Theta 200 Ergonomic Office Chair

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Strong lateral lumbar support and a choice of two back options, makes the Theta 200 a great adjustable ergonomic chair for everyday seating. A favourite of occupational therapists.

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Product Description

New to Bad Backs, the Theta 200 has been designed specifically for the larger framed person in mind. Similar to the Baxter ergonomic chair, this quality task chair has all the ergonomic features, a really strong lumbar support, plus a larger seat cushion to provide superior comfort and support for the user.


  • Extra large seat for people who need a wider and deeper seat cushion
  • Ideal for people between 170cm (5'7") to 186 (6'2")
  • Three lever fully adjustable mechanism
  • Independent back angle adjustment
  • Chair height adjustment
  • Chair angle adjustment
  • Back height manual adjustment
  • Choice of extra high back or square back designs
  • Includes sturdy foam for long lasting durability
  • Weight limit 135kg
  • Made in Australia


The Following fabric options are available as standard options at no extra cost.  We recommend the Wortley Access range of fabrics for general purpose office use. This fabric is both durable and stylish. If you would prefer a slightly softer fabric we would recommend the CS Crepe range of fabrics. 

Wortley Access Range Available as Standard (hover over the swatch with your pointer to view the colour description)

Wortley Access Birch Wortley Access Carbon Wortley Access Citrus Wortley Access Denim Wortley Access Falcon Wortley Access Fire Wortley Access Linen Wortley Access Meadow     

Wortley Access Natural Wortley Access Navy Wortley Access Pillar Box Wortley Access Purple Wortley Access Sapphire Wortley Access Tangerine Wortley Access Teal Wortley Access Tweed

CS Crepe Range C (hover over the swatch with your pointer to view the colour description)

CS Crepe Black  CS Crepe Cobalt CS Crepe Grey CS Crepe Ink CS Crepe Navy CS Crepe Red CS Crepe Wine 

Sustainable Living Chelse Q Range (hover over the swatch with your pointer to view the colour description)

In Addition to the standard fabrics above we also offer the very popular Sustainable Living Chelea Q range for our premium chairs. This fabric is available for a small price premium. The drop down fabric selector will show you the additional fee for these fabrics. 

CQ Chelsea Q CQ Chelsea Olive CQ Azalea CQ_Aubergine CQ_Blackbutt CQ_Boronia CQ_Crocus

CQ_Pine CQ_Greygum CQ_Poppy CQ_Hydrangea CQ_Oniscus CQ_Viola CQ_Verbena

Alternatively you can customise your choice from an enormous range of fabrics from the Warwick, Sustainable and Wortley range of fabrics. You can peruse their ranges on the following links and make a selection, then simply call us on 1800 615 666 and we will arrange to quote based on your selection. 

Warwick Fabrics Link     Sustainable Fabrics Link    Wortley Fabrics Link



  • Seat Width 520-530mm
  • Seat Depth 490mm
  • Extra High Back 480 wide x 600 high
  • Square Back 460 wide to 600 high

All sizes are approximate


Allow 2-3 weeks approx. for delivery from date of order. However our Perth store may have stock for immediate delivery. Please call 1800 615 666 to check.

Custom Orders:

Please note that we can supply custom variations of this chair should this be necessary, including different gas cylinders for different chair height range and choice of fabric colours and fabrics including the ECO Wool fabric from Sustainability - See PDF Chart

Call us at 1800-615-666 should you have any questions.

Warranty Information

Five (5) year limited warranty

Please Note:

This product is made-to-order and non returnable unless deemed faulty or damaged.

Shopping with Confidence!

We appreciate that you want to shop with confidence online. And so Bad Backs wishes to confirm the importance we place on your privacy, security, our returns policy and customer service support.

Should you choose to shop in-store, visit one of our stores in Melbourne, Sydney or Perth.

Click here for our store locations.



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