Park Tool FR-5.2

The Gold Standard for Drivetrain Maintenance.

The Park Tool FR-5.2 is a professional-grade, heat-treated alloy steel tool featuring a 12-spline pattern. While it is primarily known for handling Shimano, Sram (including 1x), SunRace, and Chris King cassette lockrings, its versatility extends to many disc brake lockrings as well. The 5.2 version features a thin-wall construction, allowing it to fit into tight spaces without removing the hub's axle cones or locknuts.

Why the FR-5.2 is a Toolbox Essential:

• Universal 12-Spline Fit: Engineered to fit the most common cassette lockring standard used by Shimano, Sram, and many others.

• Disc Brake Compatibility: Fits the 12-internal-spline lockrings found on Shimano Centerlock disc brake systems, making it a dual-purpose tool for your drivetrain and braking system.

• Thin-Wall Design: The specialized profile allows for engagement without the need to disassemble your hub's axle components, saving you time and frustration during a swap.

• Heat-Treated Alloy Steel: Built to withstand the high torque required to break loose frozen lockrings, ensuring the splines won't strip or deform over years of heavy use.

• Hex-Base Versatility: The base of the tool is shaped to fit a 1" (25.4mm) socket or adjustable wrench, and it is also compatible with the Park Tool FRW-1 Freewheel Remover Handle for professional-level leverage.

• Pass-Through Centre: Features a large 12mm center hole to clear most quick-release axles and skewer nuts during use.

Technical Specifications:

• Material: Heat-treated Industrial Alloy Steel

• Spline Count: 12-Spline (approx. 23.4mm diameter)

• Base Size: 25.4mm Hex

• Compatibility: Shimano, Sram, SunRace, Chris King, and Centerlock disc lockrings.

The Alegro Perspective: In our service centre, we use the FR-5.2 more than almost any other tool. It is the "hammer" of the bicycle world. Simple, indestructible, and it works every single time. If you plan on changing your own tires, deep-cleaning your cassette, or upgrading your wheels, this tool is your first step. It pays for itself the very first time you avoid a trip to the shop for a simple cassette swap.

Precision Engagement. Industrial Strength. Master your Drivetrain with Park Tool.