bing tracking image
  1. Hitch Bike Racks
  2. Kuat
  3. Platform Rack
  4. 4 Bikes
  5. Fits 2 Inch Hitch
  6. Fold-Up Rack
  7. Tilt-Away Rack
Kuat Piston Pro X Bike Rack for 4 Bikes - 2" Hitches - Wheel Mount

Kuat Piston Pro X Bike Rack for 4 Bikes - 2" Hitches - Wheel Mount

Item # KU45VR
Our Price: $2,678.00
Hitch Bike Racks
This item qualifies for Free Shipping
Shipping Weight: 107 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Need help with installation?
Locate installers near me
Premium rack has arms that deploy with the tap of a lever, making loading and unloading bikes almost effortless. Arms hold your bikes securely by the wheels. Built-in LEDs use your vehicle's 4-way plug to sync with your brake lights. 1-800-940-8924 to order Kuat hitch bike racks part number KU45VR or order online at Free expert support on all Kuat products. Great prices and Fastest Shipping for Kuat Piston Pro X Bike Rack for 4 Bikes - 2" Hitches - Wheel Mount. Hitch Bike Racks reviews from real customers.
  • All Info
  • Reviews (1)
  • Q & A (0)
  • Videos (9)
  • Photos
  • Why etrailer?

Kuat Hitch Bike Racks - KU45VR

  • Platform Rack
  • 4 Bikes
  • Fits 2 Inch Hitch
  • Fold-Up Rack
  • Tilt-Away Rack
  • Electric Bikes
  • Heavy Bikes
  • Wheel Mount
  • Kuat
  • Bike and Hitch Lock

Premium rack has arms that deploy with the tap of a lever, making loading and unloading bikes almost effortless. Arms hold your bikes securely by the wheels. Built-in LEDs use your vehicle's 4-way plug to sync with your brake lights.


  • Platform bike rack carries 4 bikes using your vehicle's hitch receiver
    • Front 2 bike positions can be removed if you only need to carry 2 bikes
  • Ratcheting arms with hydro-pneumatic pistons deploy with the tap of a lever for easy bike loading
    • U-shaped bridges with tire-size selector hold your bikes securely by the wheels
  • Cradle-less wheel trays allow bikes to be rolled front to back to prevent handlebar contact
  • Integrated LED brake lights and turn signals increase safety and visibility
    • 4-Way flat trailer plug connects to your vehicle's 4-way connector
  • Spring-loaded foot and hand pedal lets you tilt and fold the rack with ease
    • Tilts with bikes loaded to access cargo area
  • Easy installation with flatlock cam system
    • Tightens rack inside your hitch to reduce movement and noise
  • Keyed-alike locks deter theft of your bikes and the rack
  • Telescoping aluminum ramp (sold separately) helps you load heavy e-bikes
  • Strap kit (sold separately) lets you carry bikes with fenders
  • Gray powder coated aluminum rack and steel hitch are corrosion resistant


  • Application: 2" x 2" trailer hitch receivers
  • Carrying capacity: 4 bicycles
  • Weight capacity: 40 lbs per bike
  • Wheel size: 18" - 29"
  • Maximum tire width: 5"
  • Maximum bike wheelbase: 53"
  • Distance from center of hitch pin hole to:
    • Closest part of rack when folded down: 10-1/8"
    • Closest part of rack when folded up: 6-3/8"
  • Carrier weight: 108 lbs
  • Limited lifetime warranty

Removable 2-Bike Add-On

The Piston Pro carries 4 bikes, however the front 2 positions can be easily removed so there's less of a load on you and your vehicle if only 2 people are going riding. When it's not needed, simply remove the front section with the included tool and throw it in your trunk or leave it at home. A single bike add-on (sold separately) lets you convert the rack into a 3-bike carrier.

Pivoting Arms with Hydro-Pneumatic Struts and Adjustable Bridges

Kuat Piston Pro X ratcheting hooks

The Piston Pro X has arms with hydro-pneumatic struts that deploy automatically by simply tapping the release levers, so you can easily load your bikes with both hands. They operate like the gas struts on your SUV that lift and support the rear hatch. The struts have a Kashima coating that keeps friction low, so they'll always open smoothly and in a controlled manner, even when exposed to water, mud, and road grime.

Kuat Piston Pro X ratcheting hooks

To load your bikes, tap the levers to deploy the hydro-pneumatic arms, set your bikes on the trays, and rotate the arms up over the wheels. Ratchets hold the arms in place, so once you squeeze the arms against the wheels there's nothing left to do. When you're ready to unload your bikes, tap the levers to release the arms - it's that simple.

Kuat Piston Pro X ratcheting hooks

The U-shaped arms have bridges that secure your bikes firmly by the wheel, so they won't scratch or scuff the bike's frame. Each arm has labelled settings for its bridge - 20", 24", 26", 27.5" and 29" tires. Just pinch the spring-loaded levers on each bridge and slide it to the corresponding tire size for each bike - no tools required.

