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I may purchase a 991.2 GT3RS with PCCB. I was running 19" wheels on my 991.1 GT3. I was wondering if it is possible. It currently has 21" rear and 20" fronts.
As mentioned, forge line wheels were clear. I have them and I run them on the track no problem. The rears will clear without problem and the fronts will be super tight with potential scoring of the inner wheel if a rock or something else gets lodged between the caliper and wheel. You should have no worries either way and feel confident running them.
Here's mine, running Perelli 275/675/19 Front and 315/705/19 rear. These are nearly the same diameter as the stock tires and only slighter narrower.
I am running an AP Racing brake kit that is a better fit up front due to slightly smaller diameter rotors.
Lots of customers running this on 19s. You can actually clear 19" wheels with PFC 405 kit even.
Please also note that PFC offers an "S" and an "R" caliper. The "S" caliper clears OEM 991 GT3/RS wheels. The "R" caliper needs either a 6-7mm wheel spacer to clear the spokes or aftermarket wheels such as Forgelines...I'm a dealer for both if you have any questions.
You can actually clear 18" wheels with PFC 380 kit.
Front - Yes.
Rear - Not exactly, because while the 18"s will clear the brakes themselves, they won't clear the rear suspension upright of a GT road car. 19"s barely clears even with shallow head bolts.
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PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
Front - Yes.
Rear - Not exactly, because while the 18"s will clear the brakes themselves, they won't clear the rear suspension upright of a GT road car. 19"s barely clears even with shallow head bolts.
Yes whoops, Tom is correct, that was posted in haste. The 18's only work for the GT4/RS/Clubsport models or 991 GT3 Cup. Rear wheel steer models affect the clearance to the wheel as well. On a 19" wheel there should be close to 20mm of caliper-to-wheel barrel clearance with the PFC 380 kit.
Last edited by Hinz Motorsport; 12-15-2022 at 04:15 PM.
12-11-2022 | 07:00 PM
