Hope Technology XCR Pro E4 Hydraulic Disc Brake

Hope’s braking lineage is one of the longest-running and most recognizable in mountain biking. Their machined aluminum calipers and levers are unmistakably Hope, and for many riders, that’s the entire appeal: durability, serviceability, and a lever feel that’s hard to replicate elsewhere. But the XCR Pro E4 brake sits in an especially interesting corner of the lineup. It’s the brand’s lightest four-piston offering — a brake designed specifically to blend XC weight with real, trail power — and that makes it a natural match for the increasingly broad category often labeled “downcountry.”

I mounted the XCR Pro E4s on my 2021 Specialized Epic Evo, which is a 120/110mm machine that I’ve found to be far more capable than its travel numbers suggest. It’s become my most common choice for both fast, flowy loops and steeper, more technical terrain, including descents in the 1,000–2,000-vertical-foot range. On paper, the XCR Pro E4 seemed like the perfect partner: quite a bit more power than a typical XC brake, but still lighter than Hope’s burlier Tech4 (and now EVO GR4 and TR4) offerings.

Highlights

• CNC machined aluminum lever and one piece E4 caliper
• Carbon blade and titanium hardware
• Lever reach adjustment
• Hinge clamp
• Crimped hose design on caliper
• 4x16mm pistons
• Compatible with Tech 3 shifter mounts
• Colors: black, silver, smoke, blue, red, purple, orange
• Weight: 229g front, 252g rear (uncut hoses, no caliper hardware)
• MSRP: $307.42 (ex. tax) USD

Product Overview

Hope originally launched the XCR Pro series to offer an ultralight brake system aimed squarely at XC racers and weight-conscious riders. The XCR Pro lever is trimmed down compared to the Tech4: less bulk, fewer adjustments, and a more svelte profile that saves roughly 140 grams per set compared to the Tech4 E4 (now superseded by the EVO TR4). But unlike the XCR Pro X2, which uses a smaller 2-piston caliper, the XCR Pro E4 pairs that lightweight lever with Hope’s familiar, more gravity-focused 4-piston E4 caliper. Taken together, this gives you a very interesting hybrid: XC-oriented weight paired with trail-worthy stopping power.

Hope’s machining quality and finish are, as usual, excellent. They have some anodization options although I’ve always found the bare aluminum to be quite appealing, and the XCR master cylinders stand out from the rest of Hope’s lineup with titanium hardware and a carbon lever. There’s no tool-free reach adjust or bite point knob here, but a simple adjustment with an allen key and I was able to find a nice, comfortable position on the bars that I haven’t deviated from since.

Installation and Setup Process

I trimmed both hoses to fit my Epic Evo, which is pretty standard on Hope brakes. Their bleed procedure is dead simple, but it’s undeniably messy. Using the open reservoir method (rather than Hope’s optional bleed cup, which still concludes with an open reservoir anyway), I ended up with a good bit more DOT fluid to clean up than you’ll find with syringe-based systems from other brands or Hope’s latest EVO options. To Hope’s credit, it’s pretty difficult to mess up the process, and I was unsurprised that both brakes felt great after the initial bleed.

Fitment Notes

On my gen-seven Epic specifically, there’s only room for a 160mm rotor in the back, and the hefty E4 caliper uses pretty much all of the available space. On similar age bikes with the same XC/emerging-downcountry intentions, you’ll want to do a little research to confirm you won’t run into fitment issues. You probably won’t, but see below to get an idea of how little clearance I was working with.

Things got more interesting when I switched wheels midway through testing. On my new front wheel, with an Industry Nine Solix hub, spokes would actually lightly contact the E4 caliper when paired with a 180mm rotor. Ultimately, the only solution was moving to a 200mm front rotor. Problem solved (and with a little extra stopping power), but it’s a notable example of how the E4 caliper’s size can conflict with certain designs.

On Trail Performance

I’ve been using these brakes for about four months and 600 or so miles, and I’ve certainly come away impressed. We’re in a golden age for many bike components including brake systems, and while my expectations of Hope are high, the XCR Pro E4 delivers a compelling package. The primary standout traits are bite-point consistency and modulation.

