For most SIMGASM Pro owners, the Atlas seat is the best match. Pick the Atlas GT for GT, touring and endurance racing, or the Atlas Formula for a low, reclined open wheel position. Choose a Core Recline or Core Bucket seat when a reclining backrest for long mixed sessions or a simple bottom mounted seat suits you better than a modular race shell.
The Pro is sold without a seat, so you choose freely. Below you see how each SIMGASM seat fits the Pro and which mounting parts you need.
Why the seat matters so much on a Pro
The seat is the part of the rig your body touches most, so it shapes how the whole cockpit feels.
The Pro uses a 40 x 160 mm main profile, steel reinforcement at critical mounting points and a pedal deck rated for 300 kg of braking load. With that much stiffness up front, a soft or wobbly seat quickly becomes the weakest link. When you stamp on a heavy brake pedal, your back pushes into the seat. If the seat gives way, your braking feels less precise. So on a flagship frame, a firm and well mounted seat is worth the attention.
GT or Formula first
Before you look at seats, decide how you mostly race. GT drivers sit more upright, with the pedals lower. Formula drivers lie further back, with the feet higher. The Pro pedal deck adjusts for both layouts, so the seat is the part that sets the real character of your rig.
SIMGASM | Pro Aluminum Sim Racing Cockpit - White
Atlas GT and Atlas Formula: the natural match
The Atlas range was designed by SIMGASM itself, around a patented modular base.
Every Atlas seat shares the same lower base. The upper section and matching cushions decide the position: the GT upper section is more upright, the Formula upper section sits lower and more reclined. Add the other upper section later, and the same base turns into a second seat. The cushions are washable memory foam, and you add a lumbar support cushion or coloured cushion sets in red, white, blue or orange. Read our guide on switching an Atlas seat from GT to Formula to see how that works.
The short reel below gives a quick look at a SIMGASM seat up close.
How the Atlas mounts on the Pro
The Atlas is a side mounted seat. You connect it to the Pro with the SIMGASM Seat Bracket Set, made from 4 mm steel, which lets you adjust both height and angle. The shell also has a predefined bass shaker mounting pattern and an extra mounting point for an accessory such as a headset holder. Browse every version in the Atlas sim racing seats collection.
Core Recline and Core Bucket: comfort and value
Not every Pro owner wants a modular race shell, and the Core seats fill that gap.
Core Recline for long and mixed sessions
The Core Recline has a leather and suede finish and a backrest that reclines up to a near vertical position. It also has a 193 x 193 mm pattern underneath that fits almost all standard office chair mechanisms. So it suits drivers who also use the seat for flight sims, long casual sessions or work at a desk.
Core Bucket for a simple fixed position
The Core Bucket has a fixed driving angle, a steel frame and strong side bolsters. It folds only for storage, not for comfort. Underneath sits a 360 x 385 mm bolt pattern for bottom mounting, ideally combined with the SIMGASM Dual Locking Seat Slider Set. That slider has four welded nuts, which makes installation considerably faster and easier than with a universal slider. See both seats in the Core sim racing seats collection.
SIMGASM | Pro Aluminum Sim Racing Cockpit - RothBros
How do you choose between them?
A few simple questions point you to the right seat for your Pro.
Do you race mostly GT or endurance? Choose the Atlas GT. Do you love F1 or other open wheel cars? Choose the Atlas Formula. Do you switch between both? Start with one Atlas and add the second upper section later. Do you want a reclining backrest for long relaxed sessions? Pick the Core Recline. Want a solid fixed seat that bolts on from below? Pick the Core Bucket.
Set the seat height right
Whatever you choose, seat height and angle decide how well you reach the pedals and see the road. Our guide on how high a sim racing seat should sit explains the details. Racing in VR? Then also read whether the SIMGASM Pro is a good VR rig.
SIMGASM | Pro Aluminum Sim Racing Cockpit - JPS
Seats designed by someone who races
The thinking behind SIMGASM seats comes straight from the race track.
Founder Johan Akkerman designed the TRX seat during his time at Trak Racer. Since 2022 he also races real cars, with DNRT BMW E30 Cup titles in 2023 and 2024. Real racing strengthened his view that comfort, adjustability and seating geometry matter as much as raw stiffness. His own simulator combines a SIMGASM cockpit with the Formula Atlas seat. Pair your favourite seat with a SIMGASM Pro cockpit and you get a rig built around the same ideas.
Questions about seats for the SIMGASM Pro
Quick answers to what Pro buyers ask most about seats.
Is a seat included with the Pro?
No. The seat and seat slider are sold separately, so you choose the seat that fits your racing.
Which mounting parts do you need for an Atlas?
You need the SIMGASM Seat Bracket Set. It side mounts the Atlas to the Pro and adjusts height and angle.
Does one Atlas seat cover GT and Formula?
Yes. Add the other upper section to the shared Atlas base, and the matching cushion set comes with it.
Which seat suits flight sims too?
The Core Recline, because its backrest adjusts and it fits standard office chair mechanisms.
Want to learn more? The SIMGASM experts are happy to help.
