Hydraulic Disc Brake Road Bike

The American manufacturer SRAM designs its own system of groups equipped with hydraulic disc brakes for road cycling. Here are its characteristics and the different technologies used.

With the advent of hydraulic disc brakes on road bikes, new technologies developed by manufacturers are on the market. To help the cyclist consumer, we set up different folders for explaining / popularize the various systems set up by brands. You will find below the components and technologies used by SRAM.

The hydraulic system SRAM: HydroR

HydroR is the name of the hydraulic system and its components developed by SRAM for road cycling with a mountain bike listed on insurancejust.

The SRAM brake levers

At SRAM, the hydraulic brake levers for stirrups / hydraulic disc brakes are available as transmission mechanics, they also incorporate the famous shift system DoubleTap own brand.

Dossier: The bicycle’s transmission system

These are controllers designed for 2×11-speed integration in hydraulic master cylinder in the joysticks. In terms of ranges, groups SRAM Red 22 , 22 SRAM Force and SRAM Rival 22 are available in hydraulic version.

Adjusting the guard

Individual adjustment of the guard is possible with technology Reach Adjust. This allows the rider to adjust the lever to the right length for her fingers.

The specificities of the hydraulic SRAM

DOT 5.1

The control system is hydraulic, so it is the fluid that circulates inside the sheaths which, pushed by a master cylinder control the caliper.

SRAM uses a specific fluid, DOT 5.1, synthetic oil which is resistant to high temperatures during heavy braking. Indeed, the bracket quickly when heating is requested, and some fluids tend to lose their effectiveness as at high temperatures.

Read the fact sheet: hydraulic bicycle brakes: Oils

In theory, SRAM found that the DOT 5.1 met 2 times longer to reach the boiling point than DOT 4, thus allowing superior performance in extreme conditions. For information DOT 5.1 is very corrosive and must be quickly wiped in case of deposit on a frame or a lever.

Learn: How to Trap hydraulic brakes for SRAM road bike?

Connectamajig

Connectamajig is the flexible coupling that allows the plant to the manufacturer or the dealer to configure the hydraulic brake systems on SRAM road in a simple, fast and convenient. It offers real ease of connection: Simply push and turn. Connectamajig works for hydraulic systems SRAM RED 22 and S-700.

2 possibilities of hydraulic braking in SRAM

As an aside, there are two possibilities in SRAM to move to the hydraulic  :

  • Hydraulic brakes on wheels
  • The hydraulic disc brakes

Hydraulic brakes on wheels see stirrups Like conventional stirrups rim, but they are controlled by hydraulic fluid. This system allows, among other things, to change his bike with classic setting to a hydraulic brake system.

Test: SRAM Red 22 with hydraulic brake HydroR

Hydraulic disc brakes have them be mounted on a specially designed frame to receive the hydraulic calipers, which are at present on the left forearm of the front fork and rear left base.

Hydraulic disc brakes

Feature: Hydraulic disc brakes for road bikes

These are the components of the brake system hydraulic disc designed by SRAM that we will detail here:

  • Brackets,
  • platelets
  • and SRAM discs.

The calipers for disc

At SRAM, it is understandable calipers with pistons 18 mm front and rear. The brackets are designed to be mounted on cyclocross bikes or road bike.

Disc brake pads

At SRAM plaquetes two types are available: Platelets are organic or metallic type, knowing that they are very rarely used for road cycling.

Mounting plates from above

Disc brake pads can be installed without removing the wheel, without having to work under the yoke or to juggle skates backwards.

  • Learning:Changing SRAM disc brake pads
  • Visit: Burnishing procedure platelets / SRAM disk: BED-IN

SRAM disk Centerline

The SRAM Centerline disk is designed so as to obtain a constant friction throughout the rotation center for reduced vibration, constant performance and silent running.

Read the fact sheet: disc or rotor assembly SRAM Centerline 6 holes

In terms of diameter, the disc rotor or in the jargon is available 140/160/170/180 or 200 mm. For the road bike, these are 160 mm discs which are generally used in SRAM. The 140mm is possible option, provided that the caliper bracket allows. Some managers do not offer this possibility and 160mm is systematic.

Dossier: What bicycle wheels discs choose for the road?

In terms of attachment to the hub, the system uses SRAM 6 holes. It is a mode that sees a great compatibility.For information, it is also possible to mount a drive on a 6 holes Shimano Center Lock hub with specific adapters.

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