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Premium Kashima-Coated Protection. 67 lb E-Bike Capacity. Zero Frame Contact.
The Ultimate Heavy-Duty Bike CarrierThe Kuat Piston® SR is an all-metal, single-bike tray engineered for those who demand the highest level of security and ease of use. Whether you are hauling a lightweight carbon road bike or a 67-pound electric mountain bike, the Piston SR provides a rock-solid mounting solution for your Leitner Designs ACS Forged Bed Rack.
Featuring Genuine Kashima-coated struts and hydro-pneumatic arms, this rack doesn't just hold your bike—it protects your investment. With a simple tap, the OneTap™ arms open wide, grasping your tires securely without ever touching your bike’s frame.
The Problem & The Solution:The Pain: Traditional racks use plastic straps that scratch frames, struggle with heavy e-bikes, and require tools to adjust for different wheel sizes.
The Solution: The Piston SR features an All-Metal Construction, a 67 lb weight limit, and the FastFit™ tool-free system to change wheel sizes in seconds.
Key Features: Küat Piston SR
Hydro-pneumatic tire arms open automatically with a simple tap, allowing for effortless one-handed loading.
The same legendary coating found on high-end MTB suspension ensures smooth operation and incredible durability.
Quickly adjust for wheel sizes from 18” to 29” in seconds without ever reaching for a tool.
The arms grasp only the tires, eliminating the risk of rubbing, scratching, or damaging your bike's frame.
A 10mm high-strand integrated cable lock with a soft-touch coating keeps your bike secure at every stop.
Built to last with an all-metal construction and automotive-grade finish on all hardware for maximum weather resistance.
Heavy-duty design safely transports bicycles and electric bikes weighing up to 67 pounds.
The Piston SR arrives 100% assembled. Simply mount it to your rack and start your adventure.
Engineered to Exceed ExpectationsKüat has combined form and function with stainless steel hardware and a sleek, rugged finish. This tray is rigorously tested to withstand off-road vibrations and high-speed highway travel, providing peace of mind and lasting value for years to come.
67 lbs Weight Capacity 18"-29" Wheel Diameter 10mm Integrated Lock Kashima Strut Coating
"The OneTap arms are a game changer. I used to struggle with plastic straps while trying to balance my heavy e-bike on the rack. Now, it's secured in seconds. The Kashima coating looks incredible on my Leitner rack, and the build quality is obviously superior to anything else I've owned."
- Mark S., Avid Mountain Biker Required Compatibility NoteREQUIRED PART: To attach the Küat Piston SR to your Leitner ACS Forged Bed Rack, you must purchase the compatible LEITNER Forged Bike Mount.
| Feature | Küat Piston SR | Standard Bike Trays |
|---|---|---|
| Frame Contact | ✓ Zero (Tire Grip Only) | ✗ Common (Strap/Clamps) |
| E-Bike Capacity | ✓ High (67 lbs) | ✗ Low (35-45 lbs) |
| Adjustment | ✓ Tool-Free FastFit™ | ✗ Requires Tools/Pins |
| Construction | ✓ All-Metal / Kashima | Plastic Components |
| Assembly | ✓ Fully Assembled | Complex Assembly Required |
The Piston SR is designed to work as part of the Leitner ecosystem. By mounting this tray to your ACS Forged rack, you keep your truck bed free for other gear while keeping your bike safe and accessible.
Fits 18” to 29” Wheels Up to 5" Fat Tires (with accessory kit) Automotive Grade Hardware FinishNeed more? Check out the official Küat Piston SR Accessories and Additional Parts to customize your setup.
CA Residents: ⚠️ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
The Piston SR supports bikes up to 67 lbs and wheel sizes from 18" to 29". As long as your e-bike falls within these specs, it will fit perfectly. For fat tire e-bikes, a separate adapter may be required.
Yes, the Piston SR includes a 10mm high-strand integrated cable lock with a soft-touch coating to protect your bike components from scratches while parked.
Yes. To properly secure this Küat tray to a Leitner ACS Forged bed rack, the Leitner Forged Bike Mount is required to ensure a perfect, vibration-free fit.
Genuine Kashima coating reduces friction and increases surface hardness. In the Piston SR, this ensures the hydro-pneumatic arms operate smoothly even after years of exposure to mud, dust, and rain.
