RH Extend 100 Medium Synchro Back Black Office Chair (with armests)
They are easy to use, with all controls conveniently located on the right while all adjustable parts of the chair are clearly marked.
The RH Extend 100 has an adjustable tilt mechanism which allows the chair to follow the user's movement without muscular effort, providing support and encouraging the correct sitting position.
The 100 version of the RH Extend has a low back and uses a synchro mechanism so the backrest and seat angle move simultaneously when moving. The chair maintains its basic settings regardless of forward and backward movement or lock and release of the tilt mechanism.
- Available in black
- Medium back
- 8S Class A armrests - Adjustable in height and width. Rotating. Armrest height above seat 215–295 mm
- Lower back ergonomic chair
- Adjustable tilt mechanism
- Made from 100% recyclable materials
- Follows RH’s 2PP chair philosophy of movement
- Easily accessible controls
- The Waterfall edge seat reduces pressure on the underside of the thighs to help circulation. The shape keeps the user in the middle of the seat even when pointed correctly forward at the right angle. The seat can be replaced if damaged
- Equipped with Twedts cushion providing quality support for the whole upper body. The shape encourages movement and height can be adjusted with a push of a button
- Standard height 4Q gas stem (400–510 mm)
- Base in grey lacquered aluminium, with black scuff caps for protection
- Castors for carpeted floors
- Seat width:
- 465 mm
- Seat depth:
- 475 mm
- Seat height:
- 410-510 mm
- Seat sliding range:
- 60 mm
- Backrest width:
- 435 mm
- Backrest height:
- 510 mm
- Maximum user weight:
- 133 kg (21 stone)
- Weight:
- 28 kg
- Warranty:
- 10 years, based on 8 hour use
Q: How do I adjust the back angle of my RH Extend 100 medium back chair?
There is a row of 3 buttons on the right hand side of your Extend 100. Lift the middle button to adjust the backrest angle. Release the button to lock in place. The angle should be set so that your back makes contact with the backrest.
Q: My gas stem seems a little stiff – is this normal?
Sometimes, over time, the gas stem can become a little stiff when trying to adjust the height. A quick and easy fix for this is using WD-40 or Vaseline. Apply a light layer of grease to the gas stem, then try adjusting the gas stem 3-4 times. The gas stem should now adjust easily.
Q: Can my seat slide forward?
There is a row of 3 buttons on the right hand side of your Extend 100. Lift the button furthest back on the right hand side. About four fingers width between the front edge of the seat and the hollow of the knee provides good blood circulation.
Q: How do I adjust the height of my neckrest?
Simply move the neckrest up/down to adjust to the correct height for you. If you want to adjust the depth of the neckrest, turn the knob on the side of the neckrest clockwise or anticlockwise, depending on what is comfortable for you.
Q: How do I stop the rocking motion of my RH Extend 100 medium back chair?
There is a tilt lock on the right hand side of your Extend 100, at the back. Turn the handle clockwise to lock your Extend 100. To unlock, simply turn the handle anticlockwise.
If you want to adjust the tension of the tilt motion, use the front handle under the right hand side of your seat. Turn anticlockwise for firmer tension and clockwise to loosen the tension.
Q: We have hot-desking and I want to adjust the backrest height – how do I do this?
There are 2 buttons on the right hand side of your backrest. Press the bottom button to adjust the backrest into the desired height. Lock in position by releasing the button.
Q: My seat has become worn over time – can I just swap a new one for the old one?
Yes, swapping the seat pad is simple. Once you receive your new seat pad, pull off the old worn seat pad. You will notice there are holes underneath around the edge of the seat pad. Simply align these to the seat shell, then push down on the edges to secure the seat pad into place.
Still having problems?
Please give our customer services team a call on +44 (0) 345 345 0010.
