Wheel stud replacement problems

So in the middle of trying to replace studs on a 2003 tacoma. It has after market hubs with different size holes for studs.Whoever replaced the hub prior just halfway seated the studs and can't just get the right size now because the splines will be too small. Anyone have an idea of what size of drill bit I need to drill the stud holes to. Or does anyone have any other way of doing it. It will break the stud before it seats properly.

 

Pics might help

 

This is how far the splines will go in before it just completely stops

 

This one will just barely go in before it stops.

 

Take a look at this video, it’s for extended studs but the installation is the same for all studs.

https://m.youtube.com/watch?v=GjUo_EcbYrg

 

-i hammer stud on as best i can
-get 2 larger bolts and slide on the threaded side
-put washer on next
-use an open ended lug nut and tighten
-the torque from tightening lug will 'pull' the stud into place

 

Thanks for the video.This is the way I always do them but the oem size studs don't fit the new hub and will sheer long before they seat properly.

 

I have tried this method but the stud stops in place and will not seat any further because the holes on the hub are too small for the stock size studs.I would have just tried to find a smaller stud but then the splines will not hold because someone tried sinking the oem size splines in.My plan now is to get the mag drill out and drill the hub so the oem ones will seat. I was just kind of curious if anyone new what size the holes needed drilled out to.

 

Check this out: Installing (Extended) Wheel Studs on a Tacoma or 4Runner – AdventureTaco

From that, stock wheel studs are 40mm long, and M12x1.5 with a 14.20mm knurl. So, you're looking at something right around 14mm. What I'd do is get a stock wheel stud and use calipers to measure the diameter of the shoulder. When I measure my stock studs, they are 538 thousandths at the shoulder, just before the knurling.

 

Thank you I will look at that will have to pull one out of the freezer and let it warm up to check. Was hoping freezing them would give me enough to fit but no such luck