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If you drive a Ram 2500, rear brake calipers are a safety-critical component that directly affect stopping power, pedal feel, and brake balance under load. Worn, leaking, or corroded rear calipers can cause uneven pad wear, reduced braking performance, and increased towing strain. Replacing the calipers before they fail helps maintain reliable braking when carrying heavy payloads or towing.This guide covers our shortlist of the top rear brake calipers suited to the Ram 2500. We evaluated each option for fitment accuracy, corrosion resistance, sealing quality, and long-term serviceability so you can pick a caliper that matches how you use the truck. Read on for practical buying factors and answers to common owner questions.
Looking for other parts? See all Ram 2500 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | PHILTOP Rear Brake Caliper for Ram 2500/3500 (Rear) |  |
| Best Quality Built to a higher standard if you want something more solid | PowerStop Rear Powder Coated Brake Caliper Pair (S5174) |  |
| Best Value The sweet spot between price and what you get | SCITOO Rear Left Brake Caliper 18B5175 (1PC) |  |
| Best Budget The cheapest option that still gets the job done reliably | cciyu Rear Left & Right Disc Brake Calipers with Bracket (Pair) |  |
| Highest Rated A top-rated pick with lots of positive feedback | KAX Rear Brake Caliper (Pair) for Ram 2500 / Ram 3500, Rear Position |  |
1. PHILTOP Rear Brake Caliper for Ram 2500/3500 (Rear)
| Position | Rear |
|---|---|
| Manufacturer | PHILTOP |
| OEM Part Number | 18B5175, 18B5174, 68049176AB, 68049177AB |
| Material | Ductile iron |
This PHILTOP rear brake caliper is a direct-fit replacement for specified Ram 2500 and 3500 model years and arrives as a complete assembly with bracket, phenolic piston, and mounting hardware. It is intended for routine brake system repairs when a worn or leaking rear caliper needs replacement; professional installation and brake bleeding are recommended. The ductile iron casting and refined galvanizing give the caliper strong heat resistance and improved corrosion protection for long-term service on a heavy-duty truck. Each unit is pressure-tested and produced under IATF16949 processes, which helps ensure consistent sealing and fitment. The caliper ships without pads so you can reuse existing pads or fit new ones to match your rotor condition. The main compromises are that installation requires mechanical skill and bleeding the system, and it does not include brake pads or hoses, so plan to purchase those separately when doing a full rear brake job.
Best for: Owners wanting a reliable, factory-style replacement caliper for rear brake repairs on the listed Ram 2500/3500 model years who prioritize durability and correct fitment.
Less Ideal for: Buyers seeking a performance upgrade, a plug-and-play kit with pads and hoses included, or a do-it-yourselfer without brake-bleeding experience.
- Direct-fit assembly with bracket, phenolic piston, and mounting hardware for the specified Ram models
- Ductile iron construction provides strong heat resistance and durability under heavy-duty use
- Galvanized surface treatment improves rust resistance for longer service life
- Manufactured under IATF16949 and pressure-tested for sealing, supporting consistent quality
- Does not include brake pads or hoses, so additional parts may be required for a complete repair
- Requires professional installation and brake bleeding for correct operation
Verdict: A durable, factory-spec rear caliper replacement built for long-term service on the specified Ram 2500 and 3500 models.
2. PowerStop Rear Powder Coated Brake Caliper Pair (S5174)
| Auto Part Position | Rear |
|---|---|
| Automotive Fit Type | Vehicle Specific Fit |
| Material Type | Powder Coated |
| Included Components | Set of Calipers, Hardware |
These PowerStop rear calipers replace the factory rear calipers on specified Ram and Dodge heavy-duty trucks and arrive as a ready-to-install pair with hardware. They are powder coated in red to resist corrosion and simplify cleanup while offering a more finished look than bare cast units. The set includes seals, guide pins, dust boots, bleeder screws, pad attachment hardware, and mounting brackets so installation is a direct bolt-on for the listed years and wheel configurations. PowerStop pressure tests and inspects each caliper, and the package is aimed at owners who want a durable, visually upgraded rear braking assembly without modifying other components. Expect factory-style operation and compatibility with the truck's existing brake pads and hoses, but note the product carries a short 90-day/3,000-mile warranty and is a direct replacement rather than a high-performance caliper for sustained track use. Good maintenance and proper bedding-in of pads remain important to get the best brake feel and longevity.
