I am ordering Ace Executive wheels tomorrow for my 2002 UL. They are 20x8.5 in the front and 20x10 in the back. The wheels are cast monoblocks with a 38mm offset in front and 35mm in the rear. The retailer will order straight from the manufacturer, and the offsets can be milled to what I want.

Please give me your opinion as to what offsets I should order. I think I will leave the front at 38mm, I don't want to risk caliper clearance. In the rear, I want the most aggressive offset without any fender rubbing; I don't want to roll the fenders. I know they will rub with a 35mm offset, so I think I'll have them milled to 40mm. Does anyone know if a 38mm offset in back will work?

 

Even with +38 in the front, there might still be a chance of the wheel face rubbing with the calipers. That's why JDM wheels have different kinds of disk type. If u r planning to run 275 or 285 in the rear without any wheelwells modifications, go with +45 or high.

 

According to the manufacturer, the "out-of-the-box" offset of the wheel is 38mm, which clears the caliper. I do not know how much clearance there is, that is why I am hesitant to have the hub machined (which would bring the wheel face closer to the caliper). I will be running a 275 tire in the back.

 

Keep in mind that these are 1-piece cast monoblock wheels. They do not have different "disk" designs for the centers, like multipiece wheels. The wheel face/center clears the caliper straight out of the casting, with the hub initially milled to give the rim a 38mm offset. Additional milling of the mounting surface of the hub is the only way to change the offset to a more positive measurement, but the consequence is that the wheel face also moves closer to the caliper.

I believe that the most aggressive yet safe offset for the 20x10 rear with a 275 tire is around 40mm. I am trying to narrow it down to the millimeter where it will just barely clear the fender. I think a 45mm offset in the back will definitely not give me fender problems, but will also be quite conservative.