Aaron Holmes Gwin, an American professional downhill mountain biker from Morongo Valley, California rides a KTM RC390 sportbikes down the hill, but that’s not all in this video.
The catch is, he does this by removing the chain drive which transfers bike’s engine power to the rear wheel which means he has a useless throttle response and unregulated speeds while rushing down. He certainly tested the suspension of a track-focused bike on that bumpy and muddy hill too. Check out for yourself.
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