As I read this, Julian, the problem is not with the wheels or the original lug nuts, but with your desire (vanity?) to want to use the DTC 100810 center caps. How about somehow fabricating something to go around the smaller, original lug nuts, shimming them, to effectively make them "larger" so the center caps will stay in place?

You'd want whatever you use to be reasonably easy to remove so that you can remove the wheel when needed, but fit tightly enough to stay on at highway speeds. The first thing that comes to mind is short, maybe one-inch sections of PVC DWV pipe wrapped inside and outside with duct tape. The duct tape would give the resiliency needed to keep everything in place and the PVC pipe would provide the structural integrity.

I have no idea whether or not PVC pipe is commonly available in a size that would work, but the idea illustrates the concept. You could look around for other materials that might be the right size (the neck of a plastic soda bottle, perhaps?).

 

I appreciate your help but you are incorrect in your statement that the center caps are at all the issue here. The ANR4851 lugs supposedly go with the Terrafirma steel wheels. The center caps definitely go with the ANR4851 lug nuts. So no problem. This is not an example of using random incompatible parts on my truck, then dealing with the consequences. In my case all the parts involved are supposedly compatible with each other.

 

TF should be able to confirm which of the 3 types of lug nuts their wheels take. If they can’t then I’d never buy another rim from them if they can’t provide a simple answer/spec on their product.

The brand of the lug is entirely irrelevant. Lot’s of companies make lug nuts for the specific style a rim takes. 14x1.5 is not a difficult size to find. In fact If I’m not mistaken newer 6 lug GM vehicles are 14x1.5 so that shouldn’t be a problem at all with grabbing some off the shelf at say Discount Tire. They sell lug nuts for all kinds of applications steel/alloy wheels. With that being said you will find the correct lug nut for the wheel once you know the type it requires. However center cap wise = good luck.

 

Just an observation but you appear to have a lot of anti seize on your studs and rotors. That’s tempting to do I know but you’re using lug centric wheels now which I’m pretty sure very much rely on the clamping force and the resulting friction between the wheel and rotor to help keep it from moving. With the original hub centric wheel this shouldn’t matter as much because the hub helps hold it tight but with the new wheels it seems like the anti seize would take a lot of the friction away. You probably shouldn’t use anti seize on the stud threads either because they could loosen which I am guilty of too. I’m no expert but it makes sense to me.

Im surprised the big nuts don’t work though, they look to have the same 60 degree taper as the small ones

Now... I’m going to go double check my new steel wheels and aftermarket lug nuts I just bought and make very sure they are going to work before I get them mounted lol.

 

Thanks for your help. I really do appreciate it. Terrafirma has NOT responded to my 2 polite inquiries regarding which lug nuts go with these wheels. Iam not impressed with their lack of customer service and lack of support for their wheels. When I opened the boxes the tf wheels came in I expected to see a folded up piece of paper illustrating the proper installation techniques as well as specifics about the proper torque and lug nuts to use. But alas absolutely nothing at all. I will not give up on steel wheels, but iam dont with TF steel wheels. I dont have the money this minute for replacement wheels but I'm looking at all my options as this is my daily driver and my only truck.

Gonna see if I can borrow a friends alloy wheels to get me by for a few more weeks until I get replacement wheels. But not sure if that will go through.

And yes I did debate on the anti seize. That topic is as big and divided as is the topic of what oil is best in your vehicle. All I can say is that here in New England, wheels like to seize to the hubs and hubs have a tendency to rust out along with everything else. I figured I'd put the anti seize on as a precaution and hopefully to hold back the corrosion.

 

TF is horrible with any kind of documentation no doubt! I’ve used their bumpers, front skid plate, HD Steering, and lifts. Nothing comes with any type of parts breakdown or generic install sheet.

I have a few spare sets of OEM wheels/tires & I’d have loaned em to ya no problem if I was in the same area!