Küat Piston Pro X Review: The King of Hitch Racks?

The Küat Piston Pro X is a fully-featured, beautifully designed bike rack for people who want the best hauling solution for their bikes and don’t mind the price. I always roll my eyes when companies or reviewers use the word ‘ultimate’ to describe a product, but using the Piston Pro X for three months kept bringing it to mind. We’ll dive into the features and execution of this rack, its build quality and practicality, in the context of my three months of testing this rack as we hauled bikes all cross Washington, Oregon, Idaho and Montana.

Küat Piston Pro X Features:

• OneTap levers allow arms to open automatically into position
• FastFit wheel chock adapts quickly to 18-29″ wheel sizes
• Foot pedal for hands-free ability to tilt the rack
• Integrated LED tail lights
• 12mm lock cable with soft-touch outer coating, won’t scuff frame
• QuickConnect compatibility to expand rack to 3 or 4 bikes
• Genuine Kashima Coated struts
• All metal construction with TIGER DRYLAC powder coating
• Locking security tool
• Flatlock hitch cam fights wobble
• Weight: about 64 pounds
• MSRP: $1389

Premium Everything

The origins of the Küat Piston Pro X actually date back to 2008, when Küat was looking to re-think bike racks and come up with a novel design. One of the most sought after features included a design with zero frame contact. Another was the ability to haul bikes with any size of tire without fiddly adaptors. Perhaps the flashiest is integrated tail lights to improve safety for you and other drivers on the road. The Piston Pro X captured all of those ideas in one package, and it really is an exceptional rack. Keep in mind, though, the price tag here is utterly premium. The nearly $1400 bottom line is enough to buy a starter road bike, or a junky new car, or his-and-hers GPS watches.

Unboxing and build quality

Let’s start with putting together the rack and the material choices. Küat‘s Sherpa 2.0 rack comes in a nifty box that makes it easier for you to set it up. No so with the Piston Pro X: Küat suggests you unbox it and slide the 2” hitch into your receiver and build it there. The process follows easily after that, with two large bolts to secure the wheel trays and some minor plug-and-play electrical connections to follow.

As I was doing this, the craftsmanship really stood out. On all of the Küat products I’ve tested, the build quality has always been of the highest caliber and I’d say they exceed the other major brands in this way. The Piston Pro X is built on a steel frame for strength, with aluminum wheel trays and keeper arms to save some weight. The arms that grip the tires are really nicely crafted from aluminum; there’s hardly a straight edge on the entire rack. The build quality also lets you carry bikes up to 67 lbs each!

How it works

There are several features of the Piston Pro X that are arguably the ‘coolest’ one. My personal favorite are the one-tap pneumatic arms that reach up to grab your bike at the push of a button. These feel deliciously over-the-top: it’s so satisfying to press the button and have the arms whoosh upward at your command. The pneumatic arms have a Kashima coating. I’m not convinced this adds a performance benefit, but it’s cool!

From there, a machined ‘FastFit’ chock in each tire arm can be positioned at pre-selected heights for whatever wheel size you have. Küat’s design here is really nice, and it’s very easy to pinch the spring-loaded brackets and reposition wherever you’d like. Much less fiddly than other systems.

Once your bike on the tray, it’s easy to keep a hand on the tire for balance while you walk around to either the front or back wheel and push the Piston Pro X arm in hard on your wheel. There’s a ton of forgiveness here, and the force applied to each wheel doesn’t need to be symmetrical. We’ve hauled mountain, road and E-bikes on the Piston Pro X with aboslutely zero issues. At this point we’ve probably put around 5,000 miles of use on the rack thanks to a busy spring of adventures.

Features and goodies

Easily the flashiest feature is the integrated electrical system. Küat build in fully functional brake and turn lights, which are nestled into the trays of the rack. These are visible whether the rack is up or down, and are powered off of a standard electrical hookup for trailer lights. Our camper van has a brake light mounted up high where drivers can see above the bikes, but it really does make sense to have turn signals on the rack.

When I’m driving a fully loaded camper van with two bikes on the back, I really try and be deliberate and signal my intentions to other drivers. The Piston Pro X lights were especially great for making turns and lane changes, since the side turn and brake lights are most easily blocked by chunky mountain bike tires. I don’t think this is the make-or-brake feature of the Piston Pro X, but it’s a nice move for peace of mind.

Another key feature is the semi-integrated cable lock. I think this is the biggest frontier for improvement. The cable itself is quite long and I’d guess around 8 feet. It’s easy to thread it through two bikes and capture both sets of wheels and rear or main triangle. It then loops through itself and plugs into the rack where your key can release it.

The bad part about this system is that cables are not hard to break through. Even though this is a premium cable that’s noticeably more burly than the one on our Sherpa 2.0, I still wouldn’t trust it against a determined thief. The flip side might be a design that locks the arms from moving; that’s a more conventional style of lock for, say, racks like the Sherpa with one main hook on the front wheel/fork. The problem with this design is that a clever thief who understands the geometry could theoretically pull the thru-axles and lift the bike out of the rack that way. I think the Piston Pro X would be similarly vulnerable if just the arms locked into place.

I guess my bottom line is that I don’t love the cable, but I’m not sure what other solution to provide. Get some good insurance on those bikes, because bike thieves suck!!

Putting it all together

Before we wrap up I want to make some general comments about using the rack. Be aware that this is a chonky ol’ beast of a wrack: the total assembled weight 63.75lbs, which is one of the heaviest ones I’ve ever used. It tipped over on me once when I’d grabbed it to move it in a bad spot, which has never happened to me with a rack before. If you need to take this on and off your vehicle a ton, consider a lighter rack (like, say, the Sherpa 2.0).

Outside of that, it’s really a total delight to use. The pneumatic arms are just so fun and cool, and for the most part they work totally great. I will say that the button to disengage them can be quite stiff if they’re on your wheels tightly. I found that pushing inward (toward the bike) on the arm before clicking the button reduced the force needed, and I’m telling myself that it also reduces the wear-and-tear on the internal teeth that hold the arm in place.

The pneumatic arms come with some additional risk of failure, I suppose. I did try to be diligent about wiping road dust off of the Kashima coating before fully compressing them, and who knows how much that’ll benefit them over time. Ultimately this rack really does need a long term perspective, and I’ll update this review if it changes over the coming months and years.

What I really loved about this rack is how perfectly it holds the bikes. With zero contact to the frame or rims, I had zero angst about putting my beloved bikes on the rack for long bumpy road trips. Most of my bikes have a little area of paint worn down to the metal on the fork crown from traditional bike racks; not so with the Piston Pro X.

Buy Now: Available from REI