Shimano freehubs can be serviced to an extent, but when they’re worn out, you’ll officially need a whole new freehub as they're not designed to be disassembled, even if it is technically possible.

This is not the case with Shimano's new Q'Auto system, however, as it draws on the rider's own pedaling power. Designed mainly for urban, trekking and gravel bikes – both regular and electric – Q'Auto ...

Thanks to advanced magnet technology, this new freehub design could be less likely to fail. These M-pulse hubs use some of the most powerful magnets, to convert your pedalling power to rear-wheel ...

Shimano XTR: Engineered for the way you ride! We had to keep it a secret for a long time but finally the day has come now to reveal the new XTR to you! We hope you will like it just as much as we do.