Tomáš Slavík's new GHOST Nirvana 4X bike check – video
Czech's Marcel Pesek competes in the men's Four Cross JBC 4X Revelations race at the Mountain bike World Championships which takes place in Jablonec nad Nisou, Czech Republic on July 25, 2015. (
Thursday Bicycles
4X (Four Cross) | The Hairy Rider
Hyper 4-Cross 24" Boys' All-Terrain Bike - Walmart.com
Bike Checks: European Four Cross Series 2017 – Reutlingen, Germany - Pinkbike
Four-cross - Wikipedia
4 Cross Mountain Bike Racing and Events
For when you couldn't give a 4X about riding politely... | Cycling | The Guardian