285s on a 10.5" wheel should be fine although its about the narrowest tire I would put on a wheel of that width. I have 285s on my 10.5" Venacis only because they were the factory tires and were nearly brand new. Will probably move up to 305s when I need to replace them.
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FI 18" TDX CBE | AMS Short Throw Shifter | Pioneer Avic-Z110BT | Venaci Mesh Wheels - 19x9.5/19x11
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