f355 converting to wheel studs

I prefer wheel studs for most of my cars for track usage. Would like to convert the f355 to wheel studs to make it easier to use spacers, does anyone have any suggestions for wheel studs for our cars?

thanks!

 

https://otisincla.com/product/otis-inc-la-m14x1-5-screw-in-hub-stud-w-inner-hex-62mm-shank-73mm-tl-black-zinc-copy/


these will work.

 

awesome, thanks!

 

So I was doing this as well and ordered the OEM challenge wheel studs since I also have the challenge wheels. I was pretty sure I had confirmed on here that they would work with the stock and optional drilled rotors and hats but when they went to get installed today, the guys are telling me that the studs aren’t threading in enough. Definitely not enough to be safe for road use. Attached is a photo they sent showing the standard bolt on the left and the black stud on the right that only threads about three spirals in. Can someone confirm of these actually do work with these rotors and hats?
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The "collar" on the challenge studs must be preventing them from threading in any further. Are the holes in your rotors big enough to acommodate that collar?

 

Will these work with challenge wheels or only the stock ones?

 

I think it’s a depth issue as it seems like they don’t screw in far enough to even reach the collar

 

The the threads are in the hub, not the rotor.

So the stud needs to pass through the rotor to reach the threads. If the hole in the rotors in not big enough for the collar, this is likely preventing the stud from being able to engage the threads...

The thread depth looks OK, given that it can reach the hub surface.

This is what it *should* look like once installed. The collar on the studs would be flush with the face of the rotor.

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I believe those are the challenge brakes. I thought this thread was specifically for converting the road car and brakes to studs from the lug bolts

 

It is - But if you are using the OEM challenge studs, you would need the same type of oversized holes in the rotors to accommodate them. I was just trying to troubleshoot and see why they were not fitting.

 

Those studs will not work with the standard rotors.
The challenge rotors are held onto the hubs with bolts (not the studs) so the position of the band is not correct for standard rotors.

The universal recommendation for threaded fasteners is that you need 5 threads engaged, which generally means you need 7 threads to allow for the chamfer at the top of the thread and the chamfer at the top of the hole. You do not have that in the picture--and as a result, it is not safe.

Your choice is to get different studs or use the challenge rotor-hats.

 

Perfect, thanks Mitch!

 

Be VERY careful! Going with studs is sometimes not safe at all. I'm a DIY guy and racers around me know it. One racer is a checkbook racer. We hit T8 at WSIR at 130mph going through the sweeper. He tells me he is getting some vibration and if I could take a look. Gladly I check out his car it looks fine. I take a front wheel off 2 studs come off with almost no torque with the acorn nuts well threaded on the studs. What happens is there is no way to lock the stud into the hub like a traditional stud pulled through the hub. Sometimes you can find a stud with a bump or "land" like the OP picture and that will lock the stud onto the hub so it won't back out once the stud is torqued. IF you use a smooth stud it can freely move in and out of the hub. You have NO way to determine if there is enough threads of stud into the hub especially after you have a couple on/off cycles at the track. While inconvenient it is way safer on ferrari's to just use the OEM bolts.