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Why do carbon rims have different weave finishes: UD, 3K, 12K, Twill, Marble, Butterfly, Forged Texture?
Nov 04 , 2026
A carbon rim starts as layers of carbon fiber cloth and resin, pressed into a mold and cured. The part we see is the outer layer of cloth, and its pattern differs from one rim to the next. Some rims look like plain dark carbon, some show a fine diagonal grid, and some carry a pattern that runs around the rim like a pair of wings. All of these come from the weave, and each one is made in a differen...
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Carbon Rim Brake Track Types Explained: UD, Basalt, 3K, Twill & Grooved
2021-10-12
The market for rim-brake carbon rims has shrunk over recent years, displaced by disc-brake carbon rims which have emerged as the standard. Nevertheless, rim-brake carbon wheels remain a popular pick among many race riders, largely owing to their superior light weight. Meanwhile, a segment of rim-brake riders still own perfectly functional rim-brake frames, so they opt to upgrade to new rim-brake c...
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