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Product Detail
xFinish the Job: Rear Big Brakes for Toyota Tundra
This Vehicle-Specific Rear Big Brake Kit is built as the rear counterpart to a front BBK on Toyota Tundra XK50/XK70 trucks, restoring proper brake bias and stability when you’re towing or hauling real weight.
Front-only upgrades can make the truck pitch forward and feel edgy under hard stops with a trailer, tools, or a loaded bed. This 4-piston forged caliper and 365 mm high-carbon rotor system is tuned to complement a front big brake kit on Tundra, adding rear thermal capacity and helping the truck stay level and controlled when you’re coming down a long grade with a load behind you.
Technical Specifications & Kit Options for Toyota Tundra
These specs show how the rear system is matched to the Tundra’s size, towing use, and front BBK options. The piston area is set to bring the rear axle back into the mix under heavy braking, while the oversized rotor increases heat capacity for repeated stops with a camper, boat, or car trailer in tow.
| Caliper Engineering | |
|---|---|
| Series | Vehicle-Specific Series |
| Application | Toyota Tundra (XK50/XK70) |
| Mounting Position | Rear Axle |
| Piston Count | 4-Piston, Staggered |
| Piston Type | 2-Piece Vented with Dust Boots |
| Piston Diameter | 30 mm / 34 mm (1.18 in / 1.34 in) |
| Total Piston Area | 32.28 cm² (5.00 in²) |
| Construction | 2-Piece Forged Aluminum Alloy |
| Net Weight | 3.20 kg (7.05 lbs) (Single Caliper, No Pads) |
| Finish | High-Temperature Gloss Coating |
| Min. Wheel Size | 17" Recommended |
| Rotor Specification | |
| Material | High-Carbon Steel |
| Dimensions | ⌀365 mm (14.37 in) × 28 mm (1.10 in) thick |
| Construction | 1-Piece Vented |
| Surface Patterns | Curved Slotted |
| Brake Pad Compound | |
| Compound Model | M-01 Street Performance |
| Operating Temp | Up to 600°C (1112°F) |
| Friction Coefficient | 0.38 μ |
| Supporting Hardware (Vehicle-Specific) | |
| Brake Hoses | 3-Layer Stainless Steel Braided (PTFE Core, SUS304 Braid, PVC Sheath), Toyota Tundra-specific lengths and fittings |
Will It Fit? Your 3-Step Check
1. Wheel Diameter
Confirm you are running 17" or larger wheels.
2. Spoke Clearance
Measure from the rotor mounting face to the back of the wheel spokes. You need at least 100 mm (3.94 in) of clearance.
3. Vehicle Model
Please use the vehicle filter or contact us with your Tundra’s year, cab, and drivetrain to confirm.
Want a printable fitment template? Contact us with your vehicle's year, make, and model, and we'll email you a 1:1 wheel-clearance template.
Frequently Asked Questions
Do I really need rear big brakes on my Tundra?
If you’re towing or hauling and already running a front BBK, yes. Front-only upgrades can overload the front axle, increase nosedive, and make the rear of the truck feel loose when you brake hard with a trailer or full bed. This rear kit is sized to bring the rear brakes back into balance so the truck stays flatter, more stable, and easier to control.
Is this kit a direct bolt-on?
Yes. For the Tundra XK50/XK70 models listed in the application, the calipers, rotors, and hoses are designed to mount to factory points. Installation is similar to a standard rear brake job with caliper and rotor replacement—no cutting or permanent modification required.
How does this help with towing or work use?
When you’re pulling a camper, boat, or equipment trailer and running near the truck’s rated capacity, the rear brakes carry more load than most people realize. This kit adds rear clamping power and thermal capacity to work with your front BBK, helping you maintain a solid, repeatable pedal on long downhill grades and in stop-and-go traffic.
What's in the box? Is this a complete kit?
Yes, this is a complete, vehicle-specific rear big brake kit for the Toyota Tundra. Each kit includes:
- 2x 4-Piston Forged Calipers
- 2x 1-Piece 365 mm High-Carbon Steel Rotors
- 1x Set of M-01 Street Performance Brake Pads
- 2x Stainless Steel Braided Brake Hoses (Tundra-specific)
See This Kit In Action
See how other Tundra owners build a full front-and-rear brake package for towing, work, and weekend trips. Real trucks, real results.
View Customer BuildsCare Guide
xHeads Up! What to Know Before You Install
You’re here because you’re passionate about your ride, and so are we. We want your TTSPORT brake upgrade to be a total win. Here’s some straight talk to make sure everything goes smoothly, from fitment to bedding in.
Our Return Policy
Look, we know you get it. Your brake kit is custom-made for your specific car. That means once it's built, it's yours. We can only accept returns if there’s a genuine quality defect from our side.
Sometimes, aftermarket wheels can be tricky. Depending on the design, you might need spacers for clearance. We’ll do our best to help you figure it out, but issues related to wheel spacers don't qualify for a return.
1. Let's Nail the Fitment
To get this right the first time, we need your help. Before you order, please give us the following info:
- Your vehicle's Make, Model, Year, and VIN.
- Your wheel size and specs.
We’ll likely ask you to confirm some measurements and send a few photos of your wheels. Please double-check everything you send us. TTSPORT isn't responsible for fitment issues if the specs you provided were off.
We check every single part before it leaves our shop. When your kit arrives, give it a good look-over. If you spot any potential quality issues, let us know within 24 hours.
2. The Fun Part: Bedding In Your New Brakes
This is key to awesome performance. Don't skip it.
- Find a safe, open road. Bring your car up to 40 mph (approx. 65 km/h) and apply firm, steady pressure to slow down to 10 mph (approx. 15 km/h). Don't come to a complete stop. Do this 10 times to get the pads and rotors acquainted.
- For the next 300-600 miles (approx. 500-1,000 km), take it easy. No crazy hard stops. This cures the pads and rotors and ensures a long, happy life.
- You'll notice our high-carbon steel rotors have a colored, grooved surface. This isn't just for looks—it helps speed up the bedding-in process and fights off corrosion.
3. Our Promise: The TTSPORT Warranty
We build our kits to last, and we stand by our work. Here’s the breakdown:
- Calipers: Covered for 1 year against manufacturing defects. We also offer lifetime maintenance (you just pay for parts).
- Rotors & Hoses: Covered for 90 days against manufacturing defects. These are wear items, but you can expect them to last 25,000-35,000 miles (approx. 40,000-60,000 km) depending on your driving style.
- Brake Pads: Covered for 90 days against manufacturing defects. Typically good for 15,000-25,000 miles (approx. 25,000-40,000 km).
- Custom Hats/Brackets: We guarantee they'll fit perfectly out of the box. Once they're installed, they're not covered under warranty.
4. Pro Tips for Long-Lasting Performance
- After a session of hard driving, let your brakes cool down naturally. Don't spray them with cold water—that's a fast way to warp rotors.
- Brakes feel different in the rain. Give yourself some extra stopping distance.
- If you hear or feel anything weird—grinding, shaking, etc.—talk to your installer right away.
Recommended Service Intervals:
- Rotors: Replace them when wear exceeds 3 mm (approx. 0.12 inches).
- Front Pads: Plan on swapping them every 20,000 miles (approx. 32,000 km) or so.
- Rear Pads: Usually last longer, around 35,000 miles (approx. 56,000 km).
- Brake Fluid: Flush and replace every 25,000 miles (approx. 40,000 km) or every 2 years, whichever comes first.
- Choosing a selection results in a full page refresh.