Kuat Piston Ion Review

If you've wandered in here wondering whether the Piston Ion is an upgrade over the Kuat Piston Pro, it is not. While the rack is significantly more capable and can accommodate larger and heavier bikes, it gives up some of the super user-friendly features that made us love the Piston Pro and Piston Pro-X.

Ease of Everyday Use

The Piston Ion is a massive rack, measuring 58.4" across and mounted to a super-wide central mast. While this gives the rack enhanced capability and stability, it feels big, even on a large vehicle. Classic tire hold tray racks have earned a solid reputation for being easy to use and not touching your frame or rims, but the Piston Ion leans so far into “solid hold” that it abandons some of those tenets.

As someone who uses a Piston X daily, I was excited to try this rack and experience another awesome Kuat product. The included ramp makes getting your bike onto the rack much easier; the clamping and strapping afterward are a bit more complicated than with other models. The Piston Ion incorporates a front wheel chock and a rear wheel strap, so the rack is no longer multi-directional. You can slide the chock and strap fore and aft on the tray, but these features limit the lateral adjustment you can realistically make. The front wheel chock doesn't change your loading protocol, but the rear wheel block and strap do. The rear wheel strap feels far less engineered than most Kuat features, and the interference it encounters with the wheel hold arms was a constant source of contention. Kuat says that you needn't use the rear wheel strap unless your bike is over 70 pounds or has fenders. With the wheel strap removed, it feels like you could mount bikes in either direction, but the front and rear wheel chocks are different shapes, so it's not advised.

When you approach the rack, a simple foot pedal lets you deploy it without using your hands, but that foot pedal now has a safety lock, and what was once a one-foot operation is now a two-handed process. You can disengage the lock when the rack isn't in use, but you need to reengage it while hauling bikes. It's an added step, and while it likely increases safety, it makes the experience feel a bit more cumbersome.

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Once the rack is in the load position, deploy the wheel hold arms; unlike other premium racks from Kuat, this is now a two-handed operation: one hand pushes the lever in while the other raises the wheel hold arm. If you're lifting a bike into place, it's no different than any other rack. If you're using the loading ramp, you can then mount the ramp to the end of the tray.

On many occasions when we loaded a bike using the ramp, the bike's wheel would effectively trap the ramp in place. To remove the ramp, we had to contract it to its smallest size and lift the bike wheel that was preventing it from being removed. When not in use, the ramp needs to be stored inside your vehicle. Everyone in our test group tried to secure the ramp to the rack, but it's just a couple of millimeters too wide. It would be nice to see a ramp that retracts into the tray or can at least be stored on the rack itself without having to live inside your vehicle.

With your bike now in place, the wheel hold arms fold down to secure your wheels. Since chock blocks back both wheels on the tray, the hold is significantly tighter than you'll find on most wheel hold racks of this general style. Adjusting for different wheel sizes is super simple and requires no tools; simply pinch the tire arch and move it to the desired location. Unlike other Kuat racks, there are no markings on the holes, so you have to guess-timate that you're putting the arch in the proper spot.

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The rack can also accommodate bikes with fenders, but it feels clunky and relies on a Velcro strap rather than the rack's solid structure. The test bike we had with fenders used fender flares (little rubber pieces at the end of the fender that prevent the rider behind you from being sprayed.

With the rack folded against the vehicle, it has a large presence but a slim profile and sits fairly close to the vehicle. Also consider where your rear-view camera is located. On our test vehicles with centered rear-view cameras, they looked directly at the rack's wide central mast, effectively blocking the camera's view.

Ease of Removal and Storage

While it's easy to install and remove the Piston Pro X, other models perform better in this metric. It is still fairly user-friendly, but several steps make it a little fiddlier than some other attachment systems. Like most other hitch-mount tray racks, it is also pretty heavy and takes up storage space. This feels more important than it gets credit for. Anyone who has lived with a rack that constantly falls over or needs support when stored will likely appreciate how this rack sits in your garage.

If you opt for the license plate holder or LED light bars as optional features on this rack, you'll need to plug and unplug the rack from your trailer accessory port when installing and uninstalling. Aside from the weight and cumbersome shape, the process is simple.

If you prefer to keep the rack mounted full time, it sits close enough to the vehicle that it doesn't feel like you need extra precautions. If you frequently drive off-road, consider the hitch bar length and its impact on your departure angle. Also, the first thing to hit a rock will likely be the soft rubber hitch cam handle.

If the rack will live on your garage floor for half the year, the folded size is about 59 inches wide and 23 inches tall. We store some racks on shelves in our warehouse, and this one felt a bit too hefty to lift on and off our shelving unit, but your mileage (and strength) may vary.

