Universal fitment
These are standalone rims rather than bolt-on mods, which means they work with any hub using the Universal 6-Bolt pattern. That covers most direct drive bases and quick release adapters from Moza, Simagic, Fanatec, Asetek and Cammus, plus aftermarket hubs for Logitech and Thrustmaster bases. Check your hub's pattern before ordering if you are unsure.
Choosing a diameter
Diameter changes how much arm movement a given steering angle takes. 320mm suits GT3, GTE and touring car racing, where quick direction changes matter and you want a compact rim that clears your knees. 350mm suits rally, drift and road cars, where you need leverage and full-lock hand-over-hand steering. Larger rims also give slightly finer control at small inputs, which helps on high-speed ovals.
Suede versus other materials
Suede is what real GT and rally teams use. It grips better than leather when your hands are damp and it does not become slick as it wears, but it needs occasional brushing to stay clean. Race gloves extend its life considerably and are worth the small investment.
Profiles
The D-shape flat-bottom clears your legs in a tight cockpit and gives an obvious straight-ahead reference. The GT3 cup profile adds cutouts at the ten and two positions. The rally profile keeps a full round shape for continuous rotation.
