Monoblock Forged Caliper
One-piece forged aluminum body resists flex under high line pressure, keeping piston alignment honest lap after lap. Caliper weighs 3.19 kg without pads.
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Description
Circuit Racing TR68 Front Wheel 6-Piston Big Brake KitRacing Series Circuit Front Axle 6 Piston TR68 Front 6 Piston Big Brake Kit The TR68 is a front axle, 6 piston monoblock big brake kit built for circuit work repeat lap pace, predictable pedal feel deep into a session, and a service window that holds up to real track abuse. Forged aluminum body, staggered piston bores, and a two piece rotor package sized from 355 to 390 mm give you the thermal headroom and bite balance circuit drivers actually need.
Racing Series · Circuit · Front Axle · 6-Piston
TR68 Front 6-Piston Big Brake Kit
The TR68 is a front-axle, 6-piston monoblock big brake kit built for circuit work — repeat lap pace, predictable pedal feel deep into a session, and a service window that holds up to real track abuse. Forged aluminum body, staggered piston bores, and a two-piece rotor package sized from Ø355 to Ø390 mm give you the thermal headroom and bite balance circuit drivers actually need.
Why Builders Choose the TR68
The TR68 is built for circuit drivers who need thermal repeatability, tunable brake balance, and serviceable hardware across long sessions. A monoblock forged body, staggered 6-piston bore layout, 36 mm-thick two-piece rotors, and PTFE / SUS304 braided lines work together to deliver a firm, linear pedal under sustained load.
Staggered 6-Piston Bore
27 / 32 / 38 mm differential bores load the pad evenly front-to-rear, fighting taper wear and keeping the friction surface flat through long stints. Total piston area: 50.10 cm² per caliper.
Two-Piece Race Rotors
Ø355, 378, or 390 mm × 36 mm two-piece assemblies with directional vanes. Choose curved slot, grain slot, wave slot, or drilled-and-slotted faces.
Pad Window You Can Tune
Standard compound 0–600 °C, μ ~0.38. Optional racing compound 0–750 °C, μ ~0.45 for higher-energy circuits and heavier cars.
Thermal Repeatability
36 mm-thick vented two-piece rotors and a forged caliper shed heat across long sessions without pedal fade.
Serviceable Track Platform
Two-piece rotor design lets you replace friction rings only — hats, bobbins, and hardware stay in service.
Technical Specifications & Kit Options
| Brake Caliper | |||
|---|---|---|---|
| Series | Racing Series — Circuit | ||
| Model / Application | TR68 | ||
| Axle Position | Front | ||
| Piston Count | 6-piston | ||
| Piston Type | Racing pistons without dust boots | ||
| Piston Diameter | 27 mm × 2 / 32 mm × 2 / 38 mm × 2 | ||
| Caliper Dimensions | 299 mm × 191 mm × 79.4 mm | ||
| Total Piston Area | 50.10 cm² per caliper | ||
| Manufacturing Process | Monoblock forged aluminum body | ||
| Net Weight | 3.19 kg per caliper, without pads | ||
| Surface Finish | Nickel-plated | ||
| Recommended Wheel Size | 18 in or larger | ||
| Recommended Rotor Size | Ø355–390 mm × 36 mm | ||
| Brake Rotor Options | |||
| Rotor Option | 355 mm | 378 mm | 390 mm |
| Rotor Material | Heat-treated high-carbon cast iron or Option B racing-grade heat-treated high-carbon cast iron | Heat-treated high-carbon cast iron or Option B racing-grade heat-treated high-carbon cast iron | Heat-treated high-carbon cast iron or Option B racing-grade heat-treated high-carbon cast iron |
| Axle Position | Front | Front | Front |
| Rotor Dimensions | Ø355 mm × 36 mm | Ø378 mm × 36 mm | Ø390 mm × 36 mm |
| Construction | Two-piece rotor assembly | Two-piece rotor assembly | Two-piece rotor assembly |
| Ventilation | Internally vented | Internally vented | Internally vented |
| Rotor Hats | Application-specific alloy rotor hats | Application-specific alloy rotor hats | Application-specific alloy rotor hats |
| Rotor Mounting | Fixed or floating, depending on rotor size and vehicle | Fixed or floating, depending on rotor size and vehicle | Fixed or floating, depending on rotor size and vehicle |
| Directional Design | Yes — left/right specific | Yes — left/right specific | Yes — left/right specific |
| Rotor Face Pattern | Curved slot / Grain slot / Wave slot / Drilled & slotted; Option B: Wave slot | Curved slot / Grain slot / Wave slot / Drilled & slotted; Option B: Wave slot | Curved slot / Grain slot / Wave slot / Drilled & slotted; Option B: Wave slot |
