Please please please dont use a conical bolt on those........your putting a hell of a shear load on the studs......35mm on each one. Simple solution is to use like i have offseting wheel bolts......horribly knkwn as wobble bolts. They are absolutely fine and will take the .35mm offset without putting shear loads on the studs.....also make sure you do get the correct size spigot rings.
Mismatch, even that small of a one is a bad idea. It will require each stud to "bend" as you torque up the nuts, and since hardened studs don't bend, it is likely to result in some broken studs. Really bad idea!
Read this thread:
http://www.cadillacforums.com/forum...012/253334-114-3mm-fit-115mm.html#post2880388
There are many others like it around the interweb. Some people do and get away with it. Others don't.
Oddly, people who've had a wheel fall off and died in the resulting crash, don't post all that often. Wonder why?
No advice here.... just some facts.
[1] 0.7mm = 0.028" (and 1/2 of that - which is the actual offset at each stud - is actually ony 0.014"). This is NOT an absolute, as there is a mfg tolerance which needs to be accounted for.
[2] You will need to determine how accurate (consistency) each hub is by actual measurements to know the tolerance in each wheel under manufacturing acceptance. This will give you a snse for the actual expected delta between the hubs stud rig and the wheels bolt hole ring.
[3] You'll also have to check the tolerance in he wheel mfg itself.
[4] You'll need to know the material stength to compare to the calculate loaded force stress value for the worst-case mismatch in the concentricty between the hub and wheel.
[5] Finally... you can calualte the stress induced at each stud. Be sure to dd back in the stress taken away by using the hub centric ring (so you'll need to know that too).
[6] now apply that to the calculated force expected on the "worst-case" cornering
Use:
As = P/A = P /(Pi*Db^2/4)
As = Average Shear
Db = Diameter of bolt (Minor Dia)
P = Load
And you'll have to calculate it to the force applied as the deflection of the stud (about 1/2 degree WCI) so AS * tan(<WCI)
... all this is really long to say this:
Is it "safe"? Well.... depend on the load being applied. The stud is there to hold the wheel "ON", and the hub - when fitted properly to the wheel (concentricity) minimizes the load de to vibration. So if you "race", expect MUCH GREATER stresses to be applied. For around town driving and low speed highway (like under 90 MPH), then the stress is propably negligable when properly mounted (using hub-centric rings) and torqued. But - there is some variablity due to the tolerances in manufacturing. That is accounted for by the mechanical engineers (and testing) to insure that such tiny (but acceptable) tolerance can be overcome. So - in essence - there is a engineered acceptble level of stress which can be tolerated.
Now.... it's up to you to find out exactly what that is. Like I said - the delta between 114.5mm and 115mm rings is .35mm at the stud it self (or 0.014"). What tolerance did you measure in your hubs?
