I was poking around last December looking of an "Economical" one piece wheel that would fit over a 394 mm ZR-1.
I saw Forgestars on a few cars and was checking them out. I called for info and I happen to call on the Black Friday sale. The normal price is still not bad but you get what you pay for. Finspeeds and Forgelines are works of art and these are OK for track wheels.
If I sell off enough used parts I will get a set of USA made mono blocks.
I did 18 x 10 with a 20 mm offset on the front and the caliper has about 5 mm clearance toward the spoke side. It has about 4 mm clearance to the barrel. Not sure you can increase offset and still have them clear the ZR-1 calipers.
Thanks Mark I ordered a set for track wheels. With only 5mm I am glad I didn't just take others advice. Even Forgestar said standard fitment for ZR1 brakes are 18x10 +30 offset and 18x12 +50 offset which would hit the calipers.
thanks for the updates Mark. Your explanations of why you make the changes/modifications are great. It gives us insight to your way of thinking that can benefit all of us.
The wheels look great with the yellow on the car!
__________________ Karl
1965 Chevrolet C10
1982 Chevrolet C10 - My son's Truck - Sunburn