Sim Racing Cockpit Bundle Assembly: Step-by-Step Setup Guide

Quick answer

Assemble your cockpit bundle in this order: sort hardware and lay out profiles, build the base frame, add the uprights and wheel deck, attach the monitor mount, mount the seat, install pedals and shifter, then route cables and torque everything. The biggest time-saver is leaving every bolt finger-tight until the frame is square, then tightening in stages.

A cockpit bundle saves you the guesswork of matching parts, but it does not assemble itself. The order you build in matters more than how fast you build, because a frame that goes together crooked will fight you at every later step.

This guide walks through a typical aluminium-profile cockpit bundle build, from opening the boxes to the first lap. It uses the SimXPro XT120 + Heavy Triple Monitor Stand Bundle and the SimXPro X80 + Integrated Monitor Mount Bundle as reference points, but the sequence applies to most profile rigs.

Before you start: space, tools, and hardware sorting

Clear a work area at least as large as the finished rig plus a metre on each side. Aluminium profile is heavy and awkward to pivot once partially assembled, so working on a hard, level floor beats a carpet or a cramped corner. Have a hex key set, a tape measure, a spirit level, and a small tray or magnetic dish for bolts ready before you open anything.

Open every box and lay components out by type: long profiles, short profiles, corner brackets, plates, and fasteners. Bundle kits ship with a lot of similar-looking hardware, and mixing up a 20 mm bolt with a 25 mm bolt halfway through the build is the most common cause of stripped threads.

• Checkpoint: confirm every bag of fasteners is accounted for before you tighten anything, so a missing part is caught while returns are still simple.
• Common mistake: cutting packaging open with a blade and scoring a profile surface or a seat fabric underneath.

Build the base frame first, and keep it loose

The base is the foundation everything else references, so it must be flat and square before you add weight above it. Connect the long lower profiles to the front and rear cross members using the supplied corner brackets, and thread every bolt in by hand. Do not fully tighten yet.

Once the rectangle is together, measure both diagonals. If they match, the frame is square. If they do not, push or pull the corners until they do, then snug the base bolts in a cross pattern rather than working around the perimeter. This single check prevents almost every alignment problem later in the build.

• Checkpoint: matching diagonal measurements mean the base is square; a difference of more than a few millimetres will show up as a twisted wheel deck.
• Common mistake: fully tightening the first corner before the frame is square, which locks the error in place.

Add uprights, wheel deck, and pedal deck

With the base square, attach the uprights and the wheel deck. On a bundle like the SimXPro X80 + Integrated Monitor Mount Bundle, the X80 cockpit in black with the Standard Pedal Deck is the structural core, so the wheel deck and pedal deck positions set your reach and leg extension for the whole build. Set them roughly to your body now and fine-tune later.

Sit in the frame with the wheel deck temporarily positioned and check that your arms are slightly bent at full lock and your legs are not over-extended on the pedals. Moving a deck by 20 mm at this stage takes a minute; moving it after the seat and monitors are on takes considerably longer.

• Checkpoint: a comfortable reach now saves a full re-adjustment session after the seat and monitors are mounted.
• Common mistake: setting the wheel deck by eye from standing height instead of sitting in the rig.

Mount the monitor solution before the seat

Monitor mounts are easier to fit while the rig is still light and you can walk around it. If your bundle includes an integrated mount, it attaches directly to the cockpit and positions the display without a separate floor stand. The SimXPro Integrated Triple Screen Setup Heavy is an integrated triple mount for displays up to 32 inches, built on 40 × 80 mm profiles, and it is also supplied as part of the SimXPro XT120 + Heavy Triple Monitor Stand Bundle.

For a triple setup, centre the middle screen on your seating position first, then bring the side screens in and angle them toward you. Tighten the VESA plates only after all three screens are positioned, because adjusting one screen after the others are locked usually means loosening the whole assembly again.

• Checkpoint: sit in the rig and confirm the centre of the middle screen is at eye level before final tightening.
• Common mistake: mounting monitors before the frame is levelled, which leaves the screens visibly tilted relative to the horizon.

Fit the seat and set your driving position

Seat installation is where a bundle earns its keep, because the seat, slider, and mounting hardware are already matched. In the SimXPro X80 + XL GT Seat Bundle, the XL GT Seat includes its slider and mounts directly to the cockpit, so no separate seat mounts or additional slider are needed. That removes a common source of fitment confusion on mixed-part builds.

Bolt the seat in, then run through the full position check: brake pedal at full travel without your knee locking, wheel at a comfortable distance, and the seat back angle supporting your shoulders. Make small adjustments one at a time so you can feel what each change does.

• Checkpoint: you should be able to reach full brake pressure without your hips lifting off the seat back.
• Common mistake: setting seat distance before the pedals are in their final position.

