So I thought I'd give you guys an update on these: I've had them on the BRZ since November 2013 and at first they were fine, but now I have a job in the city which I need my car for, so I'm in peak hour traffic, doing slow stop-start driving.
At first, i thought it was great, but while the wheels are fine, combining that size with sticky rubber wasn't that smart. They're noisy as hell, the ride is hard because the AD08R's have steel flippers in the side wall and they're very low profile, and worst of all... the rolling resistance is brutal at stock power/torque, so any time you take your foot off the throttle, it lurches forward and drags itself to a halt. Taking off is even worse.
For an experiment, I changed back to the stocker wheels and tyres (removed them two hours after delivery, so they're essentially 'new') and it feels like a new car. You can feel the lack of grip, but it drives *so* much better. It feels more natural, it turns in much easier, there's less tram-tracking, there's way less noise and the ride is more comfortable without giving up much on handling... it's just the overall grip that loses out.
Maybe it works for some people with big rubber and that's fine, but it's not for me. Lesson learned.
Anyone in Brisbane Australia want to buy some Enkei Tenjins?