Grease serves different purposes depending on where you're applying it, and Park Tool's HPG-1 targets the high-load, high-speed applications where standard grease breaks down. Headset bearings, hub bearings, bottom brackets, and pedal spindles all benefit from a grease that maintains its structure under pressure while reducing friction at the contact surfaces.

The HPG-1 uses a synthetic base with a lithium complex thickener, which gives it better shear stability than conventional greases. That matters in rotating assemblies where the grease gets worked constantly—hub bearings spinning at high RPM or bottom bracket bearings under pedaling loads. The formulation resists water washout, so it stays in place during wet rides rather than emulsifying and draining out of your bearings.

Park Tool rates the operating range from -20°F to 300°F, which covers everything from winter fat bike rides to the heat buildup in heavily loaded bearings during long summer climbs. The grease maintains consistent viscosity across that range instead of thinning out when hot or stiffening when cold.... Read More