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Hope RX4+ SL Post Mount Disc Brake Caliper
- In stock On the shelf in our own warehouse. Order before 2pm and it is despatched the same working day; bikes we build are built, safety-checked and despatched in 2-3 working days.
- In stock with our supplier Not on our shelves, but our supplier has it or it is already on its way to us. We bring it in as soon as you order, and the despatch estimate shown allows for that.
- Out of stock Neither we nor our supplier has it right now. Where a date is shown, more is on order and you can order now to secure one from that delivery.
- Stock to be confirmed Not on our shelves, and our supplier does not send us stock figures for it, so we cannot say how soon we could get one. Use "Check availability" and we will ask them and email you back.
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About Hope
Hope Technology is based in Lancashire, North UK and operates a 24-hour facility to produce premium quality CNC machined and anodised bike parts. Their top-notch products range from hydraulic disc brakes, hubs and wheels, stems and cranks to high output lights, and much more. The precision and tolerance of their products guarantees the highest performance and longevity.
Details
For 2026, the RX4+ has been refreshed as the RX4+ SL, featuring a new bore cap that adopts the narrower design first introduced on the GR4 and TR4 to reduce overall caliper width and improve compatibility with a wider range of frames. It also incorporates the bleed nipple design from the RX2, making bleeding simpler and cleaner. Together, these focused updates make the RX4+ SL more user-friendly while maintaining the powerful, reliable performance riders expect.
Features
- DOT and Mineral oil compatible versions (Please note that these system will work only with their specified oil)
- New bleed nipple design for easier/cleaner bleeding
- New bore cap design decreases overall width of the caliper for better frame compatibility
- Slimline 4 piston lightweight design
- Monobloc design creates a stiffer caliper reducing the fuzzy lever feel and brake pad rub
- Available in all Hope anodised colours
- Top entry pad fitting
- CNC machined from 2014 T6 aluminium
For Use With DOT Oil Systems Only
SRAM compatible calipers drop bar brake systems (DOT fluid)
- SRAM Red eTap AXS
- SRAM Red
- SRAM Force eTap AXS
- SRAM Force
- SRAM Rival eTap AXS
- SRAM Rival
- SRAM Apex
- SRAM S900
For Use With Mineral Oil Systems Only
RX4+ Caliper is designed to work with Shimano and Campagnolo dropbar brake systems.
Shimano Compatible Calipers
- Dura-Ace Di2 R9270 / R9170 / R9120 / R9200
- Ultegra Di2 R8170 / R8100 / R8070 / R8170 / R8020
- 105 Di2 R7170 / R7020 / Di2 R785 / RS685
- GRX RX820 / RX810 / RX600 / RX400 / RX815 Di2 / RX817 Di2
Campagnolo Compatible Calipers
- Ekar
- Super Record
- Record
- Campagnolo H11
Note: Not suitable for IS mount fork and frames.
