Holliston’s “Vietnam Trails” are notorious for their rough terrain and challenging technical climbs, which makes them ideal for testing mountain bikes’ limits. As you can see from BKXC‘s video, these trails are considered by many to some of the most challenging trails in the country! Being based in Holliston, MA, we do a big part of our field testing on these trails, pushing the bikes to their limits and beyond. Which is why we offer a lifetime warranty on all our carbon fiber frames and wheels. Enjoy the video!