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HKM-776275 Ergonomic Gaming Office Chair with Swivel Design for Computer Desk Use
Ergonomic Gaming Office Chair
HKM-776275
Engineered for extended comfort, built for performance. A seamless fusion of ergonomic precision and modern design, crafted to support your every move through the longest workdays and most intense gaming sessions.
Ergonomic ExcellenceDesigned Around You
Every contour, adjustment point, and material choice has been thoughtfully engineered to deliver a seating experience that adapts to your body—not the other way around.
Adaptive Lumbar Support
A precision-contoured backrest follows the natural S-curve of your spine, cradling your lower back to reduce pressure on vertebral discs. The integrated lumbar zone maintains proper pelvic alignment, helping prevent the slouching that leads to chronic lower back fatigue during extended sitting periods.
Precision Height Adjustment
A Class-3 gas lift mechanism offers seamless vertical travel across a range of approximately 4 inches (10 cm), allowing you to fine-tune seat height from roughly 17.7 inches to 21.7 inches (45–55 cm). This ensures your feet rest flat on the floor and your knees form a healthy 90° angle, promoting optimal circulation.
360° Swivel Mobility
The chair rotates smoothly through a full 360-degree range on a reinforced nylon-composite swivel base. This unrestricted rotation allows you to reach across your workspace without twisting your torso, reducing strain on your shoulders and neck—particularly valuable in multi-monitor setups or collaborative environments.
High-Density Foam Cushioning
The seat pan is layered with cold-cure molded foam rated at a density of approximately 3.1 lbs/ft³ (50 kg/m³), a formulation commonly found in premium automotive seating. This high-resilience foam distributes body weight evenly across the sitting surface, resisting flattening and sagging even after thousands of hours of use.
Fine-Tuned Adjustability
A chair that adapts to you is the foundation of sustained comfort. The HKM-776275 offers multiple independent adjustment points to create a truly personalized fit.
Multi-Angle Backrest Recline
The backrest tilts through a range of 90° to approximately 135°, enabling everything from upright task-focused posture to a relaxed recline for reading or brief rest. A tension-adjustable mechanism lets you set the resistance required to lean back, so lighter users aren't fighting the chair and heavier users feel securely supported throughout the tilt arc.
3D Articulating Armrests
Each armrest adjusts independently along three axes: height, forward/backward position, and inward/outward rotation. This 3D articulation lets you position the arm pads precisely where your forearms naturally rest while typing or gaming, reducing shoulder elevation and wrist extension that can lead to repetitive strain discomfort over time.
Technical Specifications
Detailed measurements and material data for informed decision-making.
Seat Height Range
17.7" – 21.7" (45 – 55 cm)
Backrest Tilt Range
90° – 135°
Weight Capacity
330 lbs (150 kg)
Net Weight
48.5 lbs (22 kg)
Caster Size
2.4" (60 mm) PU Silent
Seat Width
20.5" (52 cm)
Overall Height
47.2" – 51.2" (120 – 130 cm)
Seat Depth
18.9" (48 cm)
The Science of Sitting Well
Understanding the engineering and materials behind the HKM-776275 helps explain why this chair delivers comfort that endures hour after hour.
Cold-Cure Molded Foam Technology
Unlike conventional slab-cut foams that rely on adhesives and layered construction, cold-cure molding creates the seat cushion in a single, seamless piece. The polyurethane is poured into a precision mold and cured at ambient temperatures, resulting in a foam with a more uniform cell structure. This translates to consistent firmness across the entire sitting surface and dramatically improved resistance to compression set—the permanent deformation that causes cheaper foams to develop flat spots after months of use. Independent lab testing shows that high-density cold-cure foam retains over 94% of its original thickness after 80,000 compression cycles, equivalent to roughly 8–10 years of typical daily use.
Class-3 Gas Lift Cylinder
The gas lift is the heart of any adjustable chair, and the HKM-776275 employs a Class-3 cylinder certified to ANSI/BIFMA X5.1 standards. Inside the sealed steel cylinder, pressurized nitrogen gas provides smooth, controlled vertical motion without the jerkiness associated with lower-grade pneumatic systems. The Class-3 designation indicates a thicker cylinder wall and enhanced seal integrity, rated for a minimum of 100,000 actuation cycles. This means you can adjust your seat height multiple times a day, every day, for well over a decade without degradation in performance.
