 Since the formation of IndyCar Series in 1996, the brake package of IndyCar Series was only slimmer carbon brake rotors with 4-pot brake calipers and carbon pads on all-oval races until 2011.The thicker steel brake rotors with 6-pot brake calipers and carbon pads were introduced in 2005 for road and street course races for stronger braking while approaching sharper turns even hairpins.From 2012 onwards, IndyCar Series ditched the steel brake discs in favor of carbon brake rotors in all types of tracks but the caliper configuration remained the same as 1996–2011.