SUHR R740 Hydraulic Disc Brakes – First Look, Technical Analysis & Upcoming Gorilla Brakes Review
The mountain bike brake market is dominated by a relatively small number of established manufacturers, so it is always interesting when a new braking system appears with its own engineering ideas and a clear focus on gravity riding.
The SUHR R740 hydraulic disc brake immediately caught our attention at Gorilla Brakes. With a four-piston caliper, CNC-machined 7075 aluminium construction, carbon-ceramic brake pads and a distinctive anodised finish, the R740 looks like a serious attempt to compete in the trail, enduro and downhill brake market.
We have contacted SUHR and are looking forward to receiving a complete brake set for testing. We have requested a setup with 203 mm front and rear rotors, which will allow us to assess the brakes under the steep, technical and sustained riding conditions for which they have been designed.
This article is our first technical look at the SUHR R740. It is not yet a riding review. Once the brakes arrive, we will install them, bed them in properly and ride them in real UK conditions. We will then report honestly on their braking power, modulation, heat control, lever feel, brake pad wear, noise and long-term consistency.
What Is the SUHR R740?
The SUHR R740 is a premium four-piston hydraulic mountain bike brake designed primarily for downhill, enduro and gravity riding.
SUHR describes the brake as a four-piston mineral-oil system using four 16 mm pistons. The lever body and caliper are manufactured from CNC-machined 7075 aluminium with T6 heat treatment.
The overall design shares several ideas with our own HINE-R brake system, including CNC-machined construction, a focus on caliper stiffness, adjustable hose routing and serviceable hydraulic components.
Confirmed features include:
- Four-piston hydraulic caliper
- Four equally sized 16 mm pistons
- Mineral-oil hydraulic system
- 7075-T6 aluminium construction
- Full CNC-machined lever and caliper components
- Four-bearing lever pivot system
- Externally adjustable lever reach
- Split handlebar clamp
- Adjustable caliper hose angle
- Caliper cooling fins
- Carbon-ceramic brake pad compound
- Stainless steel brake pad backing plates
- Triple-layer reinforced hydraulic hose
- SRAM Matchmaker compatibility
- Automatic compensation for brake pad wear
On paper, this gives the R740 many of the features riders now expect from a high-performance gravity brake. The real question is how all of those components work together once the brakes are installed on a bike and subjected to repeated hard braking.
Why the SUHR R740 Caught Our Attention
At Gorilla Brakes, we spend a large amount of time examining brake systems, brake pad compounds, rotor surfaces, transfer layers, heat management and the causes of brake noise.
Many brakes look impressive in product photographs, but appearance alone does not determine braking performance. A successful braking system depends on the relationship between several components:
- The hydraulic leverage produced by the master cylinder
- The size and movement of the caliper pistons
- Caliper stiffness
- Lever geometry
- Brake pad compound
- Rotor thickness and braking-track design
- Heat management
- Piston retraction
- Bleed quality
- Caliper alignment
The R740 interests us because SUHR appears to have considered the complete system rather than concentrating on one headline feature.
The caliper includes cooling fins, the lever runs on four bearings, the hose uses a reinforced multi-layer construction and the supplied brake pads use a carbon-ceramic friction compound. SUHR also produces matching rotors, adapters, mineral oil and service equipment.
That does not automatically mean the R740 will outperform established brakes, but it gives us several genuinely interesting areas to investigate.
7075-T6 CNC-Machined Construction
SUHR states that the R740 is manufactured from 7075 aluminium, heat-treated to the T6 condition and fully CNC machined.
7075 aluminium is commonly selected for highly loaded components where strength and rigidity are important. In a brake caliper, stiffness matters because the caliper must resist spreading when hydraulic pressure forces the pads against the rotor.
Excessive caliper or lever-body flex can absorb part of the rider's lever input. This can contribute to a softer or less defined lever feel, particularly during heavy braking.
However, the material specification alone does not tell us how stiff the complete brake will feel. Caliper shape, wall thickness, bridge design, piston support, fasteners and machining tolerances will all influence the final result.
During testing, we will be paying close attention to whether the lever remains consistent under heavy load and whether there is any noticeable change in feel as the brake temperature rises.
Four-Piston Caliper with Four 16 mm Pistons
The R740 uses a four-piston caliper with four equally sized 16 mm pistons.
