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post #1 of 22 Old 21st October 2003, 07:58 PM Thread Starter
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Question Need help with Lug stud length

I am going to add a 3mm spacer and inquired about getting Longer Studs. This is the response i got and wanted to know if it was correct...
Quote:
Hi Sam,
If you're only going out 3mm, you may not need the longer bolts. That is, as long as you have enough threads making contact as you screw in the bolts. Per the H&R guide, you want a minimum of 6.5 turns for a 12x1.5 bolt. That equates to approx. 10 mm of load bearing shaft length.

As far as the longer bolts go, we just sell the H&R bolts. We don't stock the bolts, but rather order them and sell them with the spacers. Also, if you're looking for a nice looking polished bolt head, the H&R ones aren't shinny, but rather a natural color that would be best covered by some sort of hub cap if you are looking for show quality.
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post #2 of 22 Old 21st October 2003, 08:15 PM
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I went throught the same thing on the M3. The info you have is correct. To be on the safe side get your own torque wrench and check it the first week and then every few thousand miles thereafter until you're satisfied it'll be OK.

2000 E39 M5
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post #3 of 22 Old 22nd October 2003, 01:54 AM
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Re: Need help with Lug stud length

Quote:
Originally posted by Ocean-Side M5
I am going to add a 3mm spacer and inquired about getting Longer Studs.
Where are you getting the 3mm spacers from?

Phil

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post #4 of 22 Old 22nd October 2003, 02:53 AM Thread Starter
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I have called Tire Rack 3 times and spoke to customer service. They told ME they could not sell spacers seperate from the wheels??

By luck i did find someone ther who would sell them for like $12.95 a piece!

Talk to this guy:

Clay at (888)-541-1777 ext 206 or by direct email at [email protected]
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post #5 of 22 Old 22nd October 2003, 03:55 AM
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Re: Need help with Lug stud length

Quote:
Originally posted by Ocean-Side M5
I am going to add a 3mm spacer and inquired about getting Longer Studs. This is the response i got and wanted to know if it was correct...
For those who are having trouble ordering the 3mm spacers from Tire Rack, the correct part number is TR358. That will get you a 5 on 120 3mm spacer with a 74.1mm centerbore. They are $12.00 each. Having the correct Tire Rack part number may make your Tire Rack associate more comfortable selling them to you. I bought mine from Luke at x362.

As for needing longer wheel bolts, the answer is yes. I just did an experiment by installing a Tire Rack 3mm spacer under my rear wheel and used a stock BMW wheel bolt. I was able to get it to turn slightly more than 4.75 turns to a final torque of 88 lb-ft. That's 1.75 turns too few and, since the thread pitch is 1.5mm, it's about 2.6mm too short.

I do have a 4-wheel Brembo brake kit installed, so there is a slight chance that Brembo designed a 0.5mm to 1mm spacer into the hat. But I don't think that's the case and it's certainly not 2.6mm! I'll check into this tomorrow and get back to you.

Barring a revelation from Brembo, it's my opinion that you would be well served to use wheel bolts which are 5mm longer than stock. (That's a commonly available size.) There's plenty of room behind the front hub flange, so you could get away with using much longer bolts up front. In back, there's a clearance issue with the parking brake assembly, but the extra 2mm should not come in contact with anything.

Dave Zeckhausen
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post #6 of 22 Old 22nd October 2003, 06:58 AM Thread Starter
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Lightbulb Whers Greg--> We need scientific input...lol

Can you imagine what would happen if the Tire guy at some point in the future mixed up the bolts!

I wouldn't mind a counter-sunk F on the Front Lug Bolts...At a glance I could have peace of mind that they were all correct

Can i gat an ><>AMEN<><

By the way----->My Lugs are chromed>...?

Last edited by Ocean-Side M5; 22nd October 2003 at 06:58 AM.
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post #7 of 22 Old 22nd October 2003, 06:49 PM
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Sam,
I got my 3mm spacers and a set of 3mm longer lug bolts from luke at tire rack. He was familar with the mod, there was no questions about it (also ordered a set of 275/35 pilot sports (oe viper). The lug bolt heads were not black, but i painted them and they look fine.

Mike

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post #8 of 22 Old 22nd October 2003, 07:55 PM Thread Starter
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Thanks Motatti------------> I am having my wheels chromed needed to acquire not only longer, but Chromed as well. I have located a place in Huntington Beach Called PrestigeWheel

I will be calling them today to get prices.

Is there any tram-lining that you have experienced?
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post #9 of 22 Old 22nd October 2003, 08:06 PM
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Quote:
Originally posted by mottati
Sam,
I got my 3mm spacers and a set of 3mm longer lug bolts from luke at tire rack. He was familar with the mod, there was no questions about it (also ordered a set of 275/35 pilot sports (oe viper). The lug bolt heads were not black, but i painted them and they look fine.
I'm painting mine black as I write this. The smell from the first coat is permeating my office! Thanks for the inspiration.

Dave Zeckhausen
Owner, Zeckhausen Racing

2001 540i 6-Speed (Sold)
StopTech 4-wheel big brake upgrade (ST-60 front/ST-22 rear)
M5 3.15 Limited Slip Differential
M5 Front Swaybar
CDV Deleted (of course!)

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post #10 of 22 Old 22nd October 2003, 08:34 PM Thread Starter
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Unhappy

Dave-----------> I have measured the OEM lugs and I'm not sure if I'm doing it correctly. If i start at the bottom of the cone, I get 26 mm. The Only size Prestige has is 28mm and I'm not sure it will be enough. The next size they have is a 39 mm shank.

Can i get your expert measuring skill for a moment?
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