Very Rare \u0026 Invaluable:SPIN (Single Piece Innovation) Bicycle Wheel for Wheelchair An innovative carbon wheel with Lost-Core Injection. It is a valuable product that is permanently preserved at MOMA. In 1995, we visited Innovations in Composites, Inc. in California and received two SPIN Wheel samples from Mr. Doug Olsen. It seems to be the size of a mountain bike, but the hub has been modified to fit a sporty wheelchair. There is no processing of the handrail. We kept it as a sample. Scratches on the surface, but no major damage. I send this from Japan. ★Price does not include international shipping charges. Please leave a comment and I will respond.