A tensioner comprising a base, a first tensioner subassembly pivotally mounted to the base, a second tensioner subassembly pivotally mounted to the base, a tensile member joining the first tensioner subassembly and the second tensioner subassembly, the first tensioner subassembly urged in a direction opposite the second tensioner subassembly, and a one-way clutch frictionally engaged with the first tensioner subassembly whereby a relative movement of the first tensioner subassembly away from the second tensioner subassembly is restricted for a first predetermined operating condition and a relative movement of the first tensioner subassembly toward the second tensioner subassembly is not restricted for a second predetermined operating condition.