Marin Rift Zone XR Full Suspension Mountain Bike - Limited EditionMarin Rift Zone XR Full Suspension Mountain Bike Limited Edition The Rift Zone 27. 5 is Marin's most playful trail bike, made for the rider that catches a bit of air off of every root in the trail, is always looking for an alternate line, and ends every ride with a smile. Riding a bike is fun, and having fun on the trail was at the front of Marin's minds when creating the Rift Zone 27. 5. Built around their MultiTrac suspension system, the Rift Zone