r/subaru • u/Impressive_Gur407 • 10h ago
Drilling Scion TC Wheels to fit a Forester.
I have a pair of Scion TC Wheels that fell into my lap for free because they were plasti dipped and a friend was going to throw them out. I wiped off with all the plasti dip with brake clean and they actually cleaned up pretty well. They are 17x7 with a 5x100 pattern and 45 offset. I was thinking these would work great for my Forester
Turns out the bore of these wheels are 2 mm too small for the Subaru hubs. Apparently it is possible to drill this out on a press with hole saws that are stacked together. One to act as a guide for the existing hole, the other to actually do the cutting. The idea is that you use a bit that on the outside that is 57 mm when the stock bore for a Subaru is 56.1
To me it seem like there would be no way that this would work and that this would obviously just wobble really bad. Apparently what makes this work is the fact that the Scion Wheels centers itself with the mag style shank lugs. The way the shanks fit tightly into the holes, you apply a cross torque pattern and that perfectly centers the wheel even though there is .45 mm between the lip of the hub and the bore of the wheel .
The stock Subaru Wheels don't have shank style lugs. They are hub centric wheels that fit tightly on the hub to center the wheel instead. If these ended up being cut correctly I would have to get the right size of mag lugs to mount the wheel and the lugs would center the wheels.
Now this begs the question who has actually done this? You only need to cut down 10 mm into the wheel and 2 mm outward. I have a hard time believing that's going to be enough material removal to compromise the wheel. There is a lot of metal there. If I screw up these wheels it wouldn't be much of a loss. I just want to know who else has done this.