✔VERSATILE: Are you still worried about not having enough space or holes predrilled to install a bottle cage? ROCKBROS 2 in 1 bicycle bottle cage solves these problems, it can be installed on your bicycle handlebars, bicycle seat post, or bicycle frame. The hinged mounting system is quick and easy. very practical and convenient, it is equivalent to buying two different bottle cages.
✔SUPERB STURDY MATERIAL: The mount is made of high-strength aluminum alloy CNC-machined, heat treated for a strong & lightweight design, smooth surface, and rust-proof. The smooth surfaces of the bicycle bottle holder will keep your cup or water bottle secure.
✔HUMANIZED DESIGN: The water bottle holder can be rotated 90 degrees to suit the installation position, you can adjust it horizontally or vertically according to your habit, making it easier for you to pick up the water bottle. (Note: Adjustment requires an Allen wrench tool)
✔DIMENSIONS: This bike cup holder comes with 1 spacer and 1 rubber piece letting you customize your bike mount from 21 to 31.8 mm(0.83-1.25 in) diameter.
✔WIDELY COMPATIBILITY: Suitable for Road Mountain bike, e-bike, kids bike and communt bike. Perfect for biking, camping or traveling etc. also fits most motorcycles, MTB, walker, and fishing umbrella.