Norco Bicycles tests our frames to 10mm above the OEM spec on all models. It is not recommended that you equip your frame with a suspension fork above this travel amount as it will impact the integrity of the frame, this situation will void your warranty. Further, modifying rear travel (on FS bikes) is not recommended whatsoever. Modifying the amount of rear travel will affect component clearances which could result in frame collisions. Not only will this affect the geometry and ride characteristics but will also affect the safety of the rider. Warranty considerations will be void in this scenario.