Dunlop Pneumatic Tyre Co Ltd v New Garage & Motor Co Ltd [1914] UKHL 1 is an English contract law case, concerning the extent to which damages may be sought for failure to perform of a contract when a sum is fixed in a contract. It held that only if a sum is of an unconscionable amount will it be considered penal and unenforceable. The legal standing of this case has been superseded by the Supreme Court's 2015 ruling in the combined cases of Cavendish Square Holding BV v Talal El Makdessi and ParkingEye Ltd v Beavis.