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Hope RX4 Caliper Complete is no longer available at Merlin Cycles. However you may find an alternative or updated product below.
Hope RX4 Caliper Complete
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Hope RX4 Caliper Complete

This item was discontinued 12th May 2021.

If you require help finding an alternative to this product please contact customer services.

Code:: HBSPC62
Hope RX4 Caliper Complete

Drop bar compatible 4 piston calipers specially designed to work with Shimano or SRAM brake lever master cylinders, aimed for Road and Cyclocross use.


  • Drop bar hydraulic calipers to suit Shimano hydraulic drop bar set ups
  • Slimline 4 piston lightweight design
  • Monobloc design creates a stiffer caliper reducing the fuzzy lever feel and brake pad rub

Shimano Version

  • Postmount:- BR-RS785, BR-R785
  • Mineral Oil Brake Fluid Only


Sram Version

  • The RX4-SR post mount caliper can replace Force, Red and Rival
  • Dot 4 or 5.1 Brake Fluid Only
Bad Nick The braking power from the RX4’s 4 pots is undeniably substantially greater than with a standard 2 pot calliper. The Hope brake hose fittings supplied, simply from an engineering point of view, are superior to those produced by some other well known rival brands. I have also used Hope ASS braided hoses including the brake lever insert adapters , allowing the use of Hope brake line fittings all round.. All excellent quality components that allow me the confidence to really hang off my brakes when I need to.
Andy Nice looking caliper, easy to fit, but not that impressed with performance, seems less powerful than the RS785 it replaced, organic pads are quite noisy compared to Shimano organics too.