· Size: 700C. · Material: Toray T700 & T800 Premium Carbon Fiber. The main difference is "appearance" and "weight". UD is the lightest, 3K/3K twill/12K/12K twill is 0.05% heavier than UD. Because they weave carbon fiber yarn in different ways, it will affect the fluidity of resin and make the whole weight heavier.
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