Bicycle: Mantis Year: All Model: Pro-Floater Noleen P/N: NR3-MPF Other Model Applications: None -Shock Style availability- -NR-1: No -NR-2: No -NR-3: Yes -NR-4: No Shock Spring Rate: NB1.5-550 (140-170) Additional Rates: NB1-650 (180-200) Shock Stroke: 1.5" stroke Long Travel Availability: Yes, 1.75" stroke with an NB2-550 spring. Notes: NR1 is no longer available.