Race Gear Why Aluminum Extrusion Rigs Are the Gold Standard
Aluminum T-slot extrusion (commonly called "80/20" after a major manufacturer) is the material of choice for serious sim rig builders. The reasons are structural and practical.
Rigidity: A properly assembled 8020 rig has essentially zero flex under pedal load. This matters enormously for load cell pedals — a flexy rig absorbs brake pressure input inconsistently, destroying the repeatability you paid for.
Adjustability: Every bolt-on component can be repositioned without drilling. Seat height, monitor distance, wheel height, pedal plate angle — all infinitely adjustable via T-slot hardware. This is critical when multiple family members share the rig or when you're dialing in ergonomics.
Durability: Aircraft-grade 6063 aluminum doesn't rust, fatigue under normal loads, or degrade. A well-built 8020 rig built today will outlast every piece of sim hardware you put on it.
Cost: Raw extrusion from 8020.net or Misumi runs $2–$5 per foot. A complete rig uses 50–120 feet of material — $100–$600 in raw materials for a $2,000+ equivalent commercial rig.
Tools and Materials You Need
You do not need a machine shop to build an 8020 rig. The tool list is short.
Essential tools:
- Miter saw with aluminum-cutting blade (or a hacksaw and patience)
- Metric hex key set (M5 and M8 are the most common bolt sizes)
- Tap and die set for M8 (optional but useful for blind holes)
- Measuring tape, square, level
- Thread-locking compound (Loctite Blue 243)
Hardware and extrusion:
- Profile size: 40x40mm or 40x80mm for main structural members. 80x80mm for the cockpit floor plate
- Corner brackets (cast aluminum, not pressed steel) for every major joint
- T-nuts: pre-inserted or hammer-in, M5/M8 depending on profile
- Cap screws: M5x10 and M8x16 in quantity (buy 100-packs)
Sources: 8020.net (USA), Misumi (fastest shipping, cut-to-length service), OpenBuilds for smaller profiles. Many builders order from Misumi because they'll cut pieces to exact length for minimal extra cost — eliminates the need for a miter saw.
Popular Rig Configurations
Three configurations cover 90% of 8020 sim rig builds.
Cockpit / Open Wheel (F1 style): Low seat position, pedals close, wheel roughly at chest height. Uses a seat slider rail for seating position adjustment. Most popular for single-seater games (F1 series, iRacing formula cars). Requires approximately 80 feet of 40x80mm extrusion.
GT / Reclined: High seat back angle (110–130 degrees), more like a GT car. Wheel farther from seat, pedals at a gentler angle. Better for endurance racing and long sessions. The most common configuration for ACC and GT3 racing.
Motion rig base: If you plan to add motion actuators (2DOF or 3DOF), design the main cockpit plate as a separate sub-frame that mounts to a larger base frame. Getting this wrong means rebuilding the entire rig when you add motion. Plan for it from the start even if you don't add actuators immediately.
Free design resources:
- SimRacing604 on YouTube: complete build series
- r/simracing build thread compendium
- OpenSimRig standard profiles (free, tested, community-vetted)
Critical Assembly Mistakes to Avoid
Most failed 8020 rigs fail for the same reasons.
Under-tightened fasteners: T-slot connections that seem solid by hand will creep under load. Every structural fastener should be torqued to spec and treated with Loctite Blue. Re-torque everything after the first 5 hours of use.
Wrong profile size for the application: 40x40mm single-profile spans longer than 600mm flex under pedal load. Use 40x80mm or double-up 40x40mm for any member that takes direct brake force.
Missing cross-bracing: Rigs that look rigid often rack (parallelogram flex) under side loads. Add diagonal bracing across the floor frame. Two 45-degree pieces of 40x40mm eliminate 80% of rig flex for most builds.
Not anchoring to the floor: Even the most rigid rig will skate on smooth floors under hard braking. Castor cups (rubber pucks under each leg), carpet squares, or actual floor anchors are mandatory.
- Most common regret: building too small — leave space for monitor arms, button boxes, handbrake mounts from the start
- Second most common: not planning cable management — add cable raceways before you mount everything
Budget and Sourcing Guide
A complete 8020 sim rig build (no electronics) breaks down roughly as follows:
Budget build (~$400–$600):
- Misumi extrusion (50ft, 40x40mm) + hardware: $150
- Used racing seat (Corbeau, Sparco road seat): $80–$150
- Wheel/pedal mounting plates (1/4" aluminum flat bar): $40
- Total: $400–$600 with sourcing patience
Standard build (~$700–$1,000):
- Misumi extrusion (80ft mix of 40x40 and 40x80): $300
- New Sparco or OMP road seat: $200
- Triple monitor arm integration: $150
- Cable management, T-handles, rubber feet: $80
Premium build (~$1,500+):
- All 40x80mm + 80x80mm cockpit plate
- Integrated motion rig base
- Custom laser-cut mounting plates
- Commercial seat (Recaro, OMP actual racing seat)
Compare this to a Trak Racer TR80 at $900 or a Next Level Racing GT Evo at $700 — commercial rigs are convenient but structurally inferior and non-configurable for your body.
