Originally Posted by Improbus
While I haven't seen any proof of this yet as well, many mechanics preach about low offset ruining wheel bearings. ET30 isn't that low honestly. From my mechanic he said you would need to stray into the ET20 and lower to start causing bad geometry problems.
But in regards to the OP. Run Staggered if you want to. Take the advice of the posters with regards to rolling Diameter but be aware it may cost you down the road it may not. With cars you need to weigh out all the possibilities.
The consensus on here is anything under et40.
My last 2 setups were 17x9 +10 and 18x9.5 +19.