Abstract: A seat belt retractor (20) including a spool (100) and a web sensor configured to activate at a desired angular acceleration of the spool (web pullout), the web sensor (200) including an inertia wheel (202) rotatable relative to the spool, a sensor (210) having one or more lock teeth thereon, the sensor pawl (210) being rotationally supported relative to the spool, the web sensor (210) further including a torsion spring having a center coil and a first and second spring leg (206a) and (206b) respectively, the inertia wheel including a plurality of pins (308a-e), the placement of each pin configured to correspond to a set level of annular acceleration, the center coil centrally disposed on the inertia wheel and the first spring leg secured to the spool or pilot wheel and the second spring leg secured to a select one of the pins, the inner wheel configured to cause a relative rotation relative to the spool as the spool is rapidly moved, such relative rotation causing the movement of the sensor from a rest posit