The 502 VT-Spec Wheel was developed for the Factory Subaru Rally Team that’s overseen by Vermont Sports car. Think of it as the 15 in. version of the Rally wheel version. Some other key differences are the stainless steel lug hold inserts for increased durability in race environments. The VT-Spec also has a higher load rating of 2100 lbs. Unlike the Rally wheels, the VT-Spec will not clear OEM Subaru STI brakes, but will clear Subaru WRX 4-pot brakes up to 2014, AP Racing CP6720 calipers and most brake packages with rotors up to 300mm in diameter.