Ergomax 160 Ratchet
Price range: $649.00 through $851.40

Build your chair using the field selectors below. Where “Choose an option” shows, please make your selection from the available options.
All available options can be viewed under the Specifications tab below. If the options required are not available in the field selectors, contact us with your requirements via Chat or email [email protected]
Perfect for the larger users looking for a versatile chair
Designed for intense office use, the Ergomax 160 Ratchet is a super heavy duty task chair which provides excellent ergonomic support to enhance comfort.
The Ergomax 160 Ratchet features an extra heavy duty 3-lever ratchet mechanism, extra heavy duty gas lift, and heavy duty hi-arch 5-star base. The Ergomax 160 Ratchet accommodates weights of up to 160kgs, suitable for above average users.
With a High Wide Back (H630xW480mm) that has an adjustable angle and height, combined with an Extra Large Memory Foam Seat (D500xW560mm) with adjustable seat height and tilt, the Ergomax HD is perfect for the larger user who is looking for a versatile chair.
The Ergomax 160 Ratchet is Australian Made.
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Alternative spellings: tall back, ergo max, heavy duty, ERGOMAX, ergomaxhd, ergomax hd
Maximum Weight Rating: 160kg
Extra Heavy Duty 3-Lever Heavy Duty Ratchet Mechanism with Adjustable Seat Height, Seat Tilt and Back Angle
High Back:
- Height: 630mm
- Width: 480mm
- Ratchet Height Adjustment
Extra Large Memory Foam Seat:
- Depth: 500mm
- Width: 560mm
- Height Range: 460-580mm
- AFRDI Certified
Overall Dimensions:
- Height (Max): 1220mm
- Height (Min): 1030mm
- Width: 700mm
- Overall Depth: 700mm
Optional 3D Armrests: Height Adjustable (Up & Down), Forward & Backward Adjustable, Inward & Outward Adjustment
- Arm Height From Seat: 160mm Arm
- Height Range: 70mm
Optional Seat Slider
Optional AIR Lumbar Support
Gas Lift: Extra Heavy Duty
Base: Heavy Duty High Arch 5-Star Polished Alloy
Castor Wheels: 50mm Nylon Freewheeling
Fabric: CS Black Fabric – 100% Polyester; Heavy Duty Commercial Use; 3 Year Warranty. (For customized upholstery, please choose Fabric/s from https://wgshowroom.com.au/collections/access Additional charges apply for customized Fabric.  Please allow 4-6 Weeks for Manufacture and Delivery.  A small variation of the final seat size may occur depending on the upholstery chosen.)
Environmental Certification: GECA
Strength and Durability Certification: AFRDI Rated Load – 160kg S/S
Australian Made
Purchase includes: 1 x Ergomax 160 Ratchet as selected fully assembled and ready for immediate use
Watch: Operating the bExact Comfort Control Posture Support System Dials
If you are having any issues with this product, Chat, email [email protected] or phone us on 0403 693 780.
Australia Wide: 2-4 weeks. Please note, longer delivery time frames can sometimes occur.
Need it urgently or want to know when you will receive your order? Check with us before placing your order. Chat, email [email protected] or phone us on 0403 693 780.
Troubleshooting:
Issue: How to adjust the back of the chair
The back of the chair is on a ratchet which is designed for adjustment of the back height (up and down). Usually, the ratchet will have 6 – 7 clicks of adjustment, or have a Multi-click Mechanism that has a higher number of smaller click adjustments. Once the back reaches the top/highest notch, the back will drop down to allow the user to reset the height.
To reset the back of the chair, take the back all the way to the bottom and then raise it click by click, counting the clicks as you go, until it drops. On the last click, before the back drops, is the maximum height the back can be set to. This is harder to do on the Multi-click Mechanism.
Some people adjust the back while seated and raise it past the height of the last notch. Because the person’s back is in contact with the backrest, the back may not drop until the person moves their back away from the chair. Some people push back into their chair while seated, or accidentally raise the back when getting out of the chair.
If the back will not lock into position, repair is required. To confirm, try raising the back a few notches from the lowest height position and push down on the backrest. If it does not hold that position, the back is faulty.
If you are having any issues with this product, Chat, email [email protected] or phone us on 0403 693 780.
Warranty: 15 Years (Standard Use – 8 hour usage per day, 5 days per week)
What do I do if the product is faulty?
1. Cease using the product as it may be unsafe to use. Damage that occurs as a result of continued use of a faulty product will not be covered under warranty. Â
2. Complete and return the Product Repair Request form

















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