Quick answer

Decide in this order: screen or screenless, rim diameter and material, then mounting and quick-release compatibility, and only then the wheelbase bundle. If you race mostly formula and GT cars and want telemetry at a glance, a screenless wheel with a separate dash or a screen-integrated flagship are the two realistic paths. If you are starting fresh, a direct drive bundle such as the https://gomezsimindustriesem.com/products/interlock-ultra-simucube-2-pro-bundle-a100bead09a0439acd14c99b-1687161Interlock Ultra + Simucube 2 Pro Bundle or the https://gomezsimindustriesem.com/products/gxl-v2-simucube-bundle-59721ce6d32e6dd05d31f01d-1687162GXL V2 + Simucube 2 Pro Bundle removes the guesswork on torque and mounting.

Most formula-style wheel purchases go wrong for one of two reasons: the buyer picks a screen layout that does not match how they actually drive, or they buy a rim that will not bolt to the hub they already own. Both are avoidable with a short checklist.

This guide walks through the decisions that matter in order, using the specifications GSI publishes for its own wheels and rims. Where a specification is not published, treat that as a limitation to confirm with the seller before you order rather than assuming a value.

Start with screen or screenless, not with looks

A screen-integrated wheel puts telemetry, gear, and fuel data directly in your line of sight. The Interlock Ultra is the flagship of the GSI system, featuring a unique rim design with the LED Matrix seamlessly built in, and it delivers a clean, integrated experience right out of the box. That integration is the reason to choose it: fewer cables, fewer separate devices, and a wheel that stands on its own within the Interlock lineup.

A screenless wheel trades that display for a simpler, lighter-feeling silhouette. The GXL V2 is the second ever wheel in the GSI lineup and underwent a complete transformation; it retains the same number of inputs and features as the FPE V2 but presents them in a sleek, screenless silhouette. If you already run a separate dash or you race in VR, the screenless route usually costs less and keeps your view uncluttered.

  • If you race in VR, a screen on the wheel is largely wasted; put the money into the base or rims instead.
  • If you race on a single monitor and glance at telemetry often, an integrated display reduces head movement.

Match rim diameter and material to your driving style

Rim size changes how the wheel feels in your hands more than any other single specification. GSI offers a GT 300 mm Wheel Rim and an Oval 320 mm Wheel Rim, both engineered on a rigid alloy core so every rim provides a stable platform for precise control and accurate force feedback response. The motorsport-inspired shapes support natural ergonomics, which matters most in long sessions where consistency beats one fast lap.

Both rims use a 70mm PCD bolt pattern, which is compatible with the GSI Interlock system as well as sim racing button boxes that use a 70mm PCD bolt pattern. The 300 mm size suits formula and prototype cars where quick, tight steering input is normal. The 320 mm oval shape suits oval and stock-car style driving where a wider rim and a different hand position reduce fatigue over long runs.

  • Pick the diameter to match the car class you race most, not the one you race occasionally.
  • Both rims offer Material and Center Option choices; decide those after you have settled the diameter.

Check the mounting chain before you buy anything

The wheel is only one link in a chain that runs rim, quick release, extension hub or adapter, and wheelbase. GSI captive screws are custom made for sim racers to properly connect quick releases, extension hubs and adapters from threaded to threaded elements. They are made from high grade 12.9 carbon steel black with custom 360 loctite for maximum hold and strength, with an 8mm smooth shaft and a 5mm threaded portion specific to most sim racing equipment.

Common uses include mounting Fanatec Podium hubs and other threaded connections. If your existing hardware uses a different thread or shaft length, this screw set is not a universal fix, and that is a real limitation to check before ordering. Measure your current stack first, then buy the wheel.

  • Confirm your quick release and hub thread type before choosing a rim.
  • If you are unsure of a thread specification, ask the seller rather than guessing.

Decide whether to bundle the wheelbase

Buying a wheel and base separately lets you reuse hardware you already own, but it also means matching torque, mounting pattern, and software yourself. A bundle removes that work. The Interlock Ultra + Simucube 2 Pro Bundle and the GXL V2 + Simucube 2 Pro Bundle pair a GSI wheel with a Simucube 2 Pro base, so the compatibility question is already answered.

