The FC3S stock steering wheel diameter is 380mm and offset (upward) by 2mm.
Popular aftermarket steering wheels are either 350mm or 320mm in diameter
(centered). We recommend to keep with the 350mm (or larger) diameter for
all vehicles, but this is especially true for manual steering FC's. Those
with power steering can go down to a 320mm unit, but keep in mind this will
block a lot of the instrument cluster display. Even with a 350mm unit,
sometimes the top part of the instrument cluster can be blocked; a steering wheel
hub spacer can be installed so that you can see the entire instrument cluster.
Popular aftermarket steering wheel brands are MOMO, Sparco, and Nardi / Personal.
You'll need a hub adapter (from the appropriate manufacturer) to mount these
aftermarket steering wheels to your FC.
Steering wheel spacer page
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