Wide rims build into strong and stiff wheels. Also optimize tire performance, for more stable handling and much increased traction and control.
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Before derby rims, wide aluminum rims added at least 1/2 to 3/4 lbs in rolling weight. Heavier rims are slower to accelerate, slower climbing, slower handling. Added wheel weight bounces more, reducing traction, especially at faster speeds.
But now derby rims, the world's first carbon fiber wide rims, are stronger, stiffer, lighter.
Mountain, Road, and Gravel rims.
29'r x 35 and 45mm wide
27.5"/650b x 40 and 50mm wide
26" x 40mm wide
700c x 22 and 23mm inside wide