Simucube 2 wheelbases are built to stand the test of time, using high-grade hardware in all aspects of manufacturing, so you do not need to worry about the product breaking or shutting down mid-race. If you already own a compatible base, buying the wheel alone is the cheaper path. If you are starting from nothing, the bundle is the lower-risk one.

  • Bundles suit first-time direct drive buyers; standalone wheels suit people upgrading an existing rig.
  • Confirm which Simucube 2 wheelbase variant a bundle includes before comparing prices.

Decision rules for choosing a formula-style wheel

  • If you race in VR, go screenless: A screen you cannot see is money you cannot use. The GXL V2 keeps the same number of inputs and features as the FPE V2 in a sleek, screenless silhouette. Put the savings into the base or a second rim.
  • If you race on a monitor and want data in view, go screen-integrated: The Interlock Ultra builds the LED Matrix seamlessly into the rim for a clean, integrated experience out of the box. Fewer cables and no separate dash to mount.
  • If you race formula or prototype cars, choose the 300 mm rim: The GT 300 mm Wheel Rim uses a rigid alloy core and a 70mm PCD bolt pattern for precise control and accurate force feedback response. Smaller diameter suits tighter, quicker steering input.
  • If you race ovals or long stock-car runs, choose the 320 mm oval: The Oval 320 mm Wheel Rim shares the alloy core and 70mm PCD pattern but uses motorsport-inspired shapes for natural ergonomics over long sessions. Wider rim, less hand fatigue on extended runs.
  • If you are starting from zero, buy the bundle: The Interlock Ultra + Simucube 2 Pro Bundle and the GXL V2 + Simucube 2 Pro Bundle settle base compatibility for you, and Simucube 2 wheelbases are built with high-grade hardware to stand the test of time. Skip the torque and mounting research on your first direct drive setup.
  • If your mounting is threaded to threaded, add the screws: GSI captive screws are made from high grade 12.9 carbon steel black with custom 360 loctite, an 8mm smooth shaft and a 5mm threaded portion, and are not universal. Measure your current stack before ordering.

Product facts that affect the decision

  • Interlock Ultra + Simucube 2 Pro Bundle: The Interlock Ultra is the flagship of the system, featuring a unique rim design with the LED Matrix seamlessly built in, delivering a clean, integrated experience right out of the box. Choose this if you want telemetry on the wheel and fewer separate devices on the rig, and you are buying the base at the same time.
  • GXL V2 + Simucube 2 Pro Bundle: The GXL V2 retains the same number of inputs and features as the FPE V2 but presents them in a sleek, screenless silhouette. Choose this if you already have a dash or race in VR and want the same control count without paying for an integrated display.
  • GT 300 mm Wheel Rim: Engineered on a rigid alloy core with a 70mm PCD bolt pattern, compatible with the GSI Interlock system and sim racing button boxes using a 70mm PCD pattern. The 300 mm size suits formula and prototype driving, and the 70mm PCD keeps it usable across common button boxes.
  • Oval 320 mm Wheel Rim: Engineered on a rigid alloy core with a 70mm PCD bolt pattern, with motorsport-inspired shapes that support natural ergonomics for long sessions. The wider 320 mm oval shape reduces hand fatigue in oval and stock-car style racing while staying compatible with the same mounting standard.

Who should buy which

Best for

  • Drivers who want telemetry in their line of sight and are buying a wheel and base together
  • Formula and GT racers who prefer a 300 mm rim on a rigid alloy core
  • Oval and stock-car racers who want a wider 320 mm rim for long sessions
  • VR racers who want the same input count as the FPE V2 without paying for a screen

Not for

  • Drivers who already own a compatible wheelbase and only need a replacement rim
  • Buyers who need a thread specification GSI does not publish and cannot confirm with the seller
  • Anyone expecting the Captive Screw Set to fit every quick release or hub without checking threads

Work through the order above: screen or screenless, rim diameter and material, mounting chain, then the base. That sequence prevents the two most common regrets, and it makes the price difference between a standalone rim and a bundle easy to judge on your own terms.