These brakes bite at the exact same point, every time, through heat, cold, long rides, and repeated braking on long descents in the 1,000-2,000 vertical foot range. They have a nice, smooth lever action — not quite as silky as the Tech4, which uses bearings at the lever instead of a bushing — but the XCR power builds predictably and is very easy to modulate. This is obviously handy on steep and technical terrain, but I also enjoyed better control over manuals compared to my Tech4s, which tend to bring the front end down in a hurry at the lightest touch.

Particularly coming from stock two-piston brakes, the XCRs were very confidence-inspiring and immediately expanded what I had initially judged the Epic to be capable of.

Evolving Expectations

If there’s an elephant in the room, it’s the fact that downcountry bikes are becoming more capable than ever. Back in the 20-teens, a light 4-piston brake might have felt like overkill on many designs. Today, you could make a strong argument that modern downcountry/trail geometry calls for a bigger brake like Hope’s latest Evo GR4 or TR4 (which Johan Hjord covers here).

In my mind, these are a better option if power is the priority or your size or terrain demand something with a greater margin of error. At my weight, the XCR Pro E4 offered sufficient power and great control, with a tiny bit of weight savings to keep the lycra crowd happy. They’re ideal for bikes like the Epic Evo: capable, efficient, and meant to be ridden aggressively but not recklessly. As the category continues to evolve, the calculus could change.

A Few Imperfections

Hope’s minimal pad retraction is a known quirk, but in my experience it was much more present on the E4 caliper than the V4. It’s part of why the lever feel was so consistent (since you’re always working with pads sitting extremely close to the rotor), but the tradeoff is that rotor rub can be downright tenacious.

When I switched wheels halfway through this test and put on a brand new Hope floating rotor, I spent the night before an endurance event trying to get my front wheel to spin in blissful silence. Eventually I gave up in frustration, pulled a Tech4 off a different bike, and slapped it on the front of my Epic. In a field where probably half the bikes were $10,000+ Epic 8s, I got some funny looks with an older-gen rig rocking different brakes front and rear.

In the days after, I was able to spend some more time with the offending E4 caliper and eventually eliminate the rub, and I don’t anticipate having to mess with it for a long time. Still, it’s something prospective buyers should know.

Long-Term Durability

After several months of steep, technical riding, the lever feel has remained consistent, pad wear is very reasonable, and there are no issues with sticky pistons or lever pivots. Hope’s reputation for durability is well-earned, and they stock everything needed for a complete home rebuild of the brakes (and will for years).

What's The Bottom Line?

The Hope XCR Pro E4 is a uniquely satisfying brake. In a world where every component seems to trend toward more power, more features, and more bulk, this brake delivers a refreshing mix of refinement and restraint. It offers real four-piston capability without the overkill, and the modulation is among the best available at any weight.

On my Epic Evo, the brakes felt like the perfect match for the bike’s character: precise, composed, and quietly capable of handling big descents. They aren’t flawless. Fitment could potentially include hiccups, pad rub requires patience, and the floating rotors have always been noisy for me personally. But none of these quirks overshadow the core experience: a lightweight, reliable brake with exceptional feel and surprising power.

For riders who value modulation and weight savings as much as outright stopping force, the XCR Pro E4 is a great choice and one that really helped a capable bike come alive.

Michael Welch - Age: 34 // Years Riding MTB: 18 // Weight: 155 pounds (70kg) // Height: 5’10” (1.78m)

Michael started mountain biking in the late 2000s, which is also when he started testing gear — initially pre-production apparel for Gore-Tex. Since then, he’s worked in a few bike shops and covered biking and other outdoor pursuits for a variety of digital and print publications. He calls Asheville, NC home and is fortunate to enjoy the incredible trail access the North Carolina mountains have to offer. He’s stoked on the short-travel revolution, loves being over-biked, and could never get enough pedaling… but will convince you to get an ebike. His favorite personal bike is the one he just rode.