🔍 Click to enlarge
Image created by XtremeOffice
Created by XtremeOffice
By the manufacturer
The image may differ from the exact product. Always check the specifications for exact size, colour and features. In the generated lifestyle/demonstration photos (with captions created by XtremeOffice), the scale shown is not always realistic — the product is sometimes deliberately shown large and prominently for recognisability.
Topstar office chair Support SY, synchro mechanism, 110 kg
€140,77
incl. VAT
€116,34 excl. VAT (21%)
Price excluding shipping costs: €4,95 incl. VAT for orders under €49,95. From €49,95 we ship for free.
✓ In stock (1 pieces)
Ordered now, delivered Wednesday
Need more? New stock expected in week 48 (23 November - 29 November 2026).
Place your order and we'll make sure it's delivered on time.
Place your order and we'll make sure it's delivered on time.
Brand: Topstar
| Article number | 77240023 |
|---|---|
| EAN | 4014296476308 |
| OEM number | 8550 G26 |
| Weight | 14,150 kg |
|---|---|
| Dimensions | B: 780 mm × H: 340 mm × D: 600 mm |
| Country of origin | EU |
| Customs tariff (HS code) | 94013100 |
| VAT rate | 21% |
This is why Dex likes this article
This office chair effortlessly adapts to your posture thanks to the synchro mechanism and infinitely adjustable backrest. Comfortable seating with support exactly where you need it, all day long.
When do you choose this product?
What does this product do?
This office chair is designed for daily office work involving long periods of sitting. The synchro mechanism ensures that the seat and backrest move simultaneously when you lean back, which promotes a natural sitting posture. The bandscheibensitz (special seat for the spine) supports your back during long working days.
Why this size and load capacity?
With seat dimensions of 460 x 460 mm, this chair offers ample room for comfortable sitting without taking up too much space. The maximum load capacity of 110 kg makes it suitable for most users. The seat height is adjustable between 420 and 550 mm, so you can set the chair to exactly the right height for your desk.
How does the adjustable backrest mechanism work?
You can adjust the height and angle of the backrest step by step using a notched mechanism. This means you can lock the backrest in various positions, so you always find the right support for your working posture. The mechanism clicks into place at every desired position, ensuring stability while you sit.
Practical expansion options
The chair is supplied as standard without armrests, but you can optionally add SU-type armrests (article number 70702900) for extra arm support. For use on hard floors, you can replace the standard castors with hard floor castors (article number 70699950), which protect your parquet or laminate flooring from scratches.
This office chair is designed for daily office work involving long periods of sitting. The synchro mechanism ensures that the seat and backrest move simultaneously when you lean back, which promotes a natural sitting posture. The bandscheibensitz (special seat for the spine) supports your back during long working days.
Why this size and load capacity?
With seat dimensions of 460 x 460 mm, this chair offers ample room for comfortable sitting without taking up too much space. The maximum load capacity of 110 kg makes it suitable for most users. The seat height is adjustable between 420 and 550 mm, so you can set the chair to exactly the right height for your desk.
How does the adjustable backrest mechanism work?
You can adjust the height and angle of the backrest step by step using a notched mechanism. This means you can lock the backrest in various positions, so you always find the right support for your working posture. The mechanism clicks into place at every desired position, ensuring stability while you sit.
Practical expansion options
The chair is supplied as standard without armrests, but you can optionally add SU-type armrests (article number 70702900) for extra arm support. For use on hard floors, you can replace the standard castors with hard floor castors (article number 70699950), which protect your parquet or laminate flooring from scratches.
Dex finds with this article
Specifications according to the manufacturer
Office chair "Support SY"
• Upholstery: 100% polypropylene
• Office chair with ergonomic special ribbon-disc seat
• Seat height adjustment
• Stable, black base
• Load-dependent braked safety double castors for carpeted floors
• Backrest height adjustable via notch mechanism and infinitely tiltable
• Synchronous mechanism
• Spring tension adjustable to body weight
• Seat dimensions: (W)460 x (D)460 x (H)420 - 550 mm
• Optional armrests: type SU or type U2 - height adjustable (not included in delivery)
• Other colours available on request!
Note: Products listed as accessories are not part of the chair and are not included in the delivery!
Recommended seating time: unlimited use
- Recommended for intensive use in a business/home environment
- Use without restrictions
- High seating comfort
- High-quality ergonomic equipment
- EN 1335 1-3 and GS-tested
• Upholstery: 100% polypropylene
• Office chair with ergonomic special ribbon-disc seat
• Seat height adjustment
• Stable, black base
• Load-dependent braked safety double castors for carpeted floors
• Backrest height adjustable via notch mechanism and infinitely tiltable
• Synchronous mechanism
• Spring tension adjustable to body weight
• Seat dimensions: (W)460 x (D)460 x (H)420 - 550 mm
• Optional armrests: type SU or type U2 - height adjustable (not included in delivery)
• Other colours available on request!
Note: Products listed as accessories are not part of the chair and are not included in the delivery!
Recommended seating time: unlimited use
- Recommended for intensive use in a business/home environment
- Use without restrictions
- High seating comfort
- High-quality ergonomic equipment
- EN 1335 1-3 and GS-tested
Specifications
Version
without armrests
Seat upholstery
Polypropylene
Seat colour
royal blue
Load capacity
110 kg
Manufacturer
Hazard information
No hazard classification applies according to the available manufacturer and supplier information.
This product contains no substances classified as hazardous under the CLP Regulation.
This product contains no substances classified as hazardous under the CLP Regulation.
Product information checked by XtremeOffice
This page has been compiled based on information from the manufacturer and our supplier. Last checked on 30-10-2026.
This page has been compiled based on information from the manufacturer and our supplier. Last checked on 30-10-2026.
Related items
This product is also available in other versions and has matching accessories:
| Image | Product | Price | Stock | Order |
|---|---|---|---|---|
 |
€22,20
€26,86 incl.
|
● In stock (4) | ||
 |
€34,26
€41,45 incl.
|
● In stock (5) | ||
|
€116,34
€140,77 incl.
|
● Not in stock | ||
|
€116,34
€140,77 incl.
|
● Not in stock | ||
 |
€116,34
€140,77 incl.
|
● In stock (1) | ||
 |
€116,34
€140,77 incl.
|
● In stock (3) | ||
 |
€11,04
€13,36 incl.
|
● Not in stock | ||
|
€116,34
€140,77 incl.
|
● Not in stock |
×
‹
›
![]()