The Wolf Tooth B-RAD Half Bottle Adapter allows you offset the bottle cage location to make your bottle more accessible, also to fit additional accessories like a pump, tool, tube, etc. Wolf Tooth B-RAD Half Bottle Adapter Features Easy to access bottles and out of the way of legs Easy to install using existing cage mounts on bike(B-RAD Base component required; sold separately) Use the DogBone base variant for curved downtube frames Great for trail, enduro, bike packing, XC, and town/commuting applications. The B-RAD Mini Strap and Accessory Mount were designed especially for the Half Bottle Adapter so it could be mounted to the side of the bottle. But you can customize to fit your needs. Works great with modern trail bikes from companies like Pivot, Intense, and Santa Cruz or others that have difficult bottle access. Wolf Tooth B-RAD Half Bottle Adapter Compatibility Requires use of a B-RAD mounting base Compatible with any bike frame that has 2 standard 64mm spacing bottle cage mounts (most modern frames) If mounting to a curved down tube, your ONLY option may be the separate Dog Bone base and it does not allow for adjustment along the bike frame like other bases Wolf Tooth B-RAD Half Bottle Adapter Specifications Material:  6061-T6 aluminum brackets Weight:  18g Maximum load:  1700g Torque: 3-4 Nm Made in the USA