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3mm spacers on front with out extended studs. Safe?

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Old 03-26-15, 11:30 PM
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b17what
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Default 3mm spacers on front with out extended studs. Safe?

I some how managed to damage my oem wheel hitting the grand canyon of pot holes. To the point that my strut got messed up. I replaced that and wanted to throw of beater wheels I have for my mk3 supra. And that is where I came into a problem. The hit the calipers just barely. The 3mm spacers make them clear the caliper but there just doesn't seem to be much thread to put the nuts on. Maybe I am just used to longer studs since I have ran extended studs on almost everything I have had.

What would be the safe length of stud. The new wheels require the angled tip nuts instead of the oem ones which makes the wheel seem a little thicker at the stud.

I do plane on getting wheels for this car but that will have to take a month or two since I just bought it and dropped 2k on a down payment... so strapped for $ for a bit.

Appreciate any help.

edit: it's a early 96 ls400
Old 03-27-15, 11:23 AM
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oldskewel
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How many threads are engaged? Count the turns when you put it on, including torquing it down.
Old 03-27-15, 12:05 PM
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RA40
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Diameter of bolt should equal the amount of minimal thread engagement. On the Lexus at 12x1.5mm where 1.5 is 1.5mm per full turn, you would want 8 full turns to equal 12mm. More is better. People go less but it isn't the suggested by SAE (Society of Automotive Engineers)
Old 03-30-15, 03:14 AM
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b17what
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Originally Posted by RA40
Diameter of bolt should equal the amount of minimal thread engagement. On the Lexus at 12x1.5mm where 1.5 is 1.5mm per full turn, you would want 8 full turns to equal 12mm. More is better. People go less but it isn't the suggested by SAE (Society of Automotive Engineers)

It did about 7 turns. But it just didn't feel safe to me. I went ahead and put my mk4 supra turbo wheels on it. No need for spacers and used original nuts.

Thank you for your help
Old 03-30-15, 12:25 PM
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timmy0tool
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i usually feel that 5 full rotations is enough, but make sure it's torqued properly and the center bore is correct! 3mm spacers should have no problems with this, 5mm being the max!
Old 03-30-15, 12:34 PM
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oldskewel
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Yes, I would feel safe with 7 turns.

If you were to have a problem, you'd probably first notice it when torquing things down - threads would yield, which you could tell by a reduced rate of increase in torque with increasing angle. If they torque on OK, ...

Then if things were to start to fail, it would probably not be an all at once catastrophic failure where all the lug nuts blow off and you crash. One might work loose / fall off / you'd feel a vibration / etc.

So it's good to be safe, but I think you could run with 7 turns if you change your mind.
Old 03-31-15, 01:40 AM
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b17what
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I appreciate the help guys. It just didn't want to chance it. If I go with aftermarket wheels that require tuner lugs I'm just going to go with extended studs.
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