This is an adapter to move a bottle cage up or down in your frame by up to 2 inches, made by Mount Skidmore in Australia. It’s particularly useful on road bike frames, allowing you to move your seat tube cage downwards in order to fit a larger partial frame bag.
We stock this adapter for a few reasons. First, it’s bomber (Tour Divide tested!). Second, it has a lot of adjustment range, up to 2 inches up or down. Third – it’s light! We measured one at 23 grams.
Note that the adapter is 5mm thick, so your cage will be that much farther away from the frame (or 10mm away if you use the included spacers to clear a derailleur mount).
We only sell the adapter in Black – for a Silver version, contact Mt Skidmore directly.