Park Tool

GPS-1 Five-Piece Bottom Bracket Tool Guide Pin Set

Park Tool GPS-1 Five-Piece Bottom Bracket Tool Guide Pin Set improves stability and alignment during bottom bracket removal and installation by centering compatible Park Tool BBT-series tools on the spindle or hub interface. With five pin sizes covering common thru-axle hub and bottom bracket spindle standards, the GPS-1 helps mechanics apply torque more squarely—reducing the chance of the service tool walking or misaligning under load during removal or installation.

• Alignment-focused guide pins - Helps keep compatible bottom bracket tools centered for cleaner engagement during high-torque service
• Five common standards covered - Includes five different pin sizes to match a range of modern thru-axle hub and BB spindle interfaces in one set
• Extra-long 61mm usable length - Reaches deep enough to stabilize the tool and support consistent alignment
• 5mm hex fitting - Installs and removes with a standard 5mm hex key for straightforward setup
• Threaded compatibility - Threads into any of thirteen Park Tool bottom bracket tools that feature integrated guide-pin threads
• Accessory set (tools sold separately) - Designed to pair with compatible Park Tool BBT-series tools; bottom bracket tools are not included