Mount any water bottle cage using BiKase's Cage Strap Adapter to any diameter tube or frame 7" or less. This will allow you to mount a water bottle in all kinds of different areas on your bike, you choose what is best for you! The extra wide 24" strap can be cut to your desired length. The Adapter won't move around because it has a rubber base and compresses on your frame when mounted. Additionally, strap is coated for extra anti-slip and scratch protection. Good for EBikes with no water bottle cage mounts. The water bottle cage is not included.