I bought a sets of TE37 18x10.5 +15.

Everything is ok when I driving normal, but when I try to make a fast turn or crossing those speed bumps. My tire is running my rear bumper.

Is there anyone have a same issue as me, what can I do? Cut the rear bumper a little bit?

Tire is V12 275/30/18

uhhh.....roll and pull the fender....

fender rolled and pulled... All clear, only rubbing the rear bumper.

You must use certain technical terms differently from most, because if one of my tires actually hit what is usually meant by "rear bumper," the only explanation would be a serious off.

yes, I'm hoping we mean fender liner...

Yeah, but I still can't see how the first point of contact is a rear tire. A front tire will be all over a fender liner when steered long before a rear tire hits anything.