At Gorilla Brakes, we prefer four-piston calipers that use pistons of equal size. Smaller leading or trailing pistons can create a different pressure distribution across the brake pad, which may contribute to uneven pad loading and vibration resonance, particularly with harder, high-metal-content compounds. Four equally sized pistons apply more even pressure across the pad surface and can help produce consistent braking performance.
Four-piston brakes are widely used for trail, enduro, e-bike and downhill applications because they can distribute force across a larger pad area than many conventional two-piston systems.
However, piston count should never be treated as a direct measurement of braking power. Piston diameter, master-cylinder size, lever leverage, pad compound, rotor diameter and system stiffness all affect how a brake performs.
Our testing will examine:
- How easily the pistons move
- Whether all four pistons advance evenly
- How consistently the pistons retract
- Whether the brake develops rotor rub after heating
- How the lever position changes as the pads wear
- How easy the pistons are to clean and maintain
Even piston movement is particularly important. If one piston moves more freely than the others, the brake pad may contact the rotor unevenly. This can affect alignment, braking feel, pad wear and noise.
Caliper Cooling Fins and Heat Management
The R740 caliper includes external cooling fins designed to increase its surface area and improve heat transfer.
Heat is one of the most important factors in gravity braking. During a long descent, kinetic energy is converted into heat at the interface between the brake pad and rotor. That heat then travels through the rotor, brake pads, backing plates, pistons and caliper body.
If temperatures rise beyond the working range of the brake pad compound or hydraulic system, riders may experience:
- Reduced friction
- Brake fade
- A changing bite point
- Longer lever travel
- Increased noise
- Accelerated brake pad wear
Cooling fins may help the caliper release heat more effectively, but their real benefit will depend on their size, location, airflow and the thermal path through the caliper.
We intend to test the R740 on sustained descents rather than judging it from short stops on flat ground. Long and repeated braking efforts are where heat-management features become meaningful.
Carbon-Ceramic Brake Pads
SUHR supplies the R740 with what it describes as a high-performance carbon-ceramic brake pad compound mounted on stainless steel backing plates.
This is one of the areas we are most interested in investigating.
The brake pad is the point at which hydraulic force becomes friction, so its compound has an enormous influence on the character of the brake. The pad can change:
- Initial bite
- Maximum braking force
- Modulation
- Noise
- Heat resistance
- Wet-weather performance
- Rotor wear
- Brake pad lifespan
A harder, highly metallic compound may provide excellent temperature resistance and durability, but it can also transmit more vibration through the caliper. A softer resin-based compound can help damp vibration and may operate more quietly, although it can wear more quickly under heavy use.
Carbon ceramic is a broad description, so we will not know the exact characteristics of the SUHR compound until we have tested it.
We will assess the original pads before considering any alternative Gorilla Brakes compounds. Testing the standard configuration first is important because it shows how SUHR intended the complete braking system to perform.
The R740 brake pad shape also appears similar to a common Shimano four-piston pad format. We will confirm dimensions and compatibility once the brakes arrive. You can view our current Shimano four-piston brake pad range here.
Brake Pad Thickness and Replacement
The SUHR user manual shows a complete new pad thickness of approximately 4 mm, including the backing plate and friction material. It gives a minimum replacement thickness of 2.5 mm.
The R740 also includes automatic pad-wear compensation. As the friction material wears, the pistons gradually move outward to maintain the pad's working position relative to the rotor.
According to the manual, pad replacement involves:
- Removing the retaining pin
- Removing the used brake pads
- Carefully returning the pistons into the caliper bores
- Installing the new pads and spring
- Reinstalling the retaining pin and safety clip
- Realigning the caliper if necessary
Once we receive the brake, we will accurately measure the pad shape and investigate whether it is unique to SUHR or compatible with an existing pad format.
Four-Bearing Lever Design
One of the R740's more unusual features is its four-bearing lever structure.
SUHR says this arrangement is intended to minimise friction, provide a smooth lever action and reduce long-term wear. The company also says it has optimised the lever ratio to reduce the finger force required during extended braking while maintaining a linear response.
A bearing-supported lever can feel extremely smooth, but smoothness is only one part of good lever performance. We will also evaluate:
- Lever-blade comfort
- Finger position
- Reach-adjustment range
- Lever return speed
- Side-to-side movement
- Bite-point consistency
- Performance with one-finger braking
- Comfort during long descents
The shape of the lever blade looks suitable for one-finger operation, but this can only be properly assessed once it is installed and positioned alongside the grip and shifter.
