UPDATE:
A board member contacted me with some concerns about the front wheels supposedly being +35 offset. He stated that the ZL1 front offsets are +23 for 20x10, and an offset of +35 might not clear the OEM shocks with a 295/35-19 tire. I felt that this warranted some investigation on my part.
So, here's a bit of explanation and some interesting information that I just found out:
When I ordered these wheels, I requested offsets that would allow me to fit 295/35-19 tires in the front on a 19x10 wheel.
Later on, after I received the wheels and went to sell them, I sent an email to Jurrian asking him what offsets were chosen for the wheels. Potential buyers had been asking me what the offsets were, and I wanted to be able to give them an answer. Jurrian replied that the wheels were
probably no different than the usual, which is +35 front and +39 rear.
Now, I just took one of the 19x10 wheels out of the box and began measuring the wheel. Here's what I found:
- From the outside of the outer lip to the outside of the inner lip is 275mm (10.82").
- From the inside of the outer lip to the inside of the inner lip is 254mm (10.00").
- From the inside of the outer lip to the outside of the inner lip is 265mm (10.43").
- From the mounting surface to the outside of the inner lip is 165mm (6.49").
- Subtract 10" (the actual wheel width) from 10.43" and you get 0.43", which is the width of the inner lip.
- Subtract the inner lip width, 0.43", from 6.49". As the wheel is 10" wide inside of the outer and inner lips, subtract half of that width from 6.09" to get the distance that the mounting surface is offset from the centerline of the wheel.
- The offset would be 6.09" - 5.00", which is 1.09". That converts to 27.69mm offset.
Obviously, there is some margin of error here. However, it is quite apparent to me that the offsets of these front wheels are more akin to the ZL1 front offset of +23.