Just going by the pictures, 1st and 3rd above, aluminum and Ti seem to weigh the same.?

I guess it's hard to see in the pics but the open Ti. are the slightest bit lighter than the taller closed Al. The difference is an oz. or less. I need to get a new digital scale.

Bill,

Do you need to have open lug nuts for DE? If required - or if you just WANT open lug nuts, what material is allowable - steel, titanium, or aluminum?

thanks!

angela

No, For DE many, maybe most(just going by what we see going through the morning Tech line) use the stock closed end Al. ones, some use steel and some use Ti.

In Club racing there is a specific requirement
from the 2016 PCA Club racing Rule book
"Lugnuts must be steel with engagement at least equal to the diameter of the wheel lug studs"

The best reason for titanium lug nuts is the "coolness" factor if that is important to you. The weight saving is inconsequential.

Titanium lug nuts aren't a great choice for racing for several factors which include notch sensitivity and galling. You would want to replace these lug nuts on a regular basis. Far more often they you would replace steel lug nuts. If you have a large budget for racing and can afford to replace the Ti lug nuts often, I guess they aren't a bad choice to save a small amount of rotating weight.

For street use, you can add galvanic corrosion to the list of potential problems.

For the street, I would prefer the stock aluminum nuts and for the track I would use steel.

Oh, and the galling issue is not just related to the Ti nut themselves. The galling damages the studs as well. So you might need to replace the studs more often too.

Here is what I use on the race car:

http://forums.pelicanparts.com/uploa...1459205515.jpg

They are hardened steel racing lug nuts with a black oxide finish.

I bought these from:

Track-Studs.com - Racing Wheel Studs and Lug Nuts, Competition Grade — Track-Studs.com