Gravel / Gravé / Gnarmac / Groad / ATB

https://bikerumor.com/2019/06/20/cannondale-topstone-carbon-gravel-bike-rolls-a-new-frame-with-kingpin-rear-suspension

Calling Kingpin the first full frame leaf spring system, Kingpin has just one pivot but manages to squeeze out up to 30mm of travel when measured at the seat. While most of the travel is only felt at the saddle when seated, the system does offer a true 10-12mm of travel measured at the rear axle.