RX4 Postmount Caliper

The RX4 caliper builds on 25 years’ experience designing and manufacturing hydraulic disc brakes and transfers the knowledge and skills acquired into the world of Road and Cyclocross dropbar brakes. A precision CNC machined monobloc design results in a stiffer caliper to give unrivalled feel and modulation. Choose from Shimano or Sram depending on your lever.

Key Features

  • Post mount front and rear hydraulic caliper to suit dropbar set ups
  • Shimano or Sram specific caliper
  • Slimline 4 piston lightweight design
  • Monobloc design creates a stiffer caliper reducing the fuzzy lever feel and brake pad rub
  • Available in Black, Silver, Red, Blue, Purple and Orange
  • Top entry pad fitting
  • CNC machined from 2014 T6 aluminium
  • ***Please note***Shimano and SRAM brands belong to a third party and have no relation with Hope Technology’
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"Built for adventure"

RX4-SH Caliper - Designed to work with Shimano and Campagnolo dropbar brake systems
(Mineral Oil, Shimano recommended for Shimano application, Campagnolo/Magura recommended for Campagnolo)

Dura Ace Di2 R9170                                                         Super Record                                    
Dura Ace R9120                                                                Record                 
Ultegra Di2 R8070                                                            Campagnolo H11             
Ultegra R8020   
105 R7020                          
Di2 R785                              

RX4-SR - Designed to work with Sram dropbar brake systems (Dot Fluid)

Sram Red eTap
Sram Red
Sram Force
Sram Rival
Sram Apex


Weights from:
RX4 SH - 102g Inc pads.
RX4 SR - 92g Inc pads.


**Note - Not suitable for IS mounts