4515 / 4709 / 4711 American Brake Shoes

4515, 4709, and 4711 are the industry-standard FMSI (Friction Materials Standards Institute) part numbers for American heavy-duty truck and trailer brake shoes. While they all share the exact same foundation size, their hardware configurations differ.

Specification & Comparison

All three models feature a standard size of 16.5" x 7" (Diameter x Width) and are rated for 23,000 lbs (23K) axles.

Part Number	Brake System Style	Key Features & Design
4515 (4515Q)	Meritor Q	Features a quick-change web design. The anchor pin end is open, allowing for fast shoe replacement without fully removing the pins.
4709 (4709E)	Eaton Extended	Designed specifically for Eaton-style foundation brakes. It uses distinct heavy-duty anchor pins and roller pockets unique to Eaton axles.
4711 (4711Q)	Meritor Q-Plus	The upgraded version of the 4515. It uses an optimized web geometry to accommodate thicker premium linings for a longer service life.

Key Application Notes

• No Direct Interchange: Even though they use the same 16.5" x 7" brake drum, you cannot interchange these shoes due to the different web designs, anchor pin slots, and roller positioning.
• Hardware Kits: You must pair each shoe with its specific camshaft/hardware kit. For example, a 4515Q uses a KIT 8000 style hardware package, whereas the 4709E requires an Eaton-specific spring and roller setup.

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