EB18: Sub 5g water bottle cage isn't even the lightest from Carbon Works - Bikerumor
Amazon.com: N+1 Carbon Fiber Lightweight Bike Water Bottle Holder- Bicycle Bottle Cage with Integrated Tire Levers and Steel Bolts for MTB, Road Bikes, and Mountain Bikes : Sports & Outdoors
Amazon.com: MARQUE Bike Water Bottle Holder - 18g Bicycle Bottle Cage for Road and Mountain Bike, Made from Lightweight and Durable Aluminum, Available in Black and Silver, Stainless Steel Bolts Included (Black) :
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Is light right? The CarbonWorks bottle cage – ViaVelo Magazine
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ALPITUDE SUPERLEGGERO BOTTLE CAGE IN CARBON 9 grams – CHAINSMITH BIKE SHOP