Here is a shot of the front uprights. Notice they are hollow. That is so air can flow through the upright to cool the rotors. That is a trick we took from F1. The bearings we are using are from a Lexus. They are double row angular contact bearings--the BEST choice for wheel bearings. Notice how in the top of the picture you can see we held the rod ends (where the control arms connect to the upright) in DOUBLE shear. That makes for a light and very strong part. The engineering was very, very hard, however, to get it all to package into a 15 inch wheel.
In the picture, the left side of the upright is solid--that is where the brake loads are carried in the upright.
