When are extend lugs needed? (1 Viewer)

[LX4x4]

I am about the install my wheels, which are +52 offset close to stock, I just have the regular conical lugs for aftermarket wheels.

Would I need to get extended lugs similar to these below (just a picture not necessary showing Toyota fitment) or are they only needed for aggressive offset wheels?

I will measure the OEM wheels how many threads is sticking out, but I cannot imagine how the Toyota wheels studs is not long enough to use standard lugs. Regarding thread engagement, how many turns of the lug nuts is considered OK vs not OK to use?

 

[doru]

There are three parts to this:
1. lug type - it depends on the wheel you use. Some aftermarket wheels do not use LC style lugs so you'll have to find the correct style for them.
2. lug depth - it depends on the wheel's hub you are using. But in general, if OEM length lugs are too short it means your wheel hub is too thin and so the wheel too weak to be used on LC.
3. the more interesting question is about the studs being long enough. The wheel offset doesn't matter as long as the hub is proper. When the offset comes in the discussion is when people add spacers on the hub to bring the actual offset in the correct range for LC. Then you may need new studs to make up for them unless you use a spacer with its own studs.

Minimum thread engagement is in general considered to be 5 full turns.

So, to answer your q more directly ... if you are using the right lug type for your wheels, you'll be probably fine with regular length lugs.

 

[skrypj]

You should have 1.5x the thread diameter in thread engagement. Meaning an M14 stud should have 21mm of engagement with the nut.

 

[skrypj]

There are three parts to this:
1. lug type - it depends on the wheel you use. Some aftermarket wheels do not use LC style lugs so you'll have to find the correct style for them.
2. lug depth - it depends on the wheel's hub you are using. But in general, if OEM length lugs are too short it means your wheel hub is too thin and so the wheel too weak to be used on LC.
3. the more interesting question is about the studs being long enough. The wheel offset doesn't matter as long as the hub is proper. When the offset comes in the discussion is when people add spacers on the hub to bring the actual offset in the correct range for LC. Then you may need new studs to make up for them unless you use a spacer with its own studs.

Minimum thread engagement is in general considered to be 5 full turns.

So, to answer your q more directly ... if you are using the right lug type for your wheels, you'll be probably fine with regular length lugs.

Are you sure its only 5 turns? That seems really low.

 

[doru]

That is a rule of thumb not scientific for minimum, not for optimal.

If you want it scientific it is 13.8 to 44.6mm depending on the class of the bolt and the carbon content of the steel used. Example 8.8 and low carbon steel it's 15mm.

To the OP, there are plenty of tables and formulas online to calculate exactly based on what lugs you are using. Inquire with vendor about the lug material first. Or easier, just count how many turns the OEM lugs have on the OEM wheels and compare to what you get with the aftermarket wheels and lugs.

 

[LX4x4]

Here is more data I found for an understanding of this problem. Just random notes , I apologize for any errors.

I found this post where a member measured the studs protrude from the brake rotor/ hub (front 24mm rear 27mm)

Aftermarket wheels with tapered/conical lug nuts - too little thread engagement?

To those with aftermarket wheels using conical lug nuts, how many turns does it take before the lug nut stops when turning by hand? I only have 5 turns in the front and around 7 and a half turns in the rear. Doesn't seem to be enough thread engagement in the front. It also doesn't look like an...

forum.ih8mud.com

I measured the wheel and it seems like I will have around 15mm to 16mm of stud to work with for the front, so, I do not need the kind of stud that extend towards the hub.

There are about 17 threads per inch on the M14x1.5 wheel stud, which means approx 1.49mm per turn. For example, if there was 15mm studs should be about 10 turns of the lug nut. Mcgard recommended 5 1/2 turn, which is not much (translates to about 8.2mm of stud length on a M14x1.5), but ideally, thread engagement at least as the diameter (14mm) of the stud is more ideal.

 

[grinchy]

I was alarmed at 5 turns and got ET lugs to get up to 9 or 10 turns.

 

[NYC570]

I was alarmed at 5 turns and got ET lugs to get up to 9 or 10 turns.

I thought about getting ET lugs but then read bad stories about them. I guess if they're torqued properly and one adheres to the tire rotation schedule, there won't be any issues

 

[grinchy]

I thought about getting ET lugs but then read bad stories about them. I guess if they're torqued properly and one adheres to the tire rotation schedule, there won't be any issues

Better than watching your wheel pass you on the freeway

 

[bloc]

Better than watching your wheel pass you on the freeway

That depends on your definition of adventure.

 

[TheComedian]

I was alarmed at 5 turns and got ET lugs to get up to 9 or 10 turns.

with these 5 turns you will reach already the maximum clamping power of your screw and thats what is what you need.
That for sure only counts if the stuff is 100% cleaned since grease and other stuff reduces your clamping strengh.

But… more =always better in this case since these 20 screws are everything we trust on while driving hehe