Best for: Buyers who want a straightforward rear caliper replacement that improves corrosion resistance and appearance while maintaining factory braking characteristics on the specified Ram 2500/3500 and related models.
Less Ideal for: Drivers seeking a high-end performance caliper package for heavy repeated towing, track work, or race use should look for purpose-built performance conversions instead.
- Vehicle-specific fitment for listed Ram and Dodge models simplifies replacement
- Comes with necessary hardware for bolt-on installation
- Durable powder-coated finish resists rust and is easy to clean
- Both left and right calipers are pressure tested and inspected before shipping
- Warranty period is limited to 90 days or 3,000 miles
Verdict: A convenient, vehicle-specific rear caliper pair that upgrades corrosion resistance and looks while delivering factory-style replacement performance for the listed Ram/Dodge heavy-duty trucks.
3. SCITOO Rear Left Brake Caliper 18B5175 (1PC)
| Position | Rear Driver Side |
|---|---|
| OE Number | 18B5175 |
| Brake Piston Count | 2 Pistons |
| Piston Material | Phenolic |
| Bleeder Port Size | M10 x 1.0 |
This SCITOO rear left brake caliper replaces the factory unit on compatible Ram 2500/3500 trucks and is built for direct bolt-on installation. It comes with the mounting bracket, copper washers and bracket bolts so you can complete a like-for-like swap without needing additional hardware. The caliper uses two phenolic pistons and a thick high-temperature zinc coating to resist corrosion and reduce piston sticking over time. A polished slide pin and dual-layer seals are intended to lower squeal and keep contaminants out, which helps maintain smooth braking and even pad wear. Expect this part to be used during routine caliper replacement or when a leaking, seized, or damaged rear caliper needs a straightforward repair. Installation can be handled by a competent DIYer with the right tools, but professional installation is recommended for brake safety. The caliper targets practical fleet or owner-operators who want a complete, hardware-included replacement; it is not a performance upgrade and will match factory braking characteristics rather than improve stopping power or cooling.
Best for: Buyers who prioritize a practical, ready-to-install replacement that restores factory braking function with minimal fuss and supported hardware.
Less Ideal for: Drivers seeking performance upgrades, heavy towing-oriented brake enhancements, or race-track oriented caliper improvements should consider performance-specific options instead.
- Direct-fit design with included bracket and mounting hardware for straightforward replacement
- High-temperature zinc coating and dual-layer seals for corrosion resistance and longer service life
- Phenolic pistons and polished slide pin aimed at smoother operation and reduced pad wear
- Designed as a factory-style replacement so it does not offer upgraded performance or enhanced cooling capabilities
Verdict: If you need a no-nonsense, hardware-inclusive rear left caliper that bolts onto Ram 2500/3500 trucks and restores factory braking reliability, this is a practical choice.
4. cciyu Rear Left & Right Disc Brake Calipers with Bracket (Pair)
| Position | Rear |
|---|---|
| Piston Diameter | 45 mm (1.77") |
| Piston Count | 2 Pistons |
| Bracket Included | Yes |
These cciyu rear calipers are a direct-replacement pair built for Ram 2500 and 3500 rear single-wheel setups across the listed model years. They arrive as a two-piece set with mounting brackets and installation hardware included so you can swap them in without hunting for extra parts. Cast-iron housings, sealed phenolic pistons and thicker sealing rings are intended to resist fluid leaks and deliver steady braking force while reducing noise. The calipers meet or exceed factory specifications and the coated painted finish helps corrosion resistance. For a budget-focused repair, this kit covers both left and right sides and saves time by including brackets. Limitations to consider are that pads and rotors are not included so a full brake service requires additional purchases, and fitment must be confirmed against your vehicle's heavy-duty/axle configuration before ordering. Installation will be straightforward for anyone with basic mechanical skills or a shop doing a routine rear caliper replacement.