Install pedals and shifter, then torque everything

Mount the pedals to the pedal deck and set the spacing so your feet fall naturally on the faces. The MOZA SRP2 Load Cell Pedals use a 100 kg brake load cell with 15-bit angle sensing and tool-free brake tuning, and the adjustable pedal position helps here: set the physical spacing first, then tune the brake feel. Load cell pedals reward a rigid mounting surface, so check the pedal deck bolts are tight before you judge the feel.

Now go around the entire rig and torque every bolt in stages, starting with the base and working upward. Re-check the base diagonals after tightening, because a frame can pull slightly out of square as fasteners clamp down. Re-level the rig, then move to cable routing.

• Checkpoint: re-measure the base diagonals after final torque; if they shifted, loosen the base and re-square before continuing.
• Common mistake: torquing the frame before the pedals and seat are positioned, then having to loosen structural bolts to move a deck.

Route cables and do a first-session check

Route wheel base, pedal, and monitor cables along the profiles and secure them with clips or ties, leaving a service loop at each device so you can move a component without disconnecting everything. Keep signal cables away from power cables where you can, and make sure no cable runs where your legs or the seat slider will catch it.

Before your first session, confirm the rig does not rock when you push the wheel hard, the monitors do not shake under braking, and the pedals do not flex. Spend ten minutes re-checking bolts after the first hour of driving, since vibration settles new assemblies.

• Checkpoint: a rig that stays still under hard braking and quick steering inputs is assembled correctly.
• Common mistake: leaving cables loose enough to snag the seat slider or pedals during a session.

Assembly sequence at a glance

1. 1. Sort hardware and lay out profiles: Open all boxes, group bolts by length, and confirm every fastener bag is present before assembly begins. Checkpoint: missing parts are far easier to resolve before the rig is half-built.
2. 2. Assemble the base frame finger-tight: Connect lower profiles and cross members with corner brackets, then measure both diagonals to confirm the frame is square. Checkpoint: matching diagonals before tightening prevent a twisted rig.
3. 3. Add uprights, wheel deck, and pedal deck: Set approximate positions for reach and leg extension while the rig is still open and easy to access. Checkpoint: sit in the frame and test reach before moving on.
4. 4. Mount the monitor solution: Fit integrated or freestanding monitor mounts, centre the middle screen on your seating position, then angle side screens inward. Checkpoint: eye-level centre screen before final tightening.
5. 5. Install the seat and set driving position: Bolt in the seat and slider, then adjust distance and angle one change at a time against pedal and wheel reach. Checkpoint: full brake pressure without your hips leaving the seat back.
6. 6. Mount pedals and shifter: Set physical pedal spacing first, then tune brake feel, and confirm the pedal deck is rigid under load. Checkpoint: no pedal deck flex under hard braking.
7. 7. Torque, re-square, and route cables: Tighten all bolts in stages from the base upward, re-check diagonals, re-level, then secure cables with service loops. Checkpoint: re-check bolts after the first hour of driving.

Bundle details that affect your build

• SimXPro XT120 + Heavy Triple Monitor Stand Bundle: Pairs the heavy-duty SimXPro XT120 cockpit with the freestanding SimXPro HEAVY Triple Screen Setup for a rigid three-monitor sim racing installation. Seat, steering hardware and monitors are not included. Plan for a seat, wheel base, wheel, and three monitors separately, and budget floor space for the freestanding stand rather than an integrated mount.
• SimXPro X80 + Integrated Monitor Mount Bundle: Combines the SimXPro X80 in black with Standard Pedal Deck and the black SimXPro Single Integrated Monitor Mount 75/100 VESA. The monitor is not included. The integrated mount attaches to the cockpit, so the build stays compact and you avoid a separate floor stand, but you still need to supply your own display.
• SimXPro X80 + XL GT Seat Bundle: The XL GT Seat includes its slider and mounts directly to the cockpit; no separate seat mounts or additional slider are included or required. You can skip the seat-mount shopping step entirely, which removes a common fitment problem on mixed-component builds.
• MOZA SRP2 Load Cell Pedals: Throttle and brake pedal set with a 100 kg brake load cell, 15-bit angle sensor with sensor-fusion technology, steel and CNC aluminium construction, adjustable pedal position, and tool-free brake tuning. Adjust the pedal position physically before tuning brake feel, and make sure the pedal deck is rigid, since a load cell transfers more force into the frame than a potentiometer pedal.

A cockpit bundle build is mostly about order and patience: square the base, keep bolts loose until the frame is true, position the seat and pedals around your body, and only then torque everything down. Do that, and your rig will feel solid from the first lap instead of flexing under braking.