The Garmin Tacx Ciro bottle cage looks truly minimal, and has striking visual. At 29 grams, it is as light as you'd expect, with perhaps unexpected superior bottle retention. The black composite shell is augmented by carbon, giving it the strength and resilience of long use to maintain that bottle control, while holding a great balance between light weight and price that full carbon cages just can't beat. The spine is also reinforced for stiffness and durability. The Ciro Water Bottle Cage fits standard diameters bottles.