Product Description
The L55850-C / FRC11171N is a heavy-duty hydraulic disc brake caliper designed for medium-duty commercial trucks, buses, and related chassis equipped with Bosch-style 73 mm pin-slide brake systems.
This caliper features two 73 mm phenolic pistons and a floating pin-slide design that provides even clamping pressure across the brake pads. It is commonly associated with casting number 4153222 and uses a 7/16-24 hydraulic connection and bleeder.
The 55850-style caliper has been used on a wide range of Ford, Freightliner, International/Navistar, Kenworth, Peterbilt, Sterling, and Thomas Built Bus configurations. Depending on the vehicle and axle setup, it may be used on the left or right side and on front or rear axle positions.
Part Number: L55850-C
Cross Reference: FRC11171N
Product Type: Hydraulic Disc Brake Caliper
Caliper Type: Floating / Pin Slide
Piston Configuration: Twin Piston
Piston Diameter: 73 mm / 2.874 in.
Piston Material: Phenolic
Casting Number: 4153222
Hydraulic / Bleeder Thread: 7/16-24
Common Brake Pad: D786-style
Position: Left or Right; Front or Rear depending on vehicle configuration
Common Cross References: 55850, L55850, FRC11171N, FRC11171, R55850, 4153222, 2501838C91, 2059254C91, 2611391C91, E14688010, E11756, S10131
Always verify the original caliper number, casting number, piston diameter, mounting dimensions, hydraulic connection, and vehicle brake configuration before ordering.