| Recommended Use | Lightest rotor option for tighter circuits, lower-mass cars, or wheel-clearance-limited builds | Balanced choice for most track-day and time-attack builds | Maximum leverage and heat capacity for high-speed circuits, heavier platforms, and endurance use |
| Brake Pad Options | |||
| Pad Option | Standard | Option B Racing | |
| Compatible Rotor Material | Iron / steel rotors only | Iron / steel rotors only | |
| Operating Temperature | 0–600 °C | 0–750 °C | |
| Average Friction Coefficient | μ ~0.38, varies with temperature, pressure, and rotor condition | μ ~0.45, varies with temperature, pressure, and rotor condition | |
| Recommended Use | HPDE and club-level track use | Endurance, heavy cars, and sustained high-energy stops | |
| Lines, Brackets & Service | |||
| Brake Line Construction | Three-layer reinforced | ||
| Brake Line Material | PTFE inner liner / SUS304 stainless-steel braid / PVC protective outer sheath | ||
| Caliper Mounting | Radial mount with vehicle-specific caliper brackets | ||
| Caliper Brackets | Vehicle-specific radial caliper brackets | ||
| Brake Line Fittings | Vehicle-specific; caliper-side and chassis-side fittings vary by application | ||
| Wheel Clearance | 18 in or larger wheel recommended; final clearance depends on wheel design, spoke shape, barrel offset, rotor size, and bracket package | ||
| Rotor Service | Two-piece rotor design allows friction ring replacement while retaining the alloy hat, bobbins, and hardware when serviceable | ||
| Bedding-In Procedure | Required before track use | ||
Track-use product. Racing pistons run without dust boots and racing pads have higher cold-bite thresholds. Bedding-in is required. Confirm wheel clearance, 18 in minimum, and final fitment with TTSPORT before installation.
Package List
Calipers ×2
2 × TR68 front monoblock forged 6-piston calipers with nickel-plated finish.
Brake Pads
Brake pads for both front calipers, selected from Standard 0–600 °C or Option B Racing 0–750 °C package.
Brake Rotors ×2
2 × two-piece internally vented front rotors, selected from Ø355 / 378 / 390 mm × 36 mm, left/right specific.
Caliper Brackets ×2
Vehicle-specific radial-mount caliper brackets for correct front caliper alignment.
Rotor Hats ×2
Application-specific alloy rotor hats matched to front hub geometry and rotor offset.
Brake Hoses ×2
Three-layer stainless-steel braided brake lines with PTFE inner liner, SUS304 braid, and PVC protective outer sheath.
The Bespoke Engineering Process
Every TR68 front circuit racing system is engineered around the vehicle’s front knuckle, hub location, rotor hat offset, wheel barrel, spoke clearance, brake line routing, front brake bias target, rear brake pairing, tire package, and intended motorsport use. The goal is not a generic universal fit; the goal is a front brake package that works with your chassis geometry and delivers repeatable pedal behavior under sustained circuit heat.
1. Technical Consultation
We review the chassis, front suspension and knuckle setup, motorsport use, target front brake behavior, rear brake pairing, wheel package, tire compound, vehicle weight, power level, and whether the car uses OEM or custom front uprights.
2. Data Submission
For OEM knuckles, provide vehicle information, wheel specs, hub geometry, and intended use. For custom uprights, motorsport hub conversions, or non-OE rotor offsets, provide CAD files, technical drawings, hub-face data, rotor mounting dimensions, or accurate bracket mounting-point measurements.
3. Engineering Review & Approval
TTSPORT confirms rotor diameter, vehicle-specific caliper bracket geometry, rotor hat offset, wheel clearance, brake line fittings, pad compound, and pad-to-rotor alignment before production begins.
If you are unsure whether your wheel, front knuckle, hub geometry, rotor offset, rear brake pairing, or brake line routing is suitable, Contact us before ordering so the engineering team can review the build details.
Installation & Break-In
- Every TR68 kit ships with vehicle-specific radial-mount brackets and matched braided lines.
- If your chassis is not already in the TTSPORT database, send hub geometry, wheel spec, and photos so the engineering team can model the bracket, confirm rotor offset, and validate pad-to-rotor alignment before production.
