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RX4+ Disc Brake Caliper

2 out of 5 stars
1 Review

Style & Size:


Hope RX4+ Disc Brake Caliper

The RX4+ caliper supersedes the RX4 caliper and 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.

2014 T6 aluminium
Caliper Type
Mount Type
post mount, flat mount
DOT, mineral
140, 160, 180mm rotors
road, gravel, cyclocross

Overall Rating

2 based on 1 ratings

Review Summary

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2 out of 5 stars

February 29, 2024

Love Non-Stop Maintenance?

I've put it through the wringer

Hope brake calipers differ from others in several ways, not the least of which is four pistons. I am not a brake expert, but one thing I can tell you after three years of Hope brake calipers being on my bike is that they have to be fully serviced constantly. I have yet to see them go out of alignment in a way that only requires the usual re-centering. When they go out, it's due to the pistons. They also DO NOT live up to the compatibility claims, sorry to say. At all. My local bike shop replaced the rotor, thinking that might be the problem causing the mis-alignment, but that didn't work. The same awful squeal was a constant with these, no matter how broken in the pads became. Speaking of pads, do you also love having brakes that no bike shop carries pads for? Then these are for you. You have to order them from ebay, of all places, which means when you need them you're basically waiting for over a week every time. But hey, if you just can't get enough of maintaining your brake calipers, go for it.

John S