California Residents
Prop 65 Warning- Product may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov
Proposition 65 is a California law passed in 1986. Its goals are to protect drinking water sources from toxic substances that may cause cancer and birth defects and to reduce or eliminate exposures to those chemicals generally, for example in consumer products, by requiring warnings in advance of those exposures.
The regulation requires the State of California to revise and republish yearly a list of chemicals known to the State of California to cause cancer or birth defects or other reproductive harm. The current list contains over 900 naturally occurring and synthetic chemicals. This regulation also requires manufacturers to place warnings on products that contain any of the chemicals listed by the State of California. No other states require warnings of this nature, and products with Prop 65 warning language are legal to sell in all states. Detailed information regarding requirements for compliance to the California Prop. 65 is can be found at: www.P65Warning.ca.gov
We get it. You've got a lot of choice when it comes to online retailers.
Here's why we think you should shop with us at ExtrailAuto.
The wait time was more than I anticipated even after seeing the notification of long lead times. I have to give them props for giving some compensation for the excessive wait time. Having slightly larger holes would help with fitment. Had a hard time getting the front drivers side away from the pinch weld. Eventually had to use washers to add space away from the truck. Need to update pictures and instalation video for the new sliders they are now making
All packing and shipment were great, everything was there. I had to contract out the install because of arthritis, it took them two hours and looks perfect. Zero wind noise at any speed 0 to 100.
Absolutely love my new rack and roam cases. Appreciate the Sherpa crew as well for their hospitality while the installation was taking place.
Fit and finish is excellent. Looks great on the Bronco. No whistling noise at all, some additional wind noise over 60mph but not much different than it was without the rack. Assembly was not too difficult. Instructions and videos could be a little better.
The quality and dedication of the team at Sherpa is evident from the very first interaction with them, and is further proven in the product itself. This rack is well engineered, easy to assemble, easy to adjust, and holds up incredibly well with no loosening or rattling or shifting (even after over 200 miles of driving on poorly maintained roads). Currently operating with approximately 180 pounds of gear mounted on the bed rack and no issues at all so far. I expected the vibration to work the bolts loose over time, but every time I check they're all still snug. My only regret is that I didn't pull the trigger and get this rack sooner.
First of all, the team at Sherpa is full of passion for adventure and that passion shows in the quality of their products. This roof rack looks incredible and surprised me with it's sturdiness. No loosening of hardware, even after weeks of driving. Currently holding approximately 80 pounds of gear for everyday driving, plus an additional 110 strapped on top during a camping trip (and I even stood on top of the entire loadout). No warping, bending, twisting, or slipping. The fact that this matches the bed rack perfectly in height is the icing on the cake. Easily serves as a tie off for a tarp, rain fly, hammock, or whatever you need. Perfect for modular campsite setup and quick teardown.
I bought the Sherpa Crestone rack for my 2024 4Runner TRD Pro. Incredibly well-made and excellent design. Spend the extra , to get best roof rack in the market. You won’t regret it.
This is our first roof rack that we are going to use to put a RRT (roof top tent) on for back country trips. Well-built product that came with all the nuts, bolts and washers to complete the installation. Took about 1-1/2 to 2 hours install the rack. You will another person to help place the racks on top of the Jeep for final install. Overall, a great, well-built American product
Install was super easy. The quality was great. Customer service was quick to respond to any issues! I’ve already been getting compliments on it and what brand it is. This will be great for camping this year!
This is on my tundra absolutely solid rack looks fantastic extremely modular, which is why I went this route. I can use the whole rack when traveling and over landing then rock the chase rack only when the rest is not in use, I actually use the recovery traction board mounts for my shower room set up, which works amazingly just relocated the board somewhere shown in picture keep innovating TUWAand I’ll keep purchasing.
Good looking cat shields made of stainless steel with cooling holes. Priced well, easy install, no issues. Would buy again.
Great service from their staff. Robert help me through all the process with a request I had, he responded all emails in a timely manner and provided great help.
We received it within 3 days and installed the same day. Great awning and very well made.
the tent is very nice, comfortable and roomy.
Following the instructions was fairly easy. Its better to have second person to set it up. I really like the tent and the support that from ExtrailAuto. Really recommeded! Thanks