- Choose Ø355 mm for tighter tracks, lower-mass cars, or wheel-clearance-limited builds.
- Choose Ø378 mm as the balanced choice for most track-day and time-attack builds.
- Choose Ø390 mm for high-speed circuits, heavier platforms, and endurance use.
- Standard 0–600 °C / μ 0.38 pad covers HPDE and club-level track use.
- Racing 0–750 °C / μ 0.45 pad is the call for sustained high-energy stops.
- Bedding-in is required before track use to transfer pad material evenly to the rotor face and stabilize the friction surface.
Frequently Asked Questions
Is the TR68 a front or rear kit?
Front axle. It's a 6-piston front big brake kit. Pair with a matched TTSPORT rear kit to maintain brake balance.
What rotor size should I choose?
Ø355 mm is suited to tighter tracks, lighter cars, or wheel-clearance-limited builds. Ø378 mm is the all-round track-day choice. Ø390 mm gives maximum leverage and heat capacity for high-speed circuits, heavier platforms, or endurance use. All three are 36 mm thick.
What's the difference between the standard and Option B Racing package?
Option B uses a racing-grade heat-treated high-carbon iron ring with a wave-slot face and the higher-temperature pad, 0–750 °C with μ ~0.45. It's built for sustained high-energy braking. The standard package is suited to club track and HPDE use.
Will it fit under my wheels?
Recommended wheel size is 18 in or larger, but final clearance depends on wheel design, spoke shape, and barrel offset. Send your wheel spec and TTSPORT will confirm before shipping.
Are the rotors serviceable?
Yes. The two-piece design lets you replace just the friction ring when it is worn or cracked, reusing the aluminum hat and hardware. This is a major cost saving over consecutive track seasons.
Does the kit include brake lines and brackets?
Yes. Each kit ships with vehicle-specific radial-mount caliper brackets and three-layer PTFE / SUS304 / PVC braided lines with application-correct fittings.
Ready to Spec Your TR68?
Tell us your chassis, wheel size, and intended use — track day, time attack, or endurance — and we'll confirm rotor diameter, pad compound, rotor hat offset, bracket availability, and brake line fittings.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
Great portable display for the price.
Size: 15.6" 1080P
This monitor works very well. I bought because I needed an extra monitor for my iPad on my work desk. But I don’t have an outlet at this desk. The iPad powers the monitor just fine, though it drains the battery pretty quickly. I ended up also buying a 20ft USB-C cable and running that to the nearest outlet to power the monitor and my iPad. I also have a little phone holder standing the display up.
The quality is pretty good for the price point. Definitely not my highest quality screen. It's perfect for spreadsheets and the colors are very passable anyway.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Really good.
Size: 15.6" 1080P
Perfect size. Love the cover that comes with it. Easy storage and portability. Perfect to work on the move. The screen itself looks really good for the price. I connected with the type c and turn on and off as my computer does. Amazing and easy to connect. Doesn't flickers.
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Reviewed in the United States on May 2, 2026
★★★★★ 4
Overall great value, for the stated purpose of being a portable monitor
Size: 15.6" 1080P
This is a review of two monitors:
MNN Portable Monitor 15.6inch FHD 1080P (no model number listed) M156F01 is marked on the box
Arzopa Portable Monitor, 15.6'' 1080P model number: “S1 Table”
I ordered the Arzopa monitor first, as kind of an impulse buy. I was going to be traveling and wanted to take my mini Ryzen 9 PC with me, but it had no monitor. I found the Arzopa monitor had good reviews and the price was right so I ordered. Then later I discovered it was a MATTE panel. I’m not sure how I missed that earlier, but I would NOT have ordered it if I knew that it was matte.
Matte finishes on monitors are supposed to be easier on eyes as the matte surface supposedly reduces glare. But in my experience, there is a problem with this feature. First, any monitor positioned properly should never have a problem with glare. For example, you don’t position a monitor facing a large window or another source of strong light. If your monitor is positioned correctly, glare should not be a possible problem to be solved. Second, the matte finish on most monitors I have seen tends to greatly distort the picture quality. Imagine you are standing outside at noon, but the area you are in is foggy. The view you have of your surroundings (through a light fog) is similar to the picture quality of any matte finish monitor. At least, in my experience.