Externally Adjustable Lever Reach
The R740 provides an external lever reach adjustment, allowing the rider to alter the starting position of the lever blade.
This is particularly useful for riders with smaller hands or anyone who prefers the lever to sit closer to the handlebar. Correct reach adjustment can improve control because the rider can maintain a strong hand position on the grip while operating the brake with one finger.
Reach adjustment should not be confused with bite-point adjustment. The reach control changes the resting position of the lever, while bite point refers to where the pads begin to engage the rotor during the lever stroke.
SUHR's manual notes that the reach-adjustment mechanism is set at the factory and should not be loosened excessively, as the small adjustment screw could become insecure.
Split Handlebar Clamp
The R740 uses a two-part upper and lower clamp. This allows the lever assembly to be fitted or removed without taking the handlebar grip off.
That may sound like a minor feature, but it makes installation and workshop servicing considerably easier. It is particularly useful on handlebars fitted with lock-on grips, integrated controls or accessories that would otherwise have to be removed.
The official installation instructions specify a lever-clamp tightening torque of approximately 2–4 Nm. A torque wrench should always be used where possible, especially when fitting brake levers to carbon handlebars.
SRAM Matchmaker Compatibility
SUHR lists the R740 as compatible with SRAM Matchmaker-style shifter integration.
An integrated shifter mount can reduce the number of clamps on the handlebar and provide more adjustment for the shifter position. However, the most important factor is whether the available range allows the brake lever and shifter to be positioned independently enough for the rider's preferred setup.
We will assess the mount with a SRAM drivetrain and examine how much horizontal and rotational adjustment is available.
Triple-Layer Hydraulic Hose
The R740 uses a three-layer hydraulic hose consisting of:
- A fluoropolymer inner tube
- A Kevlar-fibre reinforcement layer
- A protective nylon outer layer
SUHR says this construction improves resistance to pressure, heat, bursting and abrasion.
Brake-hose expansion can influence lever feel. When hydraulic pressure rises, any expansion within the hose absorbs a small amount of lever movement. A well-reinforced hose can therefore help produce a more defined and consistent feel.
We will inspect the hose flexibility, external diameter, fitting quality and routing behaviour. A hose needs to resist expansion without becoming so stiff that it is difficult to route cleanly around the frame.
Adjustable Caliper Banjo
The hose enters the R740 caliper through an adjustable banjo fitting.
The hose angle can be changed by carefully loosening the banjo bolt, rotating the hose into the required position and retightening the fitting. This can help achieve cleaner routing on frames where the rear brake hose approaches the caliper from an awkward direction.
Any banjo adjustment must be performed carefully. Loosening a hydraulic connection can potentially allow fluid to escape or air to enter the system. The lever should always be checked after adjustment, and the brake may require bleeding if the lever feel changes.
SUHR Mineral-Oil Hydraulic System
The R740 uses mineral oil rather than DOT brake fluid.
Mineral-oil systems are popular with many riders and workshops because the fluid is generally easier to handle during routine servicing. However, mineral oils are not universally interchangeable.
SUHR specifically instructs users to use genuine SUHR mineral oil. Introducing an unapproved fluid could affect seals, lubrication, fluid stability and braking performance.
The manual describes a two-port bleed procedure using:
- A syringe at the caliper
- A bleed tube
- A bleed funnel at the lever
- A caliper bleed block
- SUHR mineral oil
Fluid is initially pushed from the caliper towards the lever. The lever is then operated to help remove air from the master cylinder and caliper before the bleed ports are closed.
We will assess how straightforward this procedure is in a normal workshop and whether the brake is sensitive to caliper angle, lever angle or trapped air.
Supplied Fully Bled
The SUHR manual states that the brake system is supplied fully bled. The documented box contents include:
- The hydraulic brake system
- Brake pads
- M6 × 19 mm caliper bolts
- Olive sets for hose installation
The complete brake package shown by SUHR includes front and rear brakes, hoses, spare pads and installation hardware presented inside a protective case.
Once our set arrives, we will document exactly what is included and whether additional adapters or bleed equipment are required for installation.