Passive Postural Alignment
While many chairs claim to "correct" posture, the HKM-776275 takes a more nuanced approach grounded in biomechanics research. The backrest curvature is designed not to force your spine into an idealized position, but rather to remove the muscular effort required to maintain neutral alignment. By supporting the sacral shelf and the thoracolumbar junction simultaneously, the chair allows your paraspinal muscles to relax without letting your pelvis tilt posteriorly—the common "slump" that increases intradiscal pressure by up to 40% compared to upright sitting. This passive support strategy means you finish your day with less fatigue, not because the chair did the work for you, but because it removed unnecessary work from your body.
Silent-Roll PU Casters
The five dual-wheel casters feature a polyurethane tread bonded to a precision-bearing nylon hub. PU was selected over standard nylon or rubber for its unique combination of properties: it rolls quietly across hard surfaces, grips adequately on low-pile carpet, and—critically—does not mar or scratch hardwood, laminate, or tile flooring. The 2.4-inch (60 mm) diameter provides sufficient ground clearance to navigate over threshold strips and cable management channels commonly found under desks. Each caster is independently rated for 66 lbs (30 kg) of dynamic load, meaning the five-caster array comfortably supports the chair's full weight capacity with a substantial safety margin.
Built for Every Kind of User
Whether you're climbing ranked ladders or closing quarterly reports, the HKM-776275 adapts to your workflow and playstyle.
For Gamers
When reaction times are measured in milliseconds, discomfort is a distraction you cannot afford. The HKM-776275 keeps you locked in with a stable platform that eliminates fidgeting, while the reclining backrest lets you find the perfect angle for controller or keyboard-and-mouse play. The 360° swivel means you never need to twist awkwardly to grab a drink or acknowledge a teammate.
For Professionals
In a hybrid or fully remote work environment, your home office chair is now your primary workstation. The HKM-776275 delivers the adjustability and support expected from premium office furniture, with a design aesthetic that looks professional on video calls. The durable upholstery withstands 8–10 hour daily use without showing wear, and the silent casters won't interrupt meetings when you reposition.
Frequently Asked Questions
Answers to the most common questions about the HKM-776275.
What is the maximum weight capacity of the HKM-776275?
The HKM-776275 is engineered to support users weighing up to 330 lbs (150 kg). This rating accounts for dynamic loading during reclining and swiveling motions, not just static seated weight. The aluminum-alloy base, Class-3 gas lift, and reinforced seat plate all contribute to this robust capacity, which has been verified through BIFMA-standard cyclical load testing.
How does the lumbar support system work?
The backrest incorporates an integrated lumbar contour that follows the natural lordotic curve of the lower spine. Rather than using a separate, protruding lumbar pillow that can feel intrusive, the HKM-776275 builds the support into the backrest shell itself. The curvature is subtle enough to accommodate a range of body types while still providing the anterior pelvic support that helps maintain neutral spinal alignment during prolonged sitting.
Is the chair suitable for users of different heights?
Yes. The seat height adjusts from approximately 17.7 inches to 21.7 inches (45–55 cm), which accommodates users roughly between 5'2" and 6'4" (157–193 cm) when paired with an appropriate desk height. The backrest is tall enough at 31.5 inches (80 cm) to provide full shoulder support for most users within this range. For individuals outside this height range, we recommend checking your specific ergonomic requirements against the detailed specifications listed above.
What type of flooring are the casters suitable for?
The HKM-776275 comes equipped with 2.4-inch (60 mm) polyurethane dual-wheel casters that perform excellently on hardwood, laminate, tile, vinyl, and low-to-medium pile carpet. PU casters are specifically chosen because they combine quiet rolling with floor protection—unlike hard nylon casters that can scratch delicate surfaces or soft rubber casters that wear down quickly. For deep-pile carpet or uneven stone flooring, aftermarket rollerblade-style casters can be installed as the stem fitting uses the industry-standard 11 mm x 22 mm size.
Can the armrests be adjusted or removed?
The armrests are fully adjustable along three axes: vertical height, horizontal forward/backward position, and angular rotation inward or outward. They can also be completely removed if you prefer an armrest-free setup—simply unscrew the mounting bolts beneath the seat plate. The arm pads are topped with a medium-density polyurethane foam wrapped in the same durable upholstery as the seat, providing comfortable forearm support without excessive softness that might compromise stability during precise mouse movements.
What is the assembly process like?
The HKM-776275 ships in a single carton with all components, hardware, and tools included. Assembly typically takes one person approximately 20–30 minutes. The main steps involve attaching the casters to the base, inserting the gas lift, mounting the seat mechanism to the seat pan, attaching the backrest to the seat, and placing the assembled upper section onto the base. Detailed illustrated instructions are provided, and all bolts use the included hex key—no additional tools are required.
