Park Tool TS-2EXT. 3 Upright Extensions The Park Tool TS-2EXT. 3 Upright Extensions install in seconds on any TS-2 or TS-2. 2 Truing Stand, allowing the stand to be used on wheels with hubs up to 200mm wide (tandem, fat and downhill bikes), as well as on wheels with a 29" mountain bike tire installed. Talk about making your job easier. In addition, specially sized bosses serve as adaptors so the stand can be used with wheels using thru-axle hubs with removable axles. FEATURESRelated Articles: TS-2EXT. 3 Instructions Manufacturer's Part # # TS-2EXT. 3 | Park Tool | Ts-2Ext. 3 Upright Extensions Ts-2Ext. 3