The Park Tool TSB-4 is the long awaited Truing Stand Base for the TS-4 Truing Stand. The TS-4 is the new flagship Truing Stand in the park lineup that was launched a while back. At launch, the base was missing which created a few issues to the size and weight of the TS-4. We consider this an absolute must if you are picking up a new TS-4. The molded, reinforced nylon construction includes several thoughtful storage bins, slotsa for common spoke wrenches, 20 degrees of forward or backward tilt. The TSB-4 can be surface mounted to your bench top as well thanks to strategically placed holes.