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      09-27-2015, 12:10 AM   #1
M3 Number 86
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I have been using 7mm stud kits with a 5mm spacer and there was plenty of thread left.

today I slapped on some 10mm spacers because of nt01 rubbing on kw cs perch (weird just driver side rubs on spring) before moving to shorter and stiffer springs.

I see all 75mm kits mention that they can accomodate up to 10mm spacer but when I torque the nut down you can't see any thread leftover.

should I be moving up to 90mm studs? may do it just to be safe but wondering on your guys' experience.

thanks!

(I have many stupid questions posted and thanks for all the help. I'm just the driver - I need a pit crew for car technical stuff lol)
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      09-27-2015, 12:49 AM   #2
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75mm studs are designed to handle up to a 12mm spacer. Even track guys run 12mm on 75mm kits with no issues. You should be fine unless you want to upgrade for aesthetic reasons.
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      09-27-2015, 01:10 AM   #3
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Quote:
Originally Posted by kevin///mlee View Post
75mm studs are designed to handle up to a 12mm spacer. Even track guys run 12mm on 75mm kits with no issues. You should be fine unless you want to upgrade for aesthetic reasons.
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      09-27-2015, 03:57 AM   #4
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ok - was just wondering about having enough threads to work with to secure wheel.

if my wheels fall off at track I'm blaming you two.
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      09-27-2015, 10:40 AM   #5
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If they do its because you didn't torque wheels or you drive so fast the wheels couldn't take it anymore
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      09-27-2015, 03:21 PM   #6
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Quote:
Originally Posted by 1MOREMOD
If they do its because you didn't torque wheels or you drive so fast the wheels couldn't take it anymore
I'm too fast. time to sell.
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      09-28-2015, 01:36 AM   #7
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In aviation all bolts should show between 1 and 3 threads out of the nut. Wheel lugs are different than aircraft bolts but the minimum number may still apply. I am not sure.
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      09-28-2015, 01:33 PM   #8
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As Kevin mentioned, 75mm extended stud kits will provide you with enough threading to properly and safely install up to 12.5mm spacers. If a customer wants to run 15mm spacers or larger, we move them to our 90mm extended stud kits.

- Ryan
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      09-28-2015, 01:45 PM   #9
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Quote:
Originally Posted by ApexRaceParts
As Kevin mentioned, 75mm extended stud kits will provide you with enough threading to properly and safely install up to 12.5mm spacers. If a customer wants to run 15mm spacers or larger, we move them to our 90mm extended stud kits.

- Ryan
and no threads shown outside the nut is ok?
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      09-28-2015, 06:01 PM   #10
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The length sounds right but how old are they? I don't run my studs more than two seasons, even on a light car. I've seen too many broken studs on the track, in the pits, and in the paddock.
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      09-28-2015, 06:02 PM   #11
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Quote:
Originally Posted by WarrantyTracker View Post
The length sounds right but how old are they? I don't run my studs more than two seasons, even on a light car. I've seen too many broken studs on the track, in the pits, and in the paddock.
they were just replaced not too long back. I change every year. Perhaps the next time I will just get the longer kit.
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      09-28-2015, 07:52 PM   #12
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Yes I've heard longer is better.
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      09-28-2015, 08:44 PM   #13
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Quote:
Originally Posted by 1MOREMOD View Post
Yes I've heard longer is better.
only if it's fatter for sure.
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      09-28-2015, 11:23 PM   #14
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I always install 90mm studs because you never know when you might be running a different setup in a pinch.
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      09-28-2015, 11:59 PM   #15
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Quote:
Originally Posted by M3 Number 86 View Post
only if it's fatter for sure.
I can yank on it and it gets longer but afraid to hit it with a hammer to make it fatter.
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      09-29-2015, 12:15 AM   #16
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Quote:
Originally Posted by Greg S
I always install 90mm studs because you never know when you might be running a different setup in a pinch.
Yeah that's a good thought. I'm buying 90mm next time. must consult the pros who work on my car.
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      09-29-2015, 12:33 AM   #17
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Well then don't use a spacer you vain bastard! You gonna stretch and poke that baby too?
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      09-29-2015, 03:37 AM   #18
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Quote:
Originally Posted by 1MOREMOD
Well then don't use a spacer you vain bastard! You gonna stretch and poke that baby too?
Nt01 rub against the spring and perch on my kw cs. until I up my spring rates I'm a use a spacer
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      12-06-2017, 05:45 PM   #19
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Resurrecting instead of making a new thread...but does anyone run with ECS Tuning studs? My car only sees light track use, and they are priced right it looks like....I saw most use Apex or Turner. I would like to get an opinion before I choose though
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      12-06-2017, 09:44 PM   #20
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I've seen every brand break so far, including my BW Race studs. With that said I bought a new set of the same ones, and now don't let anybody remove/install wheels on the car.
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      12-06-2017, 10:02 PM   #21
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I just bought some studs. I have bought some others before. One set was cheap though sold by a race shop and they started loosening up and one broke. I started buying better ones after that. For the past few years I have bought from Apex I think theirs are TUV approved. Have not broken any since but I tend to replace them every few years now.
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      12-06-2017, 10:48 PM   #22
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Quote:
Originally Posted by pbonsalb View Post
I just bought some studs. I have bought some others before. One set was cheap though sold by a race shop and they started loosening up and one broke. I started buying better ones after that. For the past few years I have bought from Apex I think theirs are TUV approved. Have not broken any since but I tend to replace them every few years now.
I have heard about a lot of Apex studs breaking, but like was said above, all will of the brands break, especially if not torqued properly or replaced at appropriate (depending on use) intervals. I guess that's common sense though.

I know someone that broke 4 bolts (not studs) going up the esses at Watkins Glen once. He was able to stop with one left, just before his wheel fell off...
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