Mountain bikes. They've come a long way since drum brakes and five gears (five!) were considered state of the art.
In BikeRadar's latest video, we chart the top five technical developments that have revolutionised mountain biking and made it the cutting edge sport it is today.
Disc brakes and suspension mechanisms are obvious inclusions, but check out what other items of tech make our list.
Plus, there's some excellent riding footage, too, so take a minute and enjoy the video.
Video: Top five mountain bike innovations