This spring has been extensively tested and proven to be the best for overall 990 performance. Whether you're riding alone or with luggage, this high performing spring accommodates a wide weight range, from a 165lb racer to a 225lb BDR Xplorer. The spring rate starts at 15.4kg and smoothly ramps up to 18.4kg, providing a plush ride in the beginning and a life-saving support when you push the limits. If you're looking for the best of all worlds in a rear spring, this 990 ADVENTURE CUSTOM REAR SPRING  is the ultimate choice for your motorcycle. 
225mm length spring is stock length on most 990's.