In search of ever faster bicycles, today’s invention is a new front wheel unit, without all the usual drag-inducing whirling spokes (and no significant weight increase).
Instead, the front wheel is a plain steel circle which has a smooth interior surface.
A single, aerodynamically-profiled fork blade carries two sets of small rollers.
The top set can be slid down the fork so that the rollers can engage with the inside of the wheel. The top set is then moved back upwards and locked in place, so that the wheel can spin, whilst staying in contact with all the rollers.