Park Tool's TSB-4. 2 Truing Stand Tilting Base holds the TS-4. 2 Professional Wheel Truing Stand for comfortable wheel work wherever we're at. It tilts 20-degrees from front to back for convenience, and it's host to a variety of features. A wide, sturdy base is made up of small parts compartments, spoke wrench holders, and it's constructed of durable composite material.