Join Date: Jun 2015
Location: Guadalajara, Mexico
Car Year: 2017
Car Model: Subaru Forester XS
Feedback Score: 0 reviews
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I installed 1" lift spacers on front and rear shocks for wheel / ground clearance. I think 1" lift is the minimum if you decide to go with 235/75r15. Unintended consequence of lift is my rear camber actually got better.2) Rubbing avoidance
For potential rubbing, I pushed out fender liners with heat gun and hammer. Low offset of the wheel (+15mm) helps a lot, but if you don't modify liner, there will be some rubbing at front wheel when turning.3) TPMS
My research on Forester TPMS wasn't completed so I ordered wheel/tire mounted and balanced san TPMS.4) Wheel center cap
Glad that I skipped TPMS when I ordered as it turned out TPMS is major headache for Subarus when you swap out wheels.
I concluded that the most reasonable solution is to clone the sensors so that you don't have to go to dealer to have the system 'relearn' the new IDs every time you swap out wheels.
I went with Autel MX 315MHz sensors with metal stem ($25 each eBay/amazon). I also purchased Autel TPMS tool TS408 ($112 eBay) for cloning. (Cheaper Autel tool exists (called MaxiPAD $50 off ebay), but there are some unconfirmed reports that it can't read OEM Subaru sensors inside wheel).
I installed these sensors myself after local tire shops quoted $86 + tax for just installation/rebalancing. I also didn't want to haul the tires all the way to the shop and back. DIY TPMS installation involved breaking bead only on TPMS side, removing old valve stem, sliding/screwing in new sensor, reseating tire, and rebalancing.
For rebalance, I measured weight difference between old rubber stem and new Autel MX TPMS sensors. The difference was 0.77 oz, which is basically three 1/4 oz balance weight. Using some arithmetic and basic trigonometry, I moved around a few weights to compensate the 0.77 oz difference. I ended up using net zero weight for all four wheels.
The most difficult part of DIY TPMS installation was seating the tire. The rim has very tight space inside, so the installed TPMS module prevents the bead of tire ever so slightly from touching the seat of the rim. I solved this problem by using L-shaped paintless dent-removal hook to get the bead over the TPMS making initial seal. Because of this I spent about an hour for the first wheel. But once I learned the trick, it took 10 minutes each for the rests.
If I had known all these, I would have asked Discount Tires about these MX sensors when I ordered wheel/tire set.
I've been reading that these racing wheels don't have ridge for center caps, so you have to fashion some kind of adapter to put center cap in place.
But upon receiving the wheels, I noticed that there is clearly a ring intended for center cap. I don't know if the design has changed, but the stock 60mm diameter Subaru plastic center cap goes straight in and secures perfectly.
So I bought and installed black 60mm center caps with Subaru logo from eBay (~$15).