Best for: Buyers who need an affordable, complete rear-caliper swap that minimizes parts hunting and prefer a direct-fit replacement to restore braking on specified Ram 2500/3500 rear single-wheel trucks.
Less Ideal for: Drivers planning a full rotor-and-pad overhaul who want an all-in-one kit or owners unsure of their axle/drive configuration without checking detailed fitment information.
- Sold as a complete left-and-right pair with brackets and installation hardware included
- Cast iron construction with sealed phenolic pistons aimed at long-term durability
- Coated/painted finish for added corrosion resistance
- Designed to meet or exceed factory specifications for a direct fit on the specified Ram rear application
- Does not include brake pads or rotors so additional parts are needed for a full brake job
- Fitment varies by axle and heavy-duty configuration so careful verification is required before purchase
Verdict: If you want a budget-friendly, ready-to-install pair of rear calipers that restore factory-quality braking on the specified Ram rear single-wheel models, this kit is a practical choice.
5. KAX Rear Brake Caliper (Pair) for Ram 2500 / Ram 3500, Rear Position
| Position | Rear |
|---|---|
| Brake piston count | 2 phenolic pistons |
| Bleeder port size | M10x1.0 |
| Brake inlet port size | M10x1.0 |
| OEM part numbers | 18B5175, 18B5174, 68049176AB, 68049177AB |
These KAX rear calipers are a direct replacement option for Ram 2500 and Ram 3500 rear brakes and come as left and right units. They are machined assemblies built around twin phenolic pistons per caliper with M10x1.0 bleeder and inlet ports, so they hook into the stock brake lines and bleed normally. KAX highlights CNC machining and high-strength mounting bolts intended to keep the piston movement smooth and the caliper secure under heavy braking, which helps maintain consistent pedal feel and stopping performance on a heavy truck. Typical use is straightforward: swap the worn factory rear calipers for these, reuse or replace pads and hardware as needed, then bleed the system. The practical benefits are factory-style fitment for the quoted Ram model years, robust mounting fasteners for durability, and pistons sized to match the original hydraulic characteristics. Limitations are that the calipers are sold without pads and you must confirm heavy-duty, 4WD, or other drivetrain variants before buying to ensure exact fitment for your truck.
Best for: Buyers who prioritize a reliable, factory-style replacement for worn rear calipers on specified Ram 2500/3500 trucks and want units built for heavy-duty braking conditions.
Less Ideal for: If you need a complete rotor-pad-caliper rebuild kit or are replacing front calipers, this part set is not the right purchase; also avoid if your vehicle variant is outside the listed years or configurations.
- Designed to match factory rear caliper fitment for the listed Ram 2500/3500 years
- Machined finish and CNC precision claimed to improve piston sliding and brake response
- High-strength mounting bolts for better durability under heavy braking
- Standard M10x1.0 bleeder and inlet ports for straightforward plumbing and bleeding
- Sold without brake pads so pads and hardware may be required separately
Verdict: A durable, factory-fit machined rear caliper pair aimed at Ram 2500/3500 owners who want a reliable, heavy-duty replacement for worn rear braking components.
Choosing the Right Ram 2500 Rear Brake Calipers: Key Factors to Consider
Fitment and Compatibility
Correct fitment is the most important factor for rear calipers on the Ram 2500. A caliper must match the truck's mounting points, brake line inlet orientation, bleeder screw location, and piston diameter so it seats properly on the rotor and connects to existing lines without modification.
Poor fitment can lead to installation headaches, leaking connections, or altered brake geometry that affects pad life and braking balance. Always verify the caliper's stated compatibility with the Ram 2500 rear assembly and confirm any notes about trim-specific differences. If the vehicle has aftermarket rotors or brake line fittings, account for those when confirming compatibility.
Corrosion Resistance and Coating
Ram 2500 trucks are frequently used in harsher conditions such as salted roads, mud, and heavy highway duty. Calipers with durable coatings or corrosion-resistant materials limit rust on the body and bleeder threads and reduce the likelihood of seized pistons or stuck slide hardware.
