Mountain bike reviews, trails reviews, bike parts and components, buy and sell used bikes, forums, hot deals and more - mtbr.com MTBR is a site run by mountain bikers for mountain bikers, bringing you user reviews and editorial reviews on mountain bikes, mountain bike parts, bike trails, a massive discussion forum with over 130 diffrent categories as well as buying and selling used bikes, news, pictures, videos and hot deals - mtbr.com.