ROCKBROS Carbon Fiber Bike CranksetLightweight & High Strength: Made from carbon fiber material, this crankset offers an excellent balance between weight and rigidity, enhancing your cycling performance with reduced weight and increased strength. Innovative Design: The one piece forming process ensures durability and performance, while the hollow construction further improves overall efficiency, making your rides smoother and more enjoyable. Corrosion Resistant & Durable: The carbon

HUMANIZATION DESIGN: Reasonable size: only 6mm width

Designed for easy installation and compatibility with most bicycle computers and sport cameras

See It All: 360° rotation

6mm hex keys

If machine washing is necessary

Brake: Centre Lock Disc Brake

Lens height: about 4

built-in vent hole effectively prevents sweat from flowing into the eyes during exercise

this vest enhances your safety by improving visibility in low-light conditions

Color:        Yellow/ Blue / Red / White / Black

Ultra Smooth Bearings

The color-changing lens can change its own color following the change of the external ultraviolet intensity