Versatility

Versatility is a strong suit of the Piston Ion; few racks can carry heavy bikes on so many vehicles. 18" wheels, no problem; 32" wheels, you're covered. 90-pound e-bike, yup; mount on an RV or back of a 5th wheel, absolutely. Wanna go off-roading? You can do that too, but Kuat recommends a 50-pound per-bike weight limit if you're 4x4ing.

This rack is only available with a dedicated 2-inch hitch mount, but they do sell an adapter that allows you to use it on a 2.5" hitch. You can not add additional trays for 3- or 4-bike compatibility, but you can carry bikes with wheelbases as long as 57" and tires up to 4.8" wide. If you're wondering if you can put one bike that weighs more than 100 pounds on the rack and leave the other tray empty, Kuat says no.

Security

Rack security always involves some tradeoffs with convenience. The Piston Ion uses a hand-tightened cam hitch system, which prevents the rack from wobbling and holds it secure in your receiver. Some Kuat racks use an 8mm security wrench to tighten the cam hitch system, which prevents someone without the special wrench from loosening your rack. This feature also prevents you from removing the rack if you misplace the special wrench. So the Piston Ion trades a bit of security for convenience here, and that isn't a bad thing because the rack (loose or not) is still locked inside your hitch receiver.

The rack locks to your vehicle with a beefy locking hitch pin that is keyed to the same code as the semi-integrated cable lock. This hitch lock is very stout and uses a cover to protect the keyway from water and dirt ingress. This prevents someone from making off with your expensive rack, or even worse, making off with your rack with bikes loaded on it.

When it's time to protect your bikes, the Piston Ion has you covered with a semi-integrated, high-strand 12mm cable lock. The cable is a “noose” or “lasso” style with one looped end, and it locks into the rack.

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The cable is 9.5 feet long, letting you secure quite a bit of your bikes and giving you the flexibility to route it through wheels or the rack's wheel hold arm. The rack doesn't provide a place to stash the cable as the Kuat NV rack does, so you'll need to store it in your vehicle. If you're away from your vehicle for an extended amount of time, you might consider adding a U-lock, securing the rear wheel to the tray.

Ease of Assembly

The Piston Ion is a massive rack, but that doesn't mean it's hard to assemble. Start with the central mast and hitch plate in your car's receiver; the rack is supported and in the perfect position to complete assembly. Unlike Kuat's other wheel hold racks, the Ion uses single-piece trays, which improve stiffness and give the rack its impressive weight capacity.

The rack arrives in a larger box than most racks, and it's quite heavy. Assembly involves very few steps and lets you appreciate the quality of construction and workmanship. The rack doesn't include paper instructions, but it includes a QR code that takes you to a website with comprehensive instructions. While you can assemble the rack off your vehicle, it's much easier to use a hitch to hold it in place and stabilize the heavy parts.

Durability

We've been very impressed with the durability of most Kuat racks; the Piston Ion uses a bit more plastic than the Piston Pro line. The plastic is mostly in the wheel chocks and strap, which aren't really weight-bearing, so this shouldn't be much of an issue. The rack's finish is a durable powder coat, and all of the hardware is stainless steel or automotive-grade, meaning you won't be driving around with a rusty, dilapidated rack in 5 years.

We did find the rack a bit more difficult to clean than those with smooth finishes like the Kuat Piston Pro and Kuat Sherpa. Instead of a quick rinse, we needed to use a sponge to clean the road grime that had gotten into the somewhat porous finish. On several occasions, when folding the rack up, the wheel load arms pinched the plastic wheel straps; while they didn't show signs of wear, we'd probably remove those straps and only use them when hauling 70+ lb bikes to extend their lifespan.

Should You Buy the Kuat Ion?

The Piston Ion is not an inexpensive rack. If you opt for the optional license plate mount and taillights, the rack inches close to the $1500 mark. But you'll also be hard-pressed to find a more capable rack with this level of construction quality. Some of our pain points with this rack are optional features; the wheel straps and foot lever lock don't really need to be used with standard or lightweight e-bikes, and that makes it more approachable for everyday use. If you need to carry two 70+ pound bikes, this is your rack.

What Other Hitch Bike Racks Should You Consider?

If you're not hauling hefty e-bikes, the Kuat Piston Pro or Kuat Piston Pro-X are much more user-friendly. If you're drawn to quality craftsmanship and made-in-USA products, check out the 1Up Super Duty; it's a quality piece of hardware with tons of upgrades that make it far more user-friendly.