The Park Tool TS-25 Repair Stand-Mounted Wheel Truing Stand is a handy accessory for making quick truing adjustments in situations where bringing a full-sized truing stand is not practical or possible. The PRS-25 installs easily onto the top tube and upright of select Park Tool portable repair stands and can be used while a bike is installed in the repair stand. Securely holds any quick release or solid axle wheel and adjusts for any wheel diameter and rim width.Fits the following Park Tool repair stands directly: PCS-1 (post-01/2004) PCS-4 (post-01/2003) PCS-4-1 PCS-4-2 PCS-10 PRS-25Fits the following Park Tool repair stands with PCS-EXT Repair Stand Extension for PCS-1 and PCS-4: PCS-1 (06/1996 to 01/2004) PCS-4 (pre-01/2003)NOTE: For thru axle hubs it is necessary to also use the TS-TA Thru Axle Adaptor to take the place of the quick release skewer