Grooved Wheel Trays

Kuat Piston Pro X front wheel cradles

The Piston Pro X doesn't have cradles for the wheels like most platform-style bike racks. Instead, it has wheel trays that allow you to position your bikes on the rack exactly where you want them, not where the cradles dictate you place them. This helps prevent your handlebars and other bike parts from bumping into each other. Additionally, the trays have grooves in the tracks that accommodate narrow 18c road bike tires up to 5.0" fat bike tires.

Spring-Loaded Hand and Foot Pedal for Tilting and Folding

Kuat Piston Pro X Complete SecurityKuat Piston Pro X Installation

The rack tilts down with your bikes loaded. So, whether you're at the trail or the grocery store, you don't have to remove your bikes to access your cargo area. It also folds up when not in use. This leaves a smaller footprint, so you can keep the rack on your vehicle to park in your garage. And if you want to remove it, it doesn't take up as much space to store it.

Kuat Piston Pro X rear wheel cradle

The spring-loaded hand and foot pedal is easily accessible when the rack is tilted up. When you're ready to load your bikes, simply step on the pedal and lower the rack with both hands. To tilt the rack with bikes loaded, reach under your front bike and pull up on the pedal with your hand. No more crawling through your bikes or squeezing between the rack and the vehicle to hit the tilt release lever. To return it to the upright position, pull up on the lever and raise the rack until it clicks into position.

Built-In Brake Lights and Turn Signals

Kuat Piston Pro X Complete SecurityKuat Piston Pro X Installation

To keep you visible and safe, the Piston Pro X has built-in LED brake lights and turn signals. The lights are powered via the built-in wiring harness that plugs into your vehicle's existing 4-way connector. The lights are visible whether the rack is in use or in the stowed position.

Easy Installation

Kuat Piston Pro X Installation

The rack is easy to install. Just slide the shank into your hitch and use the included security tool to tighten the flatlock cam. As you tighten the cam, an anti-rattle wedge is deployed inside the shank to help take play out of the hitch connection.

Kuat Piston Pro X Complete Security

The security tool has a hollow-point hex indentation, so it can only be used with the Piston Pro X. This helps keep the rack secure on your vehicle. When you're done using it, simply lock it in place in the compartment at the front of the rack.

Complete Security for Bikes and Rack

Kuat Piston Pro X integrated cable lockKuat Piston Pro X hitch lock

A cable lock is included to secure your bikes to the rack. The 12-mm thick, braided steel cable threads through your bike's frames, and locks back into the rack. The cable has a soft rubber cover that won't scratch or scuff your bikes' paint. A stainless steel hitch lock is also included to secure the rack to your vehicle.

Available Accessories

Kuat Piston Pro X Ramp

An aluminum ramp (sold separately) lets you roll your heavy e-bikes on and off the rack - no heavy lifting required. The ramp telescopes to ensure it touches the ground so you don't have to lift your bike at all. It can also be used to decrease the angle of approach to make loading even easier.

Kuat Piston Pro X Ramp

A hook-and-loop strap kit (sold separately) lets you carry bikes with fenders. The Fender Kit Only setting on each arm indicates where to place the straps so they don't make contact with your bike's fenders.

PX22G Kuat Piston Pro X 2 Bike Tray Style Platform Rack - 2" Hitches - LED Tail Lights - Aluminum - Galaxy Gray

PXA2G Piston Pro X Add On LED Platform Rack w/Kashima - 1 Bike

Installation Details KU45VR Installation instructionsAlternate Instructions KU45VR Installation instructions

Video of Kuat Piston Pro X Bike Rack for 4 Bikes - 2" Hitches - Wheel Mount

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Kuat Hitch Bike Racks Review - 2015 Toyota 4Runner

Hi, everyone. Aiden here with Today we're taking a look at the Kuat Piston Pro X four bike rack, here on our 2015 Toyota 4Runner. Now, this is going to be a really nice premium bike rack here, capable of holding up to 40 pounds per bike and holding the bike by the wheels. Now, that's gonna mean zero frame contact making it good for our carbon frame bike here, but also make it work really well with alternative frame bikes. And if you decide to maybe only carry two bikes.

It will be good for e-bikes, too. Those two inner cradles will have a slightly higher weight capacity of 60 pounds. Now, aside from that though, the piston is a very premium rack. The big thing that makes this standout is the integrated piston arm. So, we've got buttons here that I can just hit and automatically open up these cradles to make loading and unloading really simple.

You'll notice that all of these different points for the wheels here are adjustable, really quickly and easily. So, if you're going out with a lot of friends, everyone's got a different size bike, different size wheels, or you're just getting set up for your family. You've got some kids' bikes. Everything's easy to use. Now, the one thing I will say as to the ease of use, is that it's heavy.

This is about a hundred pounds, a little over. So, getting this in your hitch, tilting it, all that is going to be a little bit difficult. I'll go ahead and tilt it, now. We've got the handle right up here by our first bike. Push that down and you can ease the rack down.

