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    Brake Pad & Rotor Specs

    2021 Ram 2500 — Brake Pad & Rotor Specs

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    Quick reference

    SpecMeasurement/Part Number
    Front pad PN (OEM)68487212AA
    Front pad PN (Akebono)ACT1980
    Front pad PN (BoschQuietCast)BC1980
    Front pad PN (Wagner OEX)OEX1980
    Front pad PN (Power Stop Z23 Evolution)Z23-1980
    Rear pad PN (OEM)68487216AA
    Rear pad PN (Akebono)ACT1989
    Rear pad PN (BoschQuietCast)BC1989
    Rear pad PN (Wagner OEX)OEX1989
    Rear pad PN (Power Stop Z23 Evolution)Z23-1989
    Front rotor diameter14.17 inches (360 mm)
    Front rotor new thickness1.54 inches (39.0 mm)
    Front rotor minimum thickness1.44 inches (36.5 mm)
    Rear rotor diameter14.17 inches (360 mm)
    Rear rotor new thickness1.34 inches (34.0 mm)
    Rear rotor minimum thickness1.25 inches (31.75 mm)
    Caliper piston count (front)2-piston
    Caliper piston count (rear)1-piston
    Front caliper bracket torque140 ft-lbs (190 Nm)
    Rear caliper bracket torque140 ft-lbs (190 Nm)
    Front caliper slide-pin torque26 ft-lbs (35 Nm)
    Rear caliper slide-pin torque26 ft-lbs (35 Nm)
    Brake fluid specDOT 3 or DOT 4

    How to choose pads

    Choosing the right brake pads for your 2021 Ram 2500 depends on your driving habits and intended use. Here's a breakdown of common types:

    • Ceramic Pads: These are popular for their quiet operation, low dust, and long lifespan. They offer consistent performance under various temperatures and are a great choice for everyday driving and towing light to moderate loads. Ceramic pads are generally the most expensive option.

    • Semi-Metallic Pads: Often chosen for their excellent stopping power and heat dissipation, semi-metallic pads are a solid all-around choice. They tend to be more affordable than ceramic pads but can generate more dust and sometimes produce more noise. If you frequently tow heavy loads or drive in mountainous terrain, semi-metallic pads are a good option.

    • Heavy-Duty (HD) Pads: Designed for extreme conditions, heavy-duty pads offer superior heat resistance and stopping power, making them ideal for constant heavy towing, commercial use, or off-road applications. They will typically be noisier and produce more dust than other options, and their increased friction can lead to more rotor wear.

    For a 2021 Ram 2500, a truck often used for towing and hauling, considering semi-metallic or heavy-duty options is wise, especially if you regularly push your truck's capabilities. However, for general use and lighter towing, high-quality ceramic pads provide a comfortable and clean braking experience.

    Typical service life

    The service life of brake components on your 2021 Ram 2500 can vary significantly based on driving style, load, and terrain. On average, you can expect:

    • Front Brake Pads: 30,000 to 70,000 miles. Front brakes do the majority of the stopping work, so they wear faster.
    • Rear Brake Pads: 40,000 to 90,000 miles. Rear brakes wear slower but are still crucial for stability and overall stopping power.
    • Rotors: Rotors often last through two sets of brake pads, but this is highly dependent on how aggressively the vehicle is driven and if the rotors are machined during pad replacement. Generally, 60,000 to 120,000 miles.

    Regular inspections (every 10,000-15,000 miles or with every oil change) are key to catching wear early and preventing more costly repairs. A "pad-slap" (pads only) interval is typically not recommended without at least inspecting the rotors for wear and runout. If the rotors are healthy and within specification, a pad-only replacement might be feasible for one service interval. However, for a heavy-duty truck like the Ram 2500, replacing or machining rotors with every pad change is often a wise investment for optimal braking performance and longevity.

    Common brake issues for this generation

    While the 2021 Ram 2500 is a robust truck, certain brake-related issues can arise, especially given its weight and potential for heavy loads:

    • Premature Wear: Owners who frequently tow heavy trailers or drive aggressively may experience accelerated wear on pads and rotors, particularly the front brakes. This is often an unavoidable consequence of heavy-duty use.
    • Brake pulsation/vibration: This is almost always due to warped rotors, often caused by excessive heat from heavy braking, improper lug nut torque (which can stress the rotors unevenly), or aggressive driving habits.
    • Caliper Issues: Like any vehicle, calipers can seize or develop leaks over time, though this is less common on newer vehicles. Rust and corrosion can contribute to sticky calipers, especially in regions with harsh winters.
    • ABS/Traction Control Lights: While not a "brake issue" in the traditional sense, problems with wheel speed sensors or the ABS module can illuminate these warning lights and impact braking performance. Always have these diagnosed by a professional.

    Brake job cost estimate

    The cost of a brake job for your 2021 Ram 2500 can vary widely based on your location, the shop you choose, and the quality of parts. Here

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    More specs for the 2021 Ram 2500

    Oil Capacity & Filter

    Capacity, weight, filter PN, drain plug torque, change interval.

    Fluid Type Specs

    Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.

    Coolant Capacity & Type

    Total system capacity, OEM coolant spec, flush interval, bleed tips.

    Transmission Fluid & Service

    Trans model, fluid spec, capacity, filter PN, service interval.

    Torque Specifications

    Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.

    Tire Size & Pressure

    OEM size, cold psi, bolt pattern, wheel size, TPMS.

    Battery Size & Group

    Group size, CCA, AGM/flooded, dimensions, reset note.

    A/C Refrigerant & Oil

    R-134a or R-1234yf, charge oz, PAG oil spec.

    Bulb Sizes (Headlight, Tail, Fog)

    Headlight, fog, tail, turn, reverse, interior.

    Factory Maintenance Schedule

    Service intervals by mileage, severe-duty notes, known issues.

    Towing Capacity & Payload

    Max tow, payload, GVWR/GCWR, hitch class by trim.

    Fuse Box Diagram & Amperage

    Fuse box locations, layout, amps, and what each fuse controls.

    Serpentine Belt Routing & Length

    Belt routing, length, rib count, OEM + aftermarket PNs.

    Wheel Alignment Specifications

    Camber, caster, toe ranges (front & rear), adjustability notes.

    Paint Color Codes

    All factory colors with paint codes, sticker location, touch-up tips.

    Wiper Blade Sizes

    Driver/passenger/rear blade size, attachment, OEM + cross-refs.

    Spark Plug Type & Gap

    Plug PN, gap, torque, interval by engine.

    Transmission & Axle Gear Ratios

    Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.

    Key Fob Programming

    DIY programming steps, FCC ID, fob PN, battery, transponder.

    Same spec — other model years

    Maintenance & repair guides

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