These Strange Pro Race steel front brake kits offer a tremendous weight savings over OEM brake components. The entire 4-piston brake kits, complete with bearings, hubs, rotors, pads, calipers, etc., weigh only 33.5 lbs. They are unsurpassed in detail, as is evident in the hub design. Each hub has one bolt circle. Instead of adding an additional bolt circle, Strange machined five large lightening holes to reduce rotating weight. The billet aluminum hub is further lightened by its scalloped design and fully machined billet aluminum hubcap.