Yeah as Rob says , these were specifically designed for the GT86 so the fitment is perfect. In terms of downsides to fitting 19" wheels, I didnt notice many. Obviously the 35 profile tyre requires a bit more care and attention when it comes to potholes and kerbs, but the ride was fine even with the stiffer springs on mine. I think there's only been a handfull of folk who went with 19" wheels fitted to their 86/BRZ, Fensport being one of them (and if they think it's good enough who are we to argue!!??) They really do fill the arches well and make the car stand out. I'll PM you my number as I'm not going to be near a computer for the next day or 2. Cheers, Rab