A protective finish on the caliper body and stainless or plated hardware extends service life and simplifies future maintenance. If you operate in coastal or winter environments, prioritize calipers with enhanced corrosion protection and consider greases and anti-seize where applicable during installation.
Piston and Seal Design
The piston and seal arrangement determines how well the caliper maintains hydraulic pressure and resists leaks. Robust piston materials and reliable seal designs minimize the chance of brake fluid loss, wandering pistons, or inward leakage that diminishes braking efficiency.
Consider whether the caliper uses single or dual pistons and the piston material. Look for designs with well-documented seal replacement procedures or available seal kits to make future rebuilds practical. A caliper that holds pressure and resists contamination will improve pedal feel and braking consistency under load.
Serviceability and Parts Availability
For a truck like the Ram 2500, ability to service the caliper in the field or during scheduled maintenance is valuable. Check that common wear parts such as seals, slides, guide pins, and mounting hardware are readily available as rebuild kits.
Calipers that allow straightforward disassembly and use standard bleeder screws and hardware reduce shop time and complexity. If you plan to service the brakes yourself, prefer calipers that include clear instructions and replaceable parts rather than fully sealed units that must be discarded.
Mounting Hardware and Installation Requirements
Some calipers include mounting brackets, hardware, or require specific torque sequences to achieve correct alignment. Confirm whether the caliper ships with the necessary bolts, pins, and shims or whether you must reuse existing components from the old caliper.
Installation complexity affects the time and tools required. If the caliper requires rotor resurfacing, new pads, or brake line adapters, factor that into the project scope. For owners who tow or haul heavy loads, ensure mounting hardware is rated for the vehicle's duty cycle.
Brake Balance and Performance Under Load
Rear calipers contribute to overall brake balance, especially on heavy trucks where rear braking reduces front rotor stress during towing. Choose calipers with piston sizes and pad contact profiles that maintain balanced braking and predictable pedal feel when the truck is loaded or towing.
Consider how the caliper design affects pad wear and heat dissipation. Some rear calipers are optimized to minimize dragging while still providing adequate clamping force; this balance matters for fuel economy and rotor life on a working Ram 2500.
Signs You Need New Rear Calipers
Recognizing caliper failure early prevents secondary damage to pads and rotors. Common indicators include persistent brake drag, a soft or sinking brake pedal, uneven pad wear on the rear axle, fluid leaking near the caliper body, or a vehicle that pulls to one side under braking. Corrosion visible on the caliper housing or stuck guide pins can also indicate imminent failure.
- Brake pedal feels spongy or sinks over time
- One rear pad wears much faster than the other
- Visible brake fluid leak at the caliper or bleeder screw
- Dragging wheel or elevated rotor temperature after driving
When To Rebuild Versus Replace
Rebuilding a caliper can be cost-effective when the housing is structurally sound, threads and mounting surfaces are intact, and replacement seal kits are available. Rebuilds are common for vehicles with serviceable caliper designs where piston bores are not excessively corroded.
If the housing is severely corroded, piston bores are scored, or mounting points are compromised, replacement is the safer choice. Consider availability of rebuild kits and the labor involved; for heavy-duty use on a Ram 2500, full replacement may offer longer-term reliability.
- Rebuild if bores are clean and rebuild kits exist
- Replace if housing or piston surfaces are badly pitted or damaged
Brake Bleeding and Bedding After Installation
Any caliper replacement requires thorough bleeding of the brake system to remove air and restore firm pedal feel. Use a pressure or manual bleeding method and follow the recommended sequence for the Ram 2500 rear circuit to ensure even pressure.
After installing new calipers and pads, perform a controlled bedding procedure to mate pads to rotors. Proper bedding improves initial friction characteristics and reduces glazing or uneven wear. Allow a cooling period between aggressive stops to protect the new components.
- Bleed brakes until firm pedal return and no air in the lines
- Perform progressive bedding with repeated moderate stops
Corrosion Prevention Tips for Long Life
Regular inspection and cleaning of the rear calipers extends service life. Remove road grime, salt, and debris and inspect bleeder screws and mounting hardware for corrosion. Use high-temperature brake grease on slide pins and anti-seize on threads where appropriate to discourage seizure.
