This Universal Support Bolt is a clever solution for adding bottle cages or cargo cages to bikes lacking the requisite mounting points. These are sold individually, so order one for each hole in the cage you're looking to mount - 2 for standard bottle cages, 3 for most cargo cages. Listed sizes are the largest approximate tube size the clamp will fit, so it is best to order the larger size if in doubt. We also highly recommend using a wrap of adhesive cloth tape or electrical tape under the clamp to protect your frame and provide extra grip for the clamp. Rubber inner tubes are not recommended.
Handcrafted in Durango, Colorado by King Cage.
- 1.5" - most steel frame tubes
- 1.75" - most suspension fork lowers
- 2" - most aluminium frame tubes
IMPORTANT: The USB (or any similar bottle boss adaptor) is NOT recommended for use on tapered fork legs or similar tubes. The clamps will be likely to slip down the tapered section, causing the USB to loosen and the cage to swing into your wheel. Don't be a dummy and use common sense when selecting your mounting location.
NOTE: King Cage has recently updated the design of the USB. See comparison photos. We still have an assortment of the previous design in stock, so orders will be filled with the older version until stock runs out unless you request otherwise.