Performance Machine Caliper 125x2 - Polished - 0052-2100-P

The Performance Machine Caliper 125x2 – Polished (0052-2100-P) is a premium 2-piston billet aluminum brake caliper designed for custom motorcycle applications, particularly those running springer front ends. Built by one of the most respected names in aftermarket motorcycle braking, this polished caliper combines show-quality aesthetics with performance-engineered stopping power — making it a go-to choice for custom builders and chopper enthusiasts who refuse to compromise on either looks or function.

Key Features & Benefits

• CNC Machined Billet Aluminum Construction: Each caliper is machined from billet aluminum specifically to eliminate flex under braking loads, giving you a firm, consistent lever feel and confident stopping power on your custom build.
• 2-Piston Dual-Action Design: The twin-piston configuration delivers balanced clamping force across the rotor, improving brake modulation and overall stopping performance compared to single-piston sliding caliper designs.
• Polished Finish: The mirror-like polished finish is purpose-made for custom and show bikes where visual presentation matters as much as performance. It complements chrome, polished aluminum, and other show-quality components seamlessly.
• Universal Left or Right Side Mount: Designed with a universal fitment approach, this caliper works for both left-side and right-side rotor/disc configurations, giving custom builders flexibility when laying out their front-end setup.
• Compatible with 11.5" Rotor Diameter: The 125x2 designation corresponds to compatibility with an 11.5-inch brake disc, a popular size for custom and chopper builds using springer-style front ends.
• Brake Dyno Tested: Performance Machine subjects every caliper to rigorous testing on their in-house brake dyno, verifying real-world braking performance before the product reaches your hands.
• Designed for Springer Front Ends: Purpose-built to work great with most springer front end assemblies — a critical detail for custom chopper and bobber builders who need hardware that's engineered for the application, not just adapted to it.

Specifications

• Part Number: 0052-2100-P
• SKU: PFM0052-2100-P
• Brand: Performance Machine
• Piston Configuration: 2-piston dual-action
• Compatible Disc/Rotor Size: 11.5 inch
• Axle Compatibility: 3/4 inch axle
• Material: CNC machined billet aluminum
• Finish: Polished
• Mount Orientation: Universal — left or right side mount

Fitment

This caliper is designed for custom motorcycle applications — it is not a direct bolt-on replacement for a specific year/make/model. It is engineered to work with most springer front ends on custom bikes, choppers, and bobbers. Fitment is compatible with a 3/4-inch axle and an 11.5-inch brake disc. Because it supports both left-side and right-side disc mounting orientations, builders have wide flexibility in how they configure their front brake setup.

If your build uses a different axle diameter or disc size, Performance Machine does offer other bracket and caliper configurations — be sure to verify your rotor diameter and axle size before ordering. Mounting brackets are available separately. If you have any questions about fitment for your specific build, ThreePiece.us is happy to help before you order.

Why Buy from ThreePiece.us

At ThreePiece.us, we specialize in custom motorcycle parts and understand that fitment questions on custom builds aren't always straightforward. Our team is here to help you confirm compatibility before you purchase. Every order ships free — no minimums, no surprises. We also offer financing through Affirm, so you can get your build moving today and pay over time. Shop with confidence knowing you're getting expert support from people who know custom motorcycles.

Frequently Asked Questions

Is this caliper a direct bolt-on for a Harley-Davidson?

No — the Performance Machine 0052-2100-P is designed for custom applications, specifically those using springer front ends. It is not a direct OEM-replacement caliper for a specific year or model. You'll need to verify that your axle is 3/4-inch diameter and that you're running an 11.5-inch brake disc for proper compatibility. Mounting brackets are sold separately.

Does this caliper come with a mounting bracket?

Based on available product information, this listing (0052-2100-P) is for the caliper only. Performance Machine does offer mounting brackets separately. If you need a complete caliper-and-bracket kit for a springer application, PM offers bundled kits as well — reach out to ThreePiece.us and we can help point you to the right combination for your build.

What disc/rotor size does the 125x2 caliper fit?

The Performance Machine Caliper 125x2 in polished finish is compatible with an 11.5-inch brake disc and a 3/4-inch axle. Make sure your rotor size matches before purchasing.

Is financing available for this purchase?

Yes — ThreePiece.us offers financing through Affirm, allowing you to split the cost of your order into manageable payments. All orders also include free shipping, with no minimum purchase required.