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If I wanted to fabricate my own carbon fiber deck or shock mounts, what thickness of carbon fiber sheet would be adequate?

most stuff in the rc world that is single thickness (not like a dual deck chassis) is something like 3/32"(.093") or 0.1". That is around 2.4mm I think?

anything at least that thick to 1/8" for heavy duty applications would be fine.

for dual (top) deck and light duty applications, 2mm or something around .062" would probably be OK, but a little light. alot of the touring cars that use dual deck use something like 2mm top plate, and 3mm bottom plate.

Thanks, jwscab. So 2mm - 2.3mm thick would be sturdy enough for shock towers?

I would use heavier thickness for shock towers.....so at least 2.4mm, but preferably 3mm or 1/8th inch. they are exposed more to damage, sticking up above the body, and are also narrow compared to a chassis. Carbon is also kind of brittle, so thicker is better. for fiberglass, you could easily use 2.4mm, which is what most towers are.