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M3 Track: Racing and DE Best mod for speed is learning to get the most out of what you currently have. Tracks and DE's is the place to start!


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Old Sun, Jun-09-2019, 05:46:32 PM   #41
SQ13
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Default Re: Wheel Stud Life Span?

I feel like M14 hardware would be more durable. Is it possible to something like Apex M14 stud kit after modifying the hub?
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Old Mon, Jun-10-2019, 01:25:22 AM   #42
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Default Re: Wheel Stud Life Span?

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Originally Posted by aeronaut View Post
Interesting. I've found that a torque stick is pretty inconsistent. Ie, use torque stick, then torque wrench, and there's a few that are always way off, sometimes over.

Good point on the rears. But....counter arguments:
- properly torqued studs should see very little shear.
- front tires typically see more longitudinal G's than rear ?
- more slip angle (ie sliding) at some point is lower G.

But, I also could be probably wrong. lol

I honestly don't think it's the G's/driving that fatique these. It's the heat cycles.

My torque stick is 85 ft lbs +/- 3lbs. It’s been so consistent that I’ve stop checking with a torque wrench. I also use a battery impact that maxes out around 100 ft lbs, not sure if that makes a difference.


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Old Mon, Jun-10-2019, 01:35:41 AM   #43
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Default Re: Wheel Stud Life Span?

If we’re polling here, I change mine out after two years. That’s probably 12 events for me. I will change them again after 2020 season. I only torque/check mine in the mornings as well. I like the idea of setting the wrench 5 lbs. under. Think I’ll try that. I use the Apex brand.
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Old Mon, Jun-10-2019, 01:46:48 AM   #44
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Default Re: Wheel Stud Life Span?

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Originally Posted by SQ13 View Post
I feel like M14 hardware would be more durable. Is it possible to something like Apex M14 stud kit after modifying the hub?
M14 is certainly more reliable. Just have to cut the hubs and re tap them for M14. ITs on my list of things to think about / have a shop do that has a jig to drill them correctly.
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Old Mon, Jun-10-2019, 05:11:59 AM   #45
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Default Re: Wheel Stud Life Span?

For what it's worth, I've now broken 11 studs. Only two of those were on the front.
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Old Mon, Jun-10-2019, 03:14:11 PM   #46
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Default Re: Wheel Stud Life Span?

I have been changing mine out every 12 events give or take with Bimmerworlds studs. A few friends had some issues with a batch not too long ago, so I now am running wheel studs from MSI. These guys are the manufacturer supplier for Nascar. I hope they have their heat treat on point. Life span would be based on number of events and number of time wheels are on and off. It is the stretching that occurs when swapping and tq the studs that really wears them down.
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Old Mon, Jun-10-2019, 05:39:33 PM   #47
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Default Re: Wheel Stud Life Span?

Broke my first wheel stud this weekend at Road America, thankfully there was more than enough members of the community willing to help me drill it out and replace it.

Was talking with a guy who had his hub's redrilled for m14 and said he never has to replace them, he's done about 10k miles around Road America in his m3, full cage/aero, slicks etc.

Also everyone I talked to highly recommends using MSI wheel studs, they're the guys who make them for IMSA, NASCAR etc.
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Old Mon, Jun-10-2019, 05:41:27 PM   #48
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Default Re: Wheel Stud Life Span?

The MSI source is good intel.

I replace front wheel bearings once a year (at least the left one anyway), so it'd be a PIA to refit to 14mm everytime.
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Old Mon, Jun-10-2019, 05:41:44 PM   #49
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Default Re: Wheel Stud Life Span?

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Originally Posted by JaySpillz View Post
Also everyone I talked to highly recommends using MSI wheel studs, they're the guys who make them for IMSA, NASCAR etc.

Ive been hearing more mentions about MSI too. I think they want something like $300+ for a set? If they’re lifetime then he’ll yeah. If not...kind of a waste.



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Old Mon, Jun-10-2019, 05:47:11 PM   #50
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Default Re: Wheel Stud Life Span?

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Originally Posted by bigjae1976 View Post
Ive been hearing more mentions about MSI too. I think they want something like $300+ for a set? If they’re lifetime then he’ll yeah. If not...kind of a waste.



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Well, I can't find prices on their web site, so yea, that's not a great sign.

I doubt any 12mm stud would last a 'lifetime' of hard track use.
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Discussing Wheel Stud Life Span? in the M3 Track: Racing and DE Forum - Best mod for speed is learning to get the most out of what you currently have. Tracks and DE's is the place to start! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)