Purchase with Confidence
Every HKM-776275 order is backed by comprehensive coverage.
Free Shipping on All Orders
Complimentary standard delivery to your doorstep. No minimum purchase required.
180-Day Purchase Protection
Extended coverage against manufacturing defects for a full six months from delivery.
30-Day Money-Back Guarantee
Not satisfied? Return the chair within 30 days for a full refund—no questions asked.
24-Month Warranty Service
Full manufacturer's warranty covering parts and workmanship for two full years.
Every product we offer includes a 180-day purchase protection plan at no additional cost. This coverage extends beyond a standard warranty, reflecting our confidence in product quality and our ongoing commitment to your satisfaction.
The protection plan is designed to provide practical help in real-world situations. Whether you encounter a manufacturing issue, a performance problem, or an unexpected accident, our team is ready to assist with clear, fair solutions.
What Is Covered
Manufacturing Defects
We replace items with material or workmanship flaws at no charge.
Performance Failures
Free repair or replacement if the product fails under normal use.
Accidental Damage
One-time courtesy replacement at a reduced price.
Zero Hidden Fees
All shipping costs for replacements and returns are covered.
How to File a Claim
How This Differs from the Warranty
The 180-day purchase protection includes accidental damage and performance failures that are typically not covered by a standard warranty. It provides an additional layer of support during the first six months after purchase, giving you greater confidence and peace of mind.
We want you to be completely satisfied with your purchase. If for any reason you are not fully happy, you may return your item within 30 days of delivery for a full refund. No lengthy forms, no unnecessary questions.
Our return policy is built on a simple principle: if the product is not right for you, we will make it right. We understand that online shopping involves trust, and we work hard to earn that trust with every order.
Return Eligibility
30-Day Window
Request a return within 30 days of delivery.
Original Condition
Unworn or unused, with tags and original packaging.
Proof of Purchase
A receipt or order number is required.
Fast Refund
Refund processed within 10 business days.
How to Start a Return
Returns & Exchanges Overview
Damages & Exchanges
Please inspect your order as soon as it arrives. If the item is defective, damaged, or incorrect, contact us immediately so we can evaluate the issue and make it right. For exchanges, the fastest option is to return the original item and place a new order for the replacement.
We believe in the quality of our products, and we want you to share that confidence. Every product is backed by a 24-month warranty covering all structural and functional components, including zippers, buckles, straps, and fabric integrity.
The warranty is designed to be simple and accessible. You only need your proof of purchase to begin a claim, and our team will assess the issue promptly. If a manufacturing issue arises, we will make it right.
What the Warranty Covers
Comprehensive Coverage
Every part warranted for two full years.
Free Repair or Replacement
Whichever is faster, at no cost to you.
Quick Turnaround
Claims assessed within 1 business day.
Transferable
Warranty follows the product, not the owner.
How to File a Warranty Claim
Every order ships free—no minimums, no hidden fees. We currently deliver across the United States and are actively working to expand to more countries. We partner with reliable U.S. courier services to ensure your order arrives safely and on time.
Our delivery process is designed for transparency. From the moment you place your order to the moment it reaches your door, you receive clear updates at every stage. We carefully inspect each product before dispatch, and we provide tracking information as soon as your order ships.
Our U.S. Shipping Partners
USPS
Official national carrier with nationwide coverage.
UPS
Fast and reliable ground and express shipping.
FedEx
Express delivery with real-time tracking.
DHL eCommerce
Efficient parcel delivery for e-commerce shipments.
Delivery Process
Delivery Time Summary
Cancellations & Taxes
You may cancel your order at any time before it ships. All product prices include applicable taxes, and there are no additional VAT or customs fees for orders delivered within the United States.
Whether you have a question, need help with an order, or just want some advice, our support team is available around the clock. We don't just respond to messages—we work with you to find real solutions that fit your needs.
Our support specialists are trained to handle a wide range of requests, from product recommendations to technical troubleshooting. No matter the question, you can expect a professional and friendly response.
How We Can Help
Product Guidance
Our experts help you choose the right product.
Order Assistance
Modify orders, track shipments, or speed up delivery.
Warranty & Returns
Start claims or returns quickly and easily.
Technical Troubleshooting
Step-by-step solutions for product issues.
Contact Information
24/7 Phone
+1 (209) 280-3200
support@hekomart.com
Address
3401 Dale Rd, Modesto, CA 95356
Support Hours
Available 24 hours a day, 7 days a week
