PRIME Aluminium Profile with 8mm Slots: What Can You Build?

Quick answer

GT Omega PRIME aluminium profile with 8mm slots is best for building or expanding a sim rig where you want to add accessories, route cables, and adjust component positions without drilling new holes. If you already own a PRIME Cockpit, PRIME Lite Cockpit, or HYBRID Cockpit, the 8mm slot system lets you mount practical extras such as the PRIME Keyboard Tray and PRO Simulator Clubsport Handbrake Mount at the height and side that suit your driving position. If you need a complete high-torque direct drive setup rather than a custom build, a pre-configured bundle is usually the simpler choice.

If you are planning a custom sim rig extrusion build, the slot size matters more than the colour of the profile. GT Omega PRIME aluminium profile uses 8mm slots, which is a common size for T-nuts, brackets, and accessory plates. That means you can add, move, or remove parts as your setup changes instead of committing to one fixed layout.

This guide gives you concrete decision rules for using 8mm slot profile in a sim racing profile build. It covers what the slots are good for, when a pre-built cockpit or bundle makes more sense, and which GT Omega accessories are designed to fit the PRIME and HYBRID cockpits. Use it to decide what to build first and what to leave for later.

What 8mm slots actually let you do

An 8mm slot is the channel that runs along the aluminium profile. It accepts T-nuts and bolts so you can attach brackets, plates, and accessories at almost any point along the extrusion. On a sim rig, that flexibility is useful because your wheelbase, pedals, shifter, and handbrake rarely all sit in the perfect place on the first attempt. You can loosen, slide, and re-tighten rather than drilling new holes.

The slot also gives you a place to route cables and mount small plates. If you later change wheelbases or add a handbrake, you can usually find a mounting point on the existing profile. The trade-off is that 8mm slot builds need a small amount of planning: you should check that your accessory bolts and T-nuts match the slot width before you buy.

• Check that any accessory you buy uses 8mm-compatible T-nuts or mounting plates.
• Leave a short section of free slot near the wheelbase and pedal plate for future additions.
• Use the slot for cable routing to keep the rig tidy and reduce strain on connectors.

Decision rules for planning your build

Start with the parts that carry load. The wheelbase, pedal plate, and seat mounts should be the first things you position, because moving them later means re-checking your driving position. Accessories such as keyboard trays and handbrake mounts are easier to add afterwards because they do not affect the core structure.

Decide whether you are building around an existing cockpit or starting from loose profile. If you already own a PRIME Cockpit, PRIME Lite Cockpit, or HYBRID Cockpit, you are adding to a known frame, so you can buy accessories that are confirmed to fit. If you are starting from scratch, you will need to plan the frame dimensions and buy compatible brackets and plates separately.

• Mount the wheelbase and pedals first, then add accessories once your seating position is settled.
• Choose accessories that state compatibility with your cockpit model rather than guessing.
• If a product listing does not state a slot size or compatibility, treat that as a limitation and ask before buying.

Accessories that make the most of 8mm slots

The PRIME Keyboard Tray is a practical example. It mounts at any height on the left or right side of the GT Omega PRIME Cockpit, PRIME Lite Cockpit, and HYBRID Cockpit, so you can keep a keyboard within reach without leaving the rig. Because it uses the existing profile, you can move it if you change your seating position or add another accessory nearby.

For handbrake users, the PRO Simulator Clubsport Handbrake Mount places a Clubsport handbrake or TSS where you can reach it easily. It is fully height adjustable and can be mounted on either side. Note that it requires the Pro Mounting Accessory Plate Bracket, so factor that into your plan. Both accessories show the main benefit of 8mm slots: you can fine-tune placement instead of compromising.

• The PRIME Keyboard Tray fits the PRIME, PRIME Lite, and HYBRID cockpits.
• The PRO Simulator Clubsport Handbrake Mount needs the Pro Mounting Accessory Plate Bracket.
• Check left or right mounting preference before you commit to a position.

When a bundle or pre-built cockpit is the better call

A custom profile build is not the fastest route to driving. If your main goal is to get a high-torque direct drive wheel running with minimal assembly decisions, a pre-configured bundle can be more straightforward. The MOZA R21 Ultra & KS Pro - PRIME Sim Racing Bundle pairs a 21Nm direct drive wheelbase with a CRP2 load cell pedal set and KS PRO wheel in one package, so you are not matching torque ratings and mounting patterns yourself.

The trade-off is flexibility. A bundle locks you into a chosen set of components, while an 8mm slot profile build lets you swap parts over time. If you enjoy tuning and expect to change hardware, build on profile. If you want a proven combination and less planning, buy the bundle.

• Choose a bundle when you want a complete high-torque setup without matching parts yourself.
• Choose profile when you expect to change wheelbases, pedals, or accessories over time.
• You can still add profile accessories to a bundle-based rig later if the cockpit uses compatible slots.

Decision rules for your 8mm slot build

• If you already own a PRIME, PRIME Lite, or HYBRID Cockpit: Buy accessories that explicitly list compatibility with your cockpit model, such as the PRIME Keyboard Tray or PRO Simulator Clubsport Handbrake Mount. Checkpoint: confirm the accessory fits your exact cockpit before ordering.
• If you are starting from loose profile: Plan the frame dimensions, then buy 8mm-compatible T-nuts, brackets, and plates. Do not assume a listed accessory includes the mounting hardware unless it says so. Checkpoint: if slot size or hardware is not stated, treat it as unknown and ask.
• If you want a high-torque direct drive setup quickly: Compare the cost and planning time of a custom build against a pre-configured bundle like the MOZA R21 Ultra & KS Pro - PRIME Sim Racing Bundle. Verdict: choose the bundle for speed and a matched component set; choose profile for long-term flexibility.
• If you race on an uneven floor or use a wheel stand: Consider Wheel Stand Feet to improve grip and level the stand, especially if you notice slipping during heavy braking. Next step: check your current feet for wear before adding other accessories.

Product facts that affect your build

• PRIME Keyboard Tray: Mounts at any height on the left or right hand side of the GT Omega PRIME Cockpit, PRIME Lite Cockpit and HYBRID Cockpit. You can position it around your seating and wheel position instead of working around a fixed tray location.
• PRO Simulator Clubsport Handbrake Mount: Fully height adjustable and able to mount on both the left and right hand side, but requires the Pro Mounting Accessory Plate Bracket. Plan for the additional bracket and decide your preferred side before mounting, so you do not have to redo the position later.
• Wheel Stand Feet: Replacement rubber feet for all GT Omega wheel stands, with a wide base for grip and adjustable height for levelling on uneven surfaces. Useful if you run a wheel stand alongside a profile rig and need to stop slipping or level the stand on an uneven floor.

Who this is for

Best for

• Drivers who already own a GT Omega PRIME, PRIME Lite, or HYBRID Cockpit and want to add or reposition accessories.
• Builders who expect to change wheelbases, pedals, or handbrakes over time and want a frame they can adjust.

Not for

• Drivers who want a complete, matched high-torque direct drive setup with minimal planning, who should compare a bundle instead.
• Anyone who needs a fixed, low-maintenance rig and does not want to check slot compatibility or mounting hardware.

Use 8mm slots when you want a sim rig you can adjust as your hardware changes. Start with the load-bearing parts, add accessories that state compatibility with your cockpit, and choose a bundle if you would rather skip the planning. Either way, check the fit before you buy.