I will say easing it down isn't too bad, but we only have it loaded up with one bike. If it's fully loaded, that's gonna be a lot more difficult. But, you still can tilt it, get access to the back of your vehicle. So, if we need to change our shoes before or after a ride we can, or we can just get something out of the back. I'll close that up, and we can just lift the bike rack back up into place. You'll hear it click. Just like that, letting us know it's locked in. And then from here I can unload the bike. I'm gonna do this with one hand on the bike, just to kind of make sure it doesn't tip over here. And you'll notice that, doing this innermost one, definitely have to reach for it. So it's not the easiest thing in the world but definitely doable, especially if you've got other people with you. That'll make loading and unloading a lot easier. And then again, we can just go ahead, and ratchet those arms down. And from here, we'll go ahead and get some measurements. We'll start off with our ground clearance. There is a pretty good rise in the bike rack here. And at the back end, we are getting 30 and a half inches of ground clearance. It also does stick out quite a bit from the back of the vehicle. So, For our added length, we're gonna be looking at about, 50 and a half inches, from the back of the 4Runner to the back of the bike rack. So that does add quite a bit of length, but we can fold it upright when the bikes aren't loaded. So, if we don't wanna deal with taking this in and out of the hitch every time we want to use it, we just wanna leave it here so it's ready to go for next time we can. And here, it'll take up a lot less space. Only adding about 15 and a half inches. Now, with this though, a couple things to keep in mind. It's a very bulky bike rack, we're gonna be sacrificing some of our visibility through the back window. Our license plate here is going to be pretty much fully blocked, and our backup camera is going to have severely restricted visibility. Maybe some visibility through here, but it's not gonna work out too well. One thing you do have though, is the integrated taillights. You've gotta set here, and here. And it just plugs in through four pole wiring that is included with the bike rack, to your vehicle end. If you don't have wiring on your vehicle you will need to pick that up, but it'll give you your brake lights, turn signals, all that sort of thing, so that people know what you're doing when you're on the road. Now, down at the hitch area, we've got a tool for our anti-rattle device. So, it's not tool free. But, it's nice that the tool stores on the bike rack. So, we get the benefit of not forgetting it, but it's also a lot more secure. So, it's gonna keep things solid in the hitch and it'll lock up here whenever we're done with it. Down at the hitch though, it's working with our two inch by two inch receiver tube, and the pin is locking key-like, to that lock up top. And overall, it's going to be a really solid bike rack. If you're looking for something that isn't going to be as heavy, the NV four bike rack from Kuat, that's a little bit lighter, but if you're wanting to go for nearly half the weight, the Saris EX that is going to be a lot lighter, lot more easy to use. Maybe not some of the bells and whistles that you might find on this one here, but it is still gonna have zero frame contact, same sort of benefits of holding our bike that way, and just a lighter package. Either way you go though, it's gonna be a great fit for your 4Runner here, and get your bikes to their destination. Thanks for watching..

Customer Reviews

Kuat Piston Pro X Bike Rack for 4 Bikes - 2" Hitches - Wheel Mount - KU45VR

Average Customer Rating:  5.0 out of 5 stars   (1 Customer Reviews)

Premium rack has arms that deploy with the tap of a lever, making loading and unloading bikes almost effortless. Arms hold your bikes securely by the wheels. Built-in LEDs use your vehicle's 4-way plug to sync with your brake lights.


Review from a similar Kuat Piston Pro X in Hitch Bike Racks

Been using Kuat NV for several years. Decided to upgrade to the new PP. Setup was super easy, done in 15 minutes. As typical with Kuat, the build quality and finish are excellent.


See what our Experts say about this Kuat Hitch Bike Racks

  • Recommended Bike Rack For Carrying 4 Bikes With All Different Size Wheels
    I recommend the Kuat Piston Pro X Bike Rack for 4 Bikes # KU45VR for you. This rack is capable of carrying 4 bikes with wheel sizes from 18" to 29" diameters. The Carrier itself is one of the easiest we have to use and load your bikes as it secures the bikes in place by the wheels. This also prevents any damage to the frames or paint. A Telescoping Ramp # KU63VR is also available to make loading easier. The rack includes lights which you will be able to connect to a 4-way on your vehicle...
    view full answer...
  • Do You Have to Have 4-Way to Use Kuat Piston Pro X Bike Rack
    Good question, and it is not a necessity for your car to have a 4-way flat trailer connector in order to use the Kuat Piston Pro X bike racks. The 4-way connector that plugs in between the bike rack and the 4-way on your car (if you had one) comes separately in a parts bag, so it is not actually attached to the rack. I have added a photo for you which shows where you'd plug it in so you can see it is not connected to the rack. So you definitely do not have to use a 4-way with the rack...
    view full answer...
    Image 1 for

Do you have a question about this Hitch Bike Rack?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate hitch bike rack information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Andrew K
Installed by:
Andrew K
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Matthew S
Written by:
Matthew S
Employee Daron K
Edited by:
Daron K
Employee Jonathan Y
Video by:
Jonathan Y
Employee John S
Video by:
John S
Employee Thomas T
Video by:
Thomas T
Employee Charles A
Video by:
Charles A
Employee Conner L
Test Fit:
Conner L
Employee Aidan B
Test Fit:
Aidan B
Employee Evangeline M
Test Fit:
Evangeline M
Employee Carrie F
Updated by:
Carrie F

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.