🔍 Click to enlarge
Image of the brand owner
By the manufacturer


The image may differ from the exact product. Always check the specifications for exact size, colour and features.
Topstar office chair OPA0T B910, synchro-relax mechanism, 110 kg load capacity
€367,72
incl. VAT
€303,90 excl. VAT (21%)
Price excluding shipping costs: €4,95 incl. VAT for orders under €49,95. From €49,95 we ship for free.
✗ Not in stock
Expected from supplier: week 52 (21 December - 27 December 2026)
Brand: Topstar
| Article number | 77240332 |
|---|---|
| EAN | 4014296077857 |
| OEM number | OPA0T B910 |
| Weight | 20,400 kg |
|---|---|
| Dimensions | B: 800 mm × H: 480 mm × D: 600 mm |
| Country of origin | Duitsland |
| Customs tariff (HS code) | 94013100 |
| VAT rate | 21% |
This is why Dex likes this article
Work comfortably for hours without back pain! This chair moves smoothly with you thanks to the synchro-relax mechanism, and the multifunctional headrest gives extra support exactly where you need it.
When do you choose this product?
When should you choose an ergonomic office chair?
This office chair is essential when you work at a desk for long periods and want to combine comfort with good support. The multifunctional headrest and mesh back ensure that your neck and back stay in the right position, while the synchro-relax mechanism follows your movements naturally. This prevents fatigue and tension complaints during long working days.
Why these dimensions suit your workspace
With seat dimensions of 480 x 500 mm and an adjustable height of 430 to 520 mm, this chair fits most standard desks and users. The backrest height of 550 mm provides sufficient back support for people of average height. The 110 kg load capacity makes the chair suitable for a wide range of users.
Benefits of the synchro-relax mechanism
The synchro-relax mechanism is the core of this office chair and ensures that the seat and backrest move in sync when you lean back. This mechanism supports your natural movements and keeps your body in balance. The combination with the mesh back provides good ventilation, so you stay comfortable even in warm weather.
Practical tip for different floor types
The chair comes as standard with castors suitable for soft floors such as carpet. Are you working on a hard floor such as laminate or tiles? Then you can order optional hard-floor castors (article number 70699952). These castors protect your floor against scratches and allow the chair to move more smoothly.
This office chair is essential when you work at a desk for long periods and want to combine comfort with good support. The multifunctional headrest and mesh back ensure that your neck and back stay in the right position, while the synchro-relax mechanism follows your movements naturally. This prevents fatigue and tension complaints during long working days.
Why these dimensions suit your workspace
With seat dimensions of 480 x 500 mm and an adjustable height of 430 to 520 mm, this chair fits most standard desks and users. The backrest height of 550 mm provides sufficient back support for people of average height. The 110 kg load capacity makes the chair suitable for a wide range of users.
Benefits of the synchro-relax mechanism
The synchro-relax mechanism is the core of this office chair and ensures that the seat and backrest move in sync when you lean back. This mechanism supports your natural movements and keeps your body in balance. The combination with the mesh back provides good ventilation, so you stay comfortable even in warm weather.
Practical tip for different floor types
The chair comes as standard with castors suitable for soft floors such as carpet. Are you working on a hard floor such as laminate or tiles? Then you can order optional hard-floor castors (article number 70699952). These castors protect your floor against scratches and allow the chair to move more smoothly.
Specifications according to the manufacturer
Upholstery: 100% polyester, stepless seat height adjustment, multifunctional headrest, mesh backrest, comfortable comfort-tub seat, synchro-relax mechanism, black plastic five-star base, armrests included, load capacity: 110 kg (OPA0T B910)
Seat dimensions: (W)480 x (D)500 x (H)430 - 520 mm
Armrest height: 550 mm
Optional hard floor castors: 70699952
Seat dimensions: (W)480 x (D)500 x (H)430 - 520 mm
Armrest height: 550 mm
Optional hard floor castors: 70699952
Specifications
Version
with armrests
Seat upholstery
Fabric
Seat colour
red
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 |
|---|---|---|---|---|
|
€16,68
€20,18 incl.
|
● In stock (11) | |||
|
€287,10
€347,39 incl.
|
● In stock (2) | |||
![]() |
€303,90
€367,72 incl.
|
● Not in stock |
×
‹
›