Sorry for any confusion, probably didn’t proof read my post somewhere along the line. Then again, the post's that I was quoting and contradicting seem to have been "deleted" which in my opinion is a bit shady, but also probably makes it a little difficult to follow.
Prior to purchasing any spacer I pulled the wheel off of my truck and I checked the hub on the truck and hub bore on the wheel. This was done with my personal digital caliper. I don’t have the exact readouts, but both readings were the same. They were both above 78, but less than 78.1. Based on those readings being closer to 78.1 than 77.8 I felt comfortable enough to purchase the Yitamotor spacers to at the very least test out.
Upon receiving the spacers, I again used my personal digital caliper to take measurements, this time of the actual spacer bore and hub. Both readings on those spacers were exact at 78 flat. I personally felt safe to install the spacers with the difference between all of the OEM parts and the spacers being <.1 difference.
I ran the spacers for ~1 week and about 220 miles I believe, and removed the wheels to re-check the torque, and everything came back tight and within torque specs.
Yesterday, after posts saying that information that I and others were pushing was incorrect, unsafe, etc. I decided to be thorough and re-verify everything utilizing different equipment so to ensure that my caliper readings weren't off, and that I wasn't making some sort of mistake. To reiterate from one of those previous posts, I work with aviation mechanics (I am a flight examiner/instructor pilot so work hand in hand with my mechs). I was able to have one of the mechs assist me and pull measurements. We both checked all hub connection points: hub on the truck, the hub bore on the spacer, the hub on the spacer, and the hub bore on the wheel. This was utilizing their measurement equipment, which requires a fairly rigorous calibration standard/inspection window since it is used regularly on planes. During this check, all of the values previously found came back the same, or within .03-.05 of what I was getting from my personal calipers. Regardless, the values for all components read in a range between 78 and <78.1. Now, this mech isn't an automotive mechanic, but the fundamental's are still the same. His two cents were that it was logical that the Yitamotor spacers listed for 78.1 were closer and should provide a tighter fit compared to the other brands which listed the hubs at 77.8. He also said that my logic followed that a 77.8 hub would produce a looser connection in the components, and should theoretically create an increased possibility of extra stress on studs.
Now, I want to reiterate this: If you want to go with a spacer that is listed at 77.8, I completely understand because that is the spec listed from RAM and admittedly most sources have that listed. This thread originally sparked my curiosity to investigate further before I purchased any spacers, and the values I came up with tend to contradict the hub bore being at 77.8, as everything seemed to line up much closer to 78.1. For me, the Yitamotor spacers I purchased happen to be less expensive than the BORA and Coyote spacers, but the money difference between all of the options was not a concern. My concern was for that of myself, my passengers, and the expensive investment that is my truck, and made the $60-$100 price difference a non-factor personally. Based of my results, I am willing to say that I think the Yitamotor is a viable option, but NO ONE SHOULD TAKE ME AT MY WORD because I am just some guy posting on a forum. The best thing anyone can do is gather as much information as they can, be willing to investigate as far as they can on their own, take their own measurements and readings, and make the best decision possible from there. I am just trying to be thorough and spread as much info about my personal experiences and findings to help people out so they can make those good decisions. What irks me is that another poster is using promoting specific brands with specific links, using typical marketing style catch phrases and slogans, and adding check marks, red X's, bold print's and colored words, and diagrams from the spacer manufacturers all in an obvious attempt to catch people's eyes and earn their business... meanwhile calling into question my integrity and/or sensibility while not being able to provide any information to counter otherwise... and then deleting multiple posts from this very thread... if it smells like crap, looks like crap, chances are it's crap. To each their own. I again suggest that everyone does as much research and investigation as they can on their own. I didn't take anyone's word, and in that same respect, no one should accept mine either. I can tell you this, though, I'm willing to stand behind what info i'm putting out and won't be deleting my posts.