SUHR High-Performance Disc Rotor
SUHR offers a matching six-bolt rotor with a heavily drilled braking track, chamfered outer edges and a lightweight internal structure.
The company says the dense hole pattern is intended to help control temperature, while double-sided grinding creates a smooth braking surface. The rotor also receives a passivation treatment intended to improve corrosion resistance.
Rotor design can have a major effect on brake behaviour. The pattern and percentage of open area influence:
- Pad cleaning
- Heat transfer
- Pad wear
- Vibration frequency
- Noise
- Lever feedback
A highly drilled rotor may help remove water, dirt and worn friction material, but it can also create more leading edges passing beneath the pad. Whether that produces a smooth feel will depend on the pattern, rotor stiffness and brake pad compound.
We have requested 203 mm rotors for both the front and rear. This will provide a consistent basis for testing the brakes on demanding terrain.
The SUHR manual states that the rotor should be replaced if it becomes seriously deformed or wears below 1.55 mm. We will measure the new rotor thickness when the system arrives and monitor wear during testing.
Installation and Caliper Alignment
The R740 uses a conventional post-mount caliper and can be combined with the appropriate adapter for different rotor sizes and frame or fork mounts.
SUHR specifies a caliper mounting-bolt torque of approximately 8–10 Nm. Rotor bolts should be tightened diagonally to approximately 5–6 Nm, following the rotor's indicated direction of rotation.
The manual recommends centring the caliper by operating and holding the brake lever while the caliper bolts are tightened progressively. This is a useful starting method, although a final visual alignment is often needed to ensure equal clearance on both sides of the rotor.
During installation, we will check:
- Caliper clearance with a 203 mm rotor
- Adapter alignment
- Hose-routing options
- Lever and shifter positioning
- Piston retraction
- Rotor clearance
- Whether the factory bleed needs any additional attention
Bedding In the SUHR R740 Brakes
New brake pads and rotors must be bedded in before they can provide their intended performance.
During bedding-in, a controlled layer of friction material is deposited onto the rotor's braking track. This transfer layer allows the pad to interact consistently with the rotor.
SUHR advises that new brakes may require approximately 10–30 braking operations before full contact and braking force develop.
For our test, we will use a controlled bedding-in process involving repeated, progressive stops without bringing the bike to a complete stationary hold while the brakes are extremely hot.
We will not judge maximum power, noise or modulation until the transfer layer has been established correctly.
Why the Transfer Layer Matters
A brake pad does not simply grip bare stainless steel. The pad and rotor need a compatible and consistent transfer layer.
Problems can occur when a rider changes between significantly different friction compounds without preparing the rotor. For example, an existing organic or resin transfer layer may not accept a harder metallic compound evenly.
This can lead to:
- Uneven friction
- Disc slip
- Vibration resonance
- Squealing
- Poor initial bite
- Inconsistent bedding
Before testing alternative pads in the R740, we will either use a separate rotor or thoroughly prepare the existing rotor surface. This prevents the result being distorted by an incompatible transfer layer left by the previous compound.
Riders experiencing these problems can read our detailed guide: Sintered Brake Pads: Read This to Avoid the Squeal Trap.
What Gorilla Brakes Will Test
We do not intend to produce a review based on a few car-park stops or one short ride.
The SUHR R740 will be tested across a mixture of steep natural terrain, trail-centre riding, repeated descents and typical wet UK conditions.
1. Initial Braking Power
We will assess how much braking force is available from one finger and how quickly that force develops as the lever is pulled.
2. Modulation
Maximum power is not the only measure of a good brake. We will examine how easily braking force can be controlled between light speed adjustment and near-wheel-locking force.
3. Lever Feel
We will monitor lever smoothness, free stroke, bite-point stability, return speed and any change caused by temperature.
4. Heat Resistance
The brakes will be used on sustained descents where heat can build through the rotor, pads and caliper.
5. Brake Fade
We will look for any reduction in friction or increase in lever travel during repeated hard braking.
6. Brake Pad Wear
The pads will be measured before and after the test period so we can evaluate wear rate rather than relying only on visual impressions.
7. Rotor Behaviour
We will check the rotors for distortion, pulsing, uneven transfer layers and changes in surface appearance.
8. Noise
Testing will include dry and wet trail conditions. We will distinguish normal temporary wet-weather noise from persistent vibration resonance.
9. Piston Performance
We will examine whether all four pistons move evenly, retract consistently and remain easy to maintain.
