Thule Tracker II Foot Packs. Designed to turn a factory rack into a dependable Thule load carrier. The Tracker II feet are designed to be used with Thule Load Bars. (sold separately. Choose from the Track II Foot Pack and Tracker II Half Pack w/ 2 TK1 Base Brackets. The Tracker II Foot Pack Part# 430 is the base and kit system to turn a weak factory rack into a dependable Thule load carrier. Set of four tracker II feet. Requires Thule TK1 Tracker II Base Bracket Kit (4 base brackets). The Tracker II Half Pack with 2 TK1 Base Brackets Part# 4302 is the base and kit system to turn a weak factory rack into a dependable Thule load carrier. Set of four feet and 2 TK1 base brackets. It has redesigned foot with Click-on/Click-off technology for maximum user-friendliness. Innovative kit system simplifies rack transfer between vehicles. Convenient push button release for rack removal. TK1 Base Brackets (4 base brackets) are designed for use with the 430 Tracker Feet. Part# TK1 is a set of 4 brackets and is designed for use with 430 Tracker II Feet. Kit system simplifies removal and transfer between vehicles. Convenient push button makes for quick and easy rack removal. Vehicle specific hardware provides best possible track fit. Locking option for the Tracker II Foot Packs includes the Thule One Key System lock cylinder (sold separately).