There are degrees of "street friendly".
At 2.8 up front, I ate my PS2's up quite quickly on the inside ( ~ 6000 miles).
At my current 2.2 up front, not seeing much inside wear at ~ 7,000 miles (but there is inside wear occurring....)
2.2 keeps the outside wear on my track tires under control ( although 2.8 or more would be nice on the track).
2011 e92 M3 Monte Carlo Blue ESS 535
2010 Honda FIT
2006 SLK 55 AMG