With 5 12in of travel, the 2015 Ellsworth Epiphany Alloy 27. 5 Mountain Bike Frame makes a perfect starting place to build your one by dream machine. XC light and all mountain competent, the Epiphany will climb with ease and precisely pick its way down technical descents. Ellsworth claims that the Epiphany's Instant Center Tracking ICT suspension is the most advanced suspension platform in the world. As it moves through travel, ICT keeps the instant center or virtual pivot created by ICT's four bar suspension as close to the chain force line as possible. In on trail terms, this equates to a steady pedaling platform so your power is always transferring into forward motion. Furthermore, ICT doesn't require a lock out, so you can always keep the Rock Shox Monarch rear shock's travel fully active, even while climbing. The addition of chain torque doesn't constrain the system's travel, the Achilles heel of so many otherwise efficient suspension designs, so pedaling and bump compliance aren't working against each other. The end result of ICT is a plush, less fatiguing ride with greater control and responsiveness over all terrain.