Controlled grease placement matters more than most people think. Squeeze a tube freehand and you get grease on your gloves, on the workstand, on the frame — everywhere except the bearing race you were aiming for. Park Tool's GG-1 Grease Gun converts any standard grease tube into a single-handed precision applicator, putting a fine line of grease exactly where you direct it: headset cups, hub bearings, bottom bracket threads, pedal spindles.

The GG-1 works two ways. You can screw the pump head directly onto any Park Tool grease tube — PPL-1, HPG-1, or ASC-1 anti-seize — using the internal receiving threads, which turns the tube itself into the grease reservoir. Alternatively, the included canister lets you load grease from any brand and use the gun as a self-contained unit. Either way, the spring-loaded trigger feeds grease through a small-diameter tip opening that keeps output precise and mess-free. One hand runs the trigger while the other holds the component in position.

One important compatibility note: Park Tool specifies that the GG-1 should not be used with SAC-2 assembly compound or other friction-paste products. Those compounds contain grit particles that can damage the plunger seal and clog the fine tip opening. Stick to grease and anti-seize only.... Read More