The RX4+ takes 25 years of Hope hydraulic disc brake experience into drop-bar road, gravel and cyclocross braking. A precision CNC-machined monobloc body makes a stiffer caliper, giving outstanding feel and modulation. This is the flat mount +20mm version running on DOT fluid.

Highlights

  • Slimline four-piston lightweight design
  • CNC-machined monobloc body for a stiffer caliper
  • Reduces fuzzy lever feel and brake pad rub
  • DOT version for SRAM hydraulic levers
  • Designed and made by Hope in Barnoldswick, UK

Four pistons for drop bars

Four pistons spread clamping force across a bigger pad area than typical two-piston road calipers, for more power and control with less hand effort, while the slim body keeps weight low. Hope quotes 123g for a complete post mount DOT caliper.

Mount type

Flat Mount Direct +20mm version, offered as a front (FMF +20mm) or rear (FM +20mm) caliper – choose the position in the options. Check Hope's RX4+ flat mount fitment chart to confirm rotor size for your frame and fork.

Options

ColourPosition
BlackFront, Rear
BlueFront, Rear
BronzeFront, Rear
OrangeFront, Rear
RedFront, Rear
SilverFront

Compatibility & fit

DOT caliper for SRAM Red eTap AXS, Red, Force eTap AXS, Force, Rival eTap AXS, Rival, Apex and S900. Caliper only – levers and hose are not included. Fitting, hose trimming and bleeding are a separate Tune Cycles workshop service, not included in the price – book at tunecycles.com.au/book.

Hope Technology covers its components for two years from the original date of purchase against manufacturer defects in materials and workmanship; damage from normal wear, misuse or not following Hope's recommendations isn't covered. For warranty support, return the item to Tune Cycles with your proof of purchase and we'll manage the claim for you. This is in addition to your rights under the Australian Consumer Law.
  • Slimline four-piston caliper
  • Monobloc CNC-machined body
  • Flat Mount +20mm fitting
  • DOT version for SRAM levers
  • Does not fit IS mounts
  • Made in Barnoldswick, UK
BrandHope Technology
ModelRX4+
Pistons4
MountFlat Mount +20mm
FluidDot fluid
ConstructionCNC-machined monobloc
Weight123g (post mount DOT complete caliper, Hope figure)
OptionsBlack, Blue, Bronze, Orange, Red, Silver - Front / Rear
SKU BSP-HOPRX4PFM20D
Brand Hope

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