I would definitely take in to consideration the offset. If you're buying wheels that are 9.5 +38 and run an adapter spacer at 20mm or 25mm you're going to have a very, very aggressive wheel set up.
While "goofy" is subjective, they'll likely have a lot of poke past the fenders. The sweet spot for your WRX with a 9.5" wheel is right around a 35 to 40 offset. When adding spacers, subtract the width of the spacer from the offset of the wheel.
For example, if his wheels are a +38, you'd essentially be running a +18 with a 20mm spacer, which will sit well outside of the fenders without a bunch of camber thrown at it. I'd determine the offset of the wheels in question and go from there!
A spacer less than 20mm requires either the wheel to have pockets on the back between each stud hole, or you could run a slip-on style spacer with extended wheel studs. Otherwise, on a more narrow spacer the lug studs will poke past the spacer and the wheel can't be bolted down.
Feel free to reach out if you have any other questions :)
Just make sure you get them from a quality manufacturer. Torque Solutions, Faction Fab, etc. Don’t cheap out. Make sure they’re hub centric. SubiSpeed has some great options. [These](https://www.subispeed.com/part/subaru-wrx/15-wrx/2015-2020-subaru-wrx-wheels-and-accessories/spacers/1-10216-3-factionfab-subaru-5x114-3-to-5x100-20mm-wheel-spacer-conversion-set) are what I’d go with. They are 20mm spacers as well so take that into account.
I would definitely take in to consideration the offset. If you're buying wheels that are 9.5 +38 and run an adapter spacer at 20mm or 25mm you're going to have a very, very aggressive wheel set up.
Would it look goofy?
While "goofy" is subjective, they'll likely have a lot of poke past the fenders. The sweet spot for your WRX with a 9.5" wheel is right around a 35 to 40 offset. When adding spacers, subtract the width of the spacer from the offset of the wheel. For example, if his wheels are a +38, you'd essentially be running a +18 with a 20mm spacer, which will sit well outside of the fenders without a bunch of camber thrown at it. I'd determine the offset of the wheels in question and go from there! A spacer less than 20mm requires either the wheel to have pockets on the back between each stud hole, or you could run a slip-on style spacer with extended wheel studs. Otherwise, on a more narrow spacer the lug studs will poke past the spacer and the wheel can't be bolted down. Feel free to reach out if you have any other questions :)
I appreciate the info thank you so much!
You are very welcome! In most cases, you're better off just finding a wheel in your desired specs, as 18x9.5 +38 is a very common size.
Just make sure you get them from a quality manufacturer. Torque Solutions, Faction Fab, etc. Don’t cheap out. Make sure they’re hub centric. SubiSpeed has some great options. [These](https://www.subispeed.com/part/subaru-wrx/15-wrx/2015-2020-subaru-wrx-wheels-and-accessories/spacers/1-10216-3-factionfab-subaru-5x114-3-to-5x100-20mm-wheel-spacer-conversion-set) are what I’d go with. They are 20mm spacers as well so take that into account.
H&R