What Our Gearhead(R) Experts Are Saying: "I like this adapter for riders running internal hub E-bikes who want to use a Chariot trailer. It's specific, precise, and removes the guesswork when standard hitch hardware won't fit."E-bikes open up new ways to ride farther and carry more, but compatibility can quickly become a hurdle when adding a trailer. The Internal Hub Hitch Adapter M12 x 1. 25 solves that problem for riders using internal hub E-bikes, allowing trusted Thule trailers to integrate cleanly with modern drivetrains. Once installed, it allows smooth, confident towing without compromising fit or safety. For riders relying on internal hub systems, it's the key piece that brings trailer compatibility back into the equation.