Here are some pro cons:
Apex ec7 wheel is used for true square swap wheel/tire to any corner. This really helps for track guys. You need spacers 25mm front. Apex is hub centric huge plus.
Forgestar makes specific offsets so no spacer needed but you can only rotate left to right. Forgestar also not hub centric. We raced vettes in scca banging curbs with no issues.
Spacers. Don't use unless you have to. They are ok. We race on them no problem.
Use only hubcentric spacers either slip on with long arp studs or type 2 spacer bolted to hub then wheel bolts to spacer with stock length studs.
I check wheel torque after every on track session. Wheels are often loose torque. That's why we retorque them. You cannot check type 2 spacer torque without removig wheel. That's a big hassle. But amazingly, I find the type 2 spacer not loosing torque but the wheel to spacer can loose torque. What is the physics of this I do not know. Maybe it has to do with direct wheel flex. I'm paranoid running type 2 spacers on track.
Slipon spacers you can check wheel spacer torque but you need long studs. The longer the stud the weaker. But you can check them. Makes me feel better on a track car.
Weight about equal because long stud about same as 2 short but there are extra bolts. So my guess slipon is less mass.
I would go slipon for track car.
Type 2 for occasional track duty mostly on streets where you want car looking good.
Apex ec7 wheel is used for true square swap wheel/tire to any corner. This really helps for track guys. You need spacers 25mm front. Apex is hub centric huge plus.
Forgestar makes specific offsets so no spacer needed but you can only rotate left to right. Forgestar also not hub centric. We raced vettes in scca banging curbs with no issues.
Spacers. Don't use unless you have to. They are ok. We race on them no problem.
Use only hubcentric spacers either slip on with long arp studs or type 2 spacer bolted to hub then wheel bolts to spacer with stock length studs.
I check wheel torque after every on track session. Wheels are often loose torque. That's why we retorque them. You cannot check type 2 spacer torque without removig wheel. That's a big hassle. But amazingly, I find the type 2 spacer not loosing torque but the wheel to spacer can loose torque. What is the physics of this I do not know. Maybe it has to do with direct wheel flex. I'm paranoid running type 2 spacers on track.
Slipon spacers you can check wheel spacer torque but you need long studs. The longer the stud the weaker. But you can check them. Makes me feel better on a track car.
Weight about equal because long stud about same as 2 short but there are extra bolts. So my guess slipon is less mass.
I would go slipon for track car.
Type 2 for occasional track duty mostly on streets where you want car looking good.