) of the wheel bolt so you should be ok. Rule of thumb, the bolt should penetrate the hub the same amount as the thickness of the wheel bolt.
A 2mm spacer shouldn't give you any vibration problems providing the wheel will still mount hubcentric.