If you store or operate the truck in winter conditions, consider under-body washes after salt exposure and apply protective coatings to caliper surfaces where feasible. Timely replacement of leaking seals prevents brake fluid contamination and internal corrosion.
- Clean calipers and bleeder screws after salt exposure
- Lubricate slide pins with high-temp grease during service
Compatibility With Brake Line and ABS Components
Ensure the replacement rear caliper works with the existing brake line fittings and the Ram 2500's ABS sensors and wheel-speed circuitry. Some calipers have different inlet positions or require adapters; verify the inlet thread and orientation match your truck's fittings.
ABS modules can be sensitive to air in the lines and to differences in caliper internal volume. Maintain correct bleed procedures and check ABS indicator behavior after installation to confirm proper operation.
- Confirm inlet thread type and orientation before purchase
- Test ABS indicators and perform a road test after bleeding
Still looking for the perfect fit?
Select your Ram 2500 configuration to see the most relevant Brake Calipers recommendations
How We Chose the Best Ram 2500 Rear Brake Calipers
Our selection focused on rear brake calipers that meet the demands Ram 2500 owners commonly face: heavy loads, frequent towing, and exposure to road salt and dirt. We applied a combination of fitment verification, materials and coating assessment, and serviceability checks to narrow the field. Key evaluation criteria included: reliable fitment to Ram 2500 rear hubs and brake lines; corrosion-resistant finishes or housings suitable for long-term exposure; robust piston and seal designs to resist leaks and sticking; ease of installation including standard bleeder and mounting locations; and availability of rebuild or seal kits to support in-service repairs.We excluded calipers with unclear vehicle fitment information, poor sealing designs, or finishes that lack corrosion protection. We also set aside options that require uncommonly modified hardware or adapters for installation. The result is a focused list of dependable rear calipers that balance durability, serviceability, and proper fit for the Ram 2500 application.
Our full evaluation process is outlined in our review methodology.
FAQ
What are common brake caliper symptoms on a Ram 2500?
Common symptoms include a pulling sensation during braking, uneven rear pad wear, visible fluid leakage, a soft brake pedal, or a wheel that runs hotter than the opposite side. These signs often point to piston or seal issues, sticking guide pins, or corroded caliper surfaces.
Can I rebuild a rear caliper on my Ram 2500 myself?
You can rebuild many calipers if you have the correct seal kit, tools, and a clean workspace. Rebuilds are practical when bores and mounting surfaces are in good condition. If you are uncertain about bore damage or corrosion, replacement is safer.
How long does a rear caliper typically last on a heavy-duty truck?
Service life varies widely with use and environment. Under normal highway use, calipers can last many years, but frequent towing, heavy loads, or exposure to road salt will shorten their life. Regular inspection and maintenance extend interval between replacements.
Will replacing rear calipers change my brake bias or pedal feel?
A properly sized and fitted caliper should maintain the intended brake balance and pedal feel. However, switching to a caliper with different piston size or internal volume can alter pedal travel and bias. Always choose calipers specified for the Ram 2500 rear to preserve braking characteristics.
Do I need to replace brake hoses when changing rear calipers?
Not always. Inspect rubber brake hoses for cracks, bulges, or internal deterioration. If hoses are old, brittle, or show signs of contamination, replace them while performing caliper work to ensure reliable hydraulic performance.
Final Verdict
For a Ram 2500, prioritize rear calipers that deliver reliable fitment, strong sealing, and durable corrosion protection. Consider how you use the truck when weighing rebuildable designs against full replacements: frequent towing and harsh-weather use favor corrosion-resistant, serviceable calipers with readily available seal kits.Balance ease of installation and long-term serviceability against initial convenience. Focus on correct fitment, piston and seal quality, and parts availability to maintain braking performance and safety. With those priorities in mind, you can choose a rear caliper that restores stopping power and stands up to the demands of heavy-duty use.
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- Check out all Ram 2500 parts & accessories
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