I was sitting in front of my two large (not portable) monitors, thinking about the mistake I made in ordering a matte finish portable monitor. And I realized…I was so used to using dual monitors that I would really want two monitors for travel, also.
I read some reviews of the MNN monitor and someone described it as a GLOSSY panel. Perfect. I decided to order the MNN to use as my “primary” travel monitor with the Arzopa to be used as my “second” monitor for a dual monitor setup while traveling. That led to mistake number 2. They are both matte finish. When I realized this, they had both shipped. And they were delivered very quickly , both arriving on the same day.
I decided to give these monitors a try, and I’m glad I did. While they are both described officially as “matte”, the picture qualify is closer to what I would expect from a true “glossy” surface computer monitor. And they both have much more than acceptable image quality.
So to compare them:
FEATURES:
Their features are identical other than their physical controls. For adjusting these monitors, there is a difference between them, and I PREFER one over the other, as far as controls go.
Arzopa has multi-function push buttons on the left to adjust settings like brightness/contrast.
MNN has push-buttons and a teeny tiny joystick on the right to adjust settings like brightness/contrast. I think this is an odd design decision for a -portable- monitor.
The Arzopa controls are both more intuitive and (I believe) probably more sturdy / more likely to be reliable over time. We’ll see if the tiny joystick of the MNN survives a few trips bouncing around in my checked bags.
DISPLAY QUALITY
I was very pleasantly surprised by the image quality of both of these monitors. I would rate them both a solid 9/10 on image quality. I’ve seen better, but only with OLED panels. Between the two if I had to pick a winner for image quality it would be the MNN. But the difference is so slight. I think they both deserve a “9”. While I can tell they are both matte (and I do not like that) the matte finish of these monitors is not as “foggy” as most matte monitors. It’s not matte enough to detract from the overall image quality, which is great.
The factory settings of both monitors had the brightness (black lefel) set too high. Brightness is what controls how “black” black items will appear. If the Brightness is set too high, then something which should be color black will appear to be gray or (worse) even light gray. After I turned down the brightness a bit on both monitors, the black level of both was very satisfying.
Speakers: I would never try to use speakers on a portable monitor, so I can’t comment on this. I don’t think the Arzopa even has speakers, but it doesn’t matter, as I would not use those.
STAND:
They have virtually identical magnetically attached pleather stands that can be used to support the monitors in vertical or horizontal orientation. The magnets on both are pretty weak. However, it should be adequate for use on a solid desk or table. You might not be happy on an airplane if you hit turbulence at all.
Summary and suggestion for improvement:
I would give both of these a 4-star rating on the Amazon scale. To earn a 5-star rating I would suggest:
1) Replace the magnetic stand with something that attaches to the monitor more firmly.
2) Include a USB-C cable with a right-angle connector on one end. For dual monitor use, these both have cables sticking out the left side. If you want to set them side by side, you need to keep them about 2” apart, because the cables interfere with setting them close together, like you want to. The most obvious solution would be a right-angle USB-C cable. I have ordered one. But it would cost nothing for Arzopa and MNN to include this.
3) Make the above changes without increasing the price. If you could do that, I would rate these monitors a solid 5/5. There are better monitors for sale. But for the stated purpose and price? These are close to what I would want. Very close.
FINAL THOUGHT: (Which One Should I Buy?)
There are many portable monitors available with plenty of options in the same relative price range. The two I am reviewing here are a couple of the most highly rated. If you are trying to choose between these two specific monitors, I would recommend you buy the Arzopa. While the MNN has slightly better image quality, they both have really good image quality. I think the design of the Arzopa is just a bit more appropriate for the stated purpose of being portable. If you are leaning toward the MNN however, I would not discourage you from buying it. If you’ve narrowed down your decision to these two specific monitors, I don’t think you can possibly choose “wrong” if you buy only one of them. They both exceeded my expectations.
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Reviewed in the United States on February 16, 2025
★★★★★ 5
Great product
Color: Black, Size: Case for iPad (A16) 11th/10th Generation 11/10.9''
Easy to install, Really fit well, durable and look good and the customer service was really nice when I need something
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
Great case - does its job!
Color: Black, Size: Case for iPad (A16) 11th/10th Generation 11/10.9''
This is a great case for a kid (or adult) who is rough on their iPad. My kids iPad has been dropped, thrown, etc. and the case has done its job. We like having the built in screen protector which is fairly easy to clean. The case has a strap and a kickstand if needed and looks professional if that’s important to you. Worth the money!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026
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