10. Long-Term Servicing
We will assess pad replacement, hose adjustment, bleeding, access to service parts and the general practicality of maintaining the brakes.
How Will the R740 Compare with Established Brakes?
It is too early to say how the R740 compares with brakes from Shimano, SRAM, Hope, Magura or Brembo.
Specifications alone cannot provide a reliable answer. Two brakes with similar piston counts and rotor sizes can feel completely different because of their lever geometry, hydraulic ratio, caliper rigidity, brake pad compound and rotor design.
Our eventual comparison will concentrate on measurable and practical differences, including:
- Required finger force
- Initial bite
- Maximum power
- Modulation
- Lever consistency
- Noise sensitivity
- Pad wear
- Maintenance requirements
Until we have ridden the R740, we will not claim that it is better or worse than any established alternative.
Who Could the SUHR R740 Be For?
Based on its design and published specification, the R740 appears to be aimed at riders who need more braking support than a lightweight cross-country brake is designed to provide.
That may include:
- Enduro riders
- Downhill riders
- E-bike riders
- Bike-park riders
- Heavier riders
- Riders using long and steep descents
- Riders who prefer mineral-oil brakes
- Riders looking for something different from mainstream brake brands
Its suitability will ultimately depend on the results of our testing, availability of replacement parts and the level of after-sales support offered in each market.
Serviceability and Warranty
The supplied manual provides procedures for:
- Rotor installation
- Caliper installation
- Banjo-angle adjustment
- Lever installation
- Caliper alignment
- Brake pad replacement
- Hose fitting
- Brake bleeding
This is encouraging because a performance brake must be maintainable as well as powerful.
The manual states that the brake is covered against manufacturing faults or material defects for 24 months from the date of purchase, subject to its warranty terms and correct use.
Availability of replacement pads, seals, hoses, fittings and individual lever or caliper components will be another important part of our assessment.
Could Gorilla Brakes Produce Replacement Pads for the R740?
As an aftermarket brake pad manufacturer, we are naturally interested in the R740 pad shape.
Once we receive the brakes, we will measure the backing plate and examine:
- Pad dimensions
- Friction-material area
- Backing-plate thickness
- Spring design
- Caliper clearance
- Heat transfer into the pistons
If there is sufficient demand and the brake performs well, we may explore developing Gorilla Brakes replacement compounds for the SUHR R740.
Any development would begin with proper testing. Different brake systems respond differently to pad hardness, metallic content, compressibility and backing-plate construction. A compound that works well in one caliper may not be the best choice for another.
Our First Impression
Before riding the R740, our first impression is that SUHR has created a visually distinctive and technically interesting brake system.
The most notable features are:
- The 7075-T6 CNC-machined construction
- The four-bearing lever mechanism
- The four equally sized 16 mm caliper pistons
- The cooling-fin caliper design
- The carbon-ceramic brake pads
- The reinforced three-layer hose
- The mineral-oil hydraulic system
- The adjustable banjo and split lever clamp
These features suggest that the R740 has been developed as a complete gravity braking system rather than simply as an attractive lever and caliper.
However, the trail will reveal what the specifications cannot.
We Are Looking Forward to Testing the SUHR R740
We have requested a complete SUHR R740 brake set with 203 mm front and rear rotors and are looking forward to putting it through a full Gorilla Brakes test.
Once the brakes arrive, we will document the installation, bedding-in process, first rides and long-term performance. We will also inspect the pad shape and investigate future replacement-pad options.
Our final review will answer the questions that matter most to riders:
- How powerful are the SUHR R740 brakes?
- How much modulation do they provide?
- Does the lever remain consistent on long descents?
- How well do the caliper cooling fins control heat?
- How quickly do the carbon-ceramic pads wear?
- Are the brakes quiet in wet UK conditions?
- How easy are they to install and bleed?
- Can they compete with established enduro and downhill brakes?
Until then, the R740 remains one of the most interesting new braking systems we have seen recently.
Learn more on the official SUHR R740 product page, and check back with Gorilla Brakes for our full installation guide and real-world riding review.
Important: This is a first-look technical article based on the manufacturer's published information and service documentation. Gorilla Brakes has not yet completed independent riding or laboratory testing of the SUHR R740. Performance conclusions will be added after the test set has been installed and evaluated.