I just got with a very helpful (as usual) Tire Rack CS representative to get some more info on these wheels.
He confirmed that they are ET45 for both 17x8 and 17x9.
They are low pressure cast (same as OEM wheels).
He wasn't able to give me a weight but the TRM C2 (17x8.5 low pressure cast) are 19lbs. The C2 is similar in style as well so I'm expecting the C4 17x